# VARASYS PolyMeter - PM_G-1 "Grid" firmware (CircuitPython edition) # Pimoroni Pico Scroll Pack (PIM545): a plain Raspberry Pi Pico (RP2040) + a 17x7 single-colour # white LED matrix (IS31FL3731 over I2C @ 0x74) + 4 buttons (A/B/X/Y). No touchscreen, no joystick, # no speaker. Audio is over USB-MIDI (the editor's "Device audio"); an OPTIONAL piezo on a free GPIO # can be enabled below. # # Sibling to PM_K-1 (../pico-cp/) and PM_X-1 (../pico-explorer/). SAME engine, SAME program-string # grammar, SAME programs.json, SAME web editor, SAME live-sync protocol. The Grid build is READ-ONLY # on the device (no on-device beat editing); editing happens in the web editor with Live sync on. # # The 7-row x 17-column matrix is the editor's lane x step pad grid in miniature: each lane is a row, # each step a column, brightness encodes accent / normal / ghost; a moving playhead column tracks the # beat. Three views (button B cycles): Grid, Pendulum, BPM. # # WHY CIRCUITPYTHON: the board mounts as a USB drive (CIRCUITPY) carrying this code + your tracks + # an offline copy of the editor; edits in the web editor are pushed over USB-MIDI. Pinout in README.md. import board, busio, digitalio, time, json, gc, os, supervisor try: import pwmio # only needed if an optional piezo is wired (P_BUZZER below) except ImportError: pwmio = None supervisor.runtime.autoreload = False # we write our own files (log + pushed programs); never self-restart APP_VERSION = "0.0.1" # firmware version (the A/B updater pushes/compares this) DEVICE_ID = "G" # 'G' = Grid (Scroll Pack); 'K' = 52Pi kit, 'X' = Explorer (see docs/livesync-protocol.md) try: import rtc # set from the editor's clock SysEx so the log has real timestamps except ImportError: rtc = None try: import usb_midi # sends a MIDI note per click to the computer + carries the editor link except ImportError: usb_midi = None try: from binascii import a2b_base64 # decode the base64-encoded .mpy pushed by the editor's one-click update except ImportError: a2b_base64 = None # ============================== CONFIG (tweak if needed) ============================== MIDI_ENABLED = True # send a USB-MIDI note per click (play via the web editor's "Device audio") MIDI_CHANNEL = 10 # 1..16 - GM channel 10 is the drum channel MIDI_CLOCK_OUT = False # send 24 PPQN MIDI Clock so a DAW can slave its tempo to the metronome MIDI_CLOCK_OUT_TRANSPORT = True MIDI_CLOCK_IN = False # follow an external 24 PPQN clock MIDI_CLOCK_IN_TRANSPORT = True MUTE_SPEAKER = False # always silence the optional piezo SPEAKER_AUTO_MUTE = False # auto-mute the piezo when a MIDI host is listening (Live sync heartbeats every 5s) BRIGHTNESS = 160 # accent brightness 0..255; normal/ghost scale from it (Y/X tune tempo, not this) # ----- pins (Pimoroni Pico Scroll Pack layout; verified against pimoroni-pico pico_scroll source) ----- P_BTNA, P_BTNB, P_BTNX, P_BTNY = board.GP12, board.GP13, board.GP14, board.GP15 # the 4 switches P_SDA, P_SCL = board.GP4, board.GP5 # IS31FL3731 I2C bus MATRIX_ADDR = 0x74 # IS31FL3731 default address on the Scroll Pack P_BUZZER = None # OPTIONAL: set to e.g. board.GP16 if you solder a piezo to a free GPIO; None = silent (MIDI only) MIN_LOG_SEC = 5 # don't log plays shorter than this # ----- BUILT-IN playlists: same defaults as the Kit / Explorer so all firmwares feel identical ----- BUILTIN_SETLISTS = [ ("Styles", [ ("Four-on-the-floor", "t120;kick:4;snare:4=.x.x;hatClosed:4/2"), ("Swing ride", "t150;ride:4/2s;kick:4=X..x;snare:4=.x.x"), ("Purdie half-time shuffle", "t92;kick:4/3=X....x...x..;snare:4/3=..gg.gX.gg.g;hatClosed:4/3=X.xX.xX.xX.x"), ("Samba (2/4)", "t104;tomLow:2/4=x...X...;hatClosed:2/4;woodblock:2/4=X.xx.xX."), ("Nanigo (6/8 bembe)", "t130;cowbell:4/3=X.xx.x.xx.x.;kick:4/3=X.....X.....;hatClosed:4/3=..x..x..x..x"), ("6/8 groove", "t100;kick:3+3=x..x..;snare:3+3=...x..;hatClosed:3+3/2"), ("7/8 (2+2+3)", "t130;kick:2+2+3=x..x..x;hatClosed:2+2+3/2"), ("5/4 (3+2)", "t112;kick:3+2=x..x.;snare:3+2=..x..;hatClosed:3+2/2"), ]), ("Practice", [ ("5 over 4 polyrhythm", "t100;kick:4;claves:5~"), ("3 over 2 hemiola", "t96;woodblock:2;cowbell:3~"), ("2 & 4 & 3 over one bar", "t100;kick:3;cowbell:2~;claves:4~"), ("Triplet hats", "t100;kick:4;snare:4=.x.x;hatClosed:4/3"), ("Tempo builder 80 up", "t80;woodblock:4;rmp80/4/4"), ("Gap trainer (play 2 / rest 2)", "t100;kick:4;hatClosed:4/2;tr2/2"), ]), ("Song (continuous)", [ ("Intro - hats & kick", "t88;b4;kick:4=X.x.;hatClosed:4/2=gggggggg"), ("Groove in - backbeat", "t88;b4;kick:4=X.x.;snare:4=.X.X;hatClosed:4/2"), ("Half-time shuffle", "t92;b4;kick:4/3=X....x...x..;snare:4/3=..gg.gX.gg.g;hatClosed:4/3=X.xX.xX.xX.x"), ("Build - ramp 92-120", "t92;b4;rmp92/4/2;kick:4;snare:4=.X.X;hatClosed:4/2"), ("Four-on-the-floor (909)", "t124;b4;kick909:4;clap909:4=.X.X;hat909:4/2=.X.X.X.X"), ("Samba break (2/4)", "t116;b4;tomLow:2/4=x...X...;hatClosed:2/4;woodblock:2/4=X.xx.xX."), ("Peak - 16ths", "t132;b4;kick:4=X..x;snare:4=.X.X;hatClosed:4/4"), ("Outro - ramp down", "t132;b4;rmp132/-7/1;kick:4=X..x;hatClosed:4/2=gggggggg"), ]), ] SOUND_GM = {"kick":36,"kick808":36,"kick909":36, "snare":38,"snare808":38,"snare909":38, "clap":39,"clap808":39,"clap909":39, "rim":37, "hatClosed":42,"hat808":42,"hat909":42, "hatOpen":46,"openHat808":46, "ride":51,"ride909":51, "crash":49,"crash909":49, "tomLow":41,"tom808":45,"tomMid":45,"tomHigh":48, "tambourine":54, "cowbell":56,"cowbell808":56, "woodblock":76,"jamblock":76, "claves":75, "beep":37} GM_DEFAULT = 37 MIDI_VEL = {2: 120, 1: 90, 3: 45} # accent / normal / ghost # ============================== POLYMETER ENGINE (identical to ../pico-explorer/app.py) ============================== PAT = {'X': 2, 'x': 1, 'g': 3, '.': 0, '-': 0, '_': 0, 'f': 1, 'F': 2, 'd': 1, 'D': 2, 'z': 1, 'Z': 2} # ornament hits: UPPER = accented, lower = normal ORN = {'f': 1, 'F': 1, 'd': 2, 'D': 2, 'z': 3, 'Z': 3} # ornament type: 0 none / 1 flam / 2 drag / 3 roll PRIO = {2: 3, 1: 2, 3: 1} GM_NUM = {35: "kick", 36: "kick", 37: "rim", 38: "snare", 39: "clap", 40: "snare", 41: "tomLow", 42: "hatClosed", 43: "tomLow", 44: "hatClosed", 45: "tomMid", 46: "hatOpen", 47: "tomMid", 48: "tomHigh", 49: "crash", 50: "tomHigh", 51: "ride", 53: "ride", 54: "tambourine", 56: "cowbell", 75: "claves", 76: "woodblock", 77: "woodblock"} def _euclid(k, n, rot): # even distribution: k hits over n steps, rotated (matches web euclid()) n = max(1, n); k = max(0, min(n, k)); rot = ((rot % n) + n) % n return [1 if ((((i + rot) % n) * k) % n) < k else 0 for i in range(n)] def parse_program(s): bpm = 120; lanes = []; bars = 0; ramp = None; trainer = None; rep = None; end = None for tok in s.strip().split(';'): tok = tok.strip() if not tok: continue if tok[0] == 't' and tok[1:].isdigit(): bpm = int(tok[1:]); continue if tok[0] == 'b' and tok[1:].isdigit(): bars = int(tok[1:]); continue if tok.startswith('rmp'): p = tok[3:].split('/') if len(p) == 3: try: ramp = {'start': int(p[0]), 'amt': int(p[1]), 'every': max(1, int(p[2]))} except ValueError: pass continue if tok.startswith('tr') and '/' in tok and ':' not in tok: p = tok[2:].split('/') if len(p) == 2: try: trainer = {'play': max(0, int(p[0])), 'mute': max(0, int(p[1]))} except ValueError: pass continue if tok.startswith('rep='): # rep= cycles before the end-action fires (playback flow) try: rep = max(1, int(tok[4:])) except ValueError: pass continue if tok.startswith('end='): # end=stop | end=next(+1) | end=<+/-N> relative goto; absent = loop forever v = tok[4:] if v == 'stop': end = 'stop' elif v == 'next': end = 1 else: try: end = int(v) except ValueError: pass continue if ':' not in tok: continue lane = _parse_lane(tok) if lane: lanes.append(lane) if not lanes: lanes = [_parse_lane("beep:4")] return max(5, min(300, bpm)), lanes, bars, ramp, trainer, rep, end def _parse_lane(tok): poly = '~' in tok; mute = '!' in tok tok = tok.replace('~', '').replace('!', '') gain = '' if '@' in tok: tok, _, g = tok.partition('@'); gain = '@' + g sound, _, rest = tok.partition(':') if sound.isdigit(): sound = GM_NUM.get(int(sound), sound) # GM note-number alias (e.g. 36 -> kick) euc = None # euclidean (k,n,rot) shorthand - pulled before the =/ splits lp = rest.find('(') if lp >= 0: rp = rest.find(')', lp) if rp > lp: nums = [int(x) for x in rest[lp + 1:rp].split(',') if x.strip().isdigit()] rest = rest[:lp] + rest[rp + 1:] if nums: euc = nums pattern = None if '=' in rest: rest, _, pattern = rest.partition('=') sub = 1; swing = False if '/' in rest: rest, _, sd = rest.partition('/') swing = sd.endswith('s'); sd = sd.rstrip('s') sub = int(sd) if sd.isdigit() else 1 groups = [int(g) for g in rest.split('+') if g.isdigit()] or [4] beats = sum(groups); starts = set(); acc = 0 for gp in groups: starts.add(acc); acc += gp if euc: # euclidean: k hits over n steps, first hit accented k = euc[0]; n = euc[1] if len(euc) > 1 else beats * sub; rot = euc[2] if len(euc) > 2 else 0 if len(euc) > 1: if n % beats == 0: sub = n // beats else: groups = [n]; sub = 1 steps = n; levels = []; first = True for h in _euclid(k, n, rot): if h: levels.append(2 if first else 1); first = False else: levels.append(0) orns = [0] * len(levels) # euclid hits carry no ornament elif pattern: steps = beats * sub levels = [PAT.get(ch, 0) for ch in pattern] orns = [ORN.get(ch, 0) for ch in pattern] # per-step flam/drag/roll, parallel to levels if len(levels) < steps: levels += [0] * (steps - len(levels)); orns += [0] * (steps - len(orns)) steps = len(levels) else: steps = beats * sub levels = [] for i in range(steps): if i % sub == 0: levels.append(2 if (i // sub) in starts else 1) # beat: accent on group starts else: levels.append(1) # off-beat subdivisions sound at normal orns = [0] * steps if sound not in SOUND_GM: sound = "beep" # unknown sound -> beep (match web) return {'sound': sound, 'sub': sub, 'swing': swing, 'steps': steps, 'levels': levels, 'orns': orns, 'poly': poly, 'mute': mute, 'groups': groups, 'gain': gain} PAT_CH = {2: 'X', 1: 'x', 3: 'g', 0: '.'} ORN_CH = {1: ('f', 'F'), 2: ('d', 'D'), 3: ('z', 'Z')} # ornament -> (normal, accented) pattern char def _cell_ch(v, o): # (level, ornament) -> one pattern char if o in ORN_CH: return ORN_CH[o][1 if v >= 2 else 0] return PAT_CH.get(v, '.') def lane_to_str(L): s = L['sound'] + ':' + '+'.join(str(g) for g in L.get('groups', [4])) if L['sub'] != 1 or L['swing']: s += '/' + str(L['sub']) + ('s' if L['swing'] else '') orns = L.get('orns') or [0] * len(L['levels']) s += '=' + ''.join(_cell_ch(v, orns[i] if i < len(orns) else 0) for i, v in enumerate(L['levels'])) s += L.get('gain', '') if L['poly']: s += '~' if L['mute']: s += '!' return s _ALNUM = "abcdefghijklmnopqrstuvwxyz0123456789" def _slkey(t): return "".join(c for c in t.lower() if c in _ALNUM) def load_user_setlists(): try: with open("/programs.json") as f: d = json.load(f) except Exception as e: print("programs.json:", e); return [] def items_of(pl): return [(p.get("name", "?"), p.get("prog", "")) for p in pl if p.get("prog")] out = [] try: if isinstance(d.get("setlists"), list): for sl in d["setlists"]: it = items_of(sl.get("programs", [])) if it: out.append((sl.get("title", "My set list"), it)) elif isinstance(d.get("programs"), list): it = items_of(d["programs"]) if it: out.append((d.get("title", "My set list"), it)) except Exception as e: print("setlists:", e) return out # ============================== IS31FL3731 DRIVER (vendored: bulk-framebuffer, one I2C block write per frame) ============================== # The Scroll Pack wires its 17x7 matrix to the IS31FL3731 with the Scroll pHAT HD pixel map # (verified from adafruit_is31fl3731.scroll_phat_hd). We keep a 144-byte PWM framebuffer and push # the whole thing in a single I2C transaction at the colour-register offset (0x24) - per-pixel I2C # writes are far too slow to animate a metronome. def _pixel_addr(x, y): if x <= 8: x = 8 - x; y = 6 - y else: x = x - 8; y = y - 8 return x * 16 + y class Matrix: WIDTH = 17; HEIGHT = 7 def __init__(self, i2c, addr=MATRIX_ADDR): self.i2c = i2c; self.addr = addr self._zero = bytes(144) self.fb = bytearray(145); self.fb[0] = 0x24 # fb[0] = COLOR_OFFSET register; fb[1:] = 144 PWM bytes self._w(bytes([0xFD, 0x0B])) # select the Function (config) bank self._w(bytes([0x0A, 0x00])) # Shutdown register -> software shutdown (sleep) while we configure self._w(bytes([0x00]) + bytes(13)) # clear config regs 0x00..0x0C: Picture Mode, frame 0, audiosync off self._w(bytes([0xFD, 0x00])) # select frame 0 self._w(bytes([0x00]) + b"\xff" * 18) # LED-control regs 0x00..0x11 -> enable every LED self._w(bytes([0xFD, 0x0B])); self._w(bytes([0x0A, 0x01])) # back to config bank; Shutdown -> normal operation self._w(bytes([0xFD, 0x00])) # frame 0 selected for all subsequent PWM writes self.show() # blank it def _w(self, data): self.i2c.writeto(self.addr, data) def clear(self): self.fb[1:] = self._zero def get(self, x, y): if 0 <= x < 17 and 0 <= y < 7: return self.fb[1 + _pixel_addr(x, y)] return 0 def set(self, x, y, v): if 0 <= x < 17 and 0 <= y < 7: self.fb[1 + _pixel_addr(x, y)] = v & 0xFF def show(self): try: self.i2c.writeto(self.addr, self.fb) except Exception: pass # 3x5 digit glyphs for the BPM view (each value is 5 rows; bit2 = leftmost column) DIGITS = { '0': (7, 5, 5, 5, 7), '1': (2, 6, 2, 2, 7), '2': (7, 1, 7, 4, 7), '3': (7, 1, 7, 1, 7), '4': (5, 5, 7, 1, 1), '5': (7, 4, 7, 1, 7), '6': (7, 4, 7, 5, 7), '7': (7, 1, 2, 2, 2), '8': (7, 5, 7, 5, 7), '9': (7, 5, 7, 1, 7), } # 3x5 uppercase letters + marks for the boot splash (scrolls the model name "PM-G1 GRID") LETTERS = { 'P': (7, 5, 7, 4, 4), 'M': (5, 7, 7, 5, 5), 'G': (7, 4, 5, 5, 7), 'R': (7, 5, 7, 6, 5), 'I': (7, 2, 2, 2, 7), 'D': (6, 5, 5, 5, 6), '-': (0, 0, 7, 0, 0), ' ': (0, 0, 0, 0, 0), } # ============================== APP ============================== def _make_i2c(): # The Pico Scroll Pack has NO external I2C pull-up resistors - it relies on the RP2040's # *internal* pull-ups (Pimoroni's C++ calls gpio_pull_up()). CircuitPython's busio.I2C # refuses with "No pull up found on SDA or SCL" unless those internal pulls are on, so: # 1) pre-enable the internal pull-ups on the pads, then try the fast hardware busio; # 2) if that still won't init, fall back to bitbangio, which drives the lines using the # internal pulls inherently (slower, but always works on a pull-up-less board). try: for p in (P_SDA, P_SCL): d = digitalio.DigitalInOut(p); d.switch_to_input(pull=digitalio.Pull.UP); d.deinit() except Exception: pass try: return busio.I2C(P_SCL, P_SDA, frequency=400_000) except Exception as e: print("busio I2C unavailable (%s) - using bitbangio" % e) import bitbangio return bitbangio.I2C(P_SCL, P_SDA, frequency=400_000) class App: def __init__(self): self.i2c = _make_i2c() while not self.i2c.try_lock(): pass # the firmware owns the matrix bus for its lifetime self.mtx = Matrix(self.i2c) self.midi = usb_midi.ports[1] if (MIDI_ENABLED and usb_midi and len(usb_midi.ports) > 1) else None self.midi_in = usb_midi.ports[0] if (MIDI_ENABLED and usb_midi and len(usb_midi.ports) > 0) else None self._mbuf = bytearray(64); self.midi_host = False; self.last_midi_in = 0.0 self._sx = bytearray(); self._sxon = False # USB-MIDI SysEx assembler self._fw = None; self._fw_n = 0; self._fw_pushing = False # chunked firmware transfer state + bus-quiet flag # optional piezo (the Scroll Pack has no onboard speaker) if P_BUZZER is not None and pwmio is not None: self.spk = pwmio.PWMOut(P_BUZZER, frequency=1600, variable_frequency=True, duty_cycle=0) else: self.spk = None self._buzz_off = 0 # buttons - active-low with internal pull-ups self.btnA = self._btn(P_BTNA); self.btnB = self._btn(P_BTNB) self.btnX = self._btn(P_BTNX); self.btnY = self._btn(P_BTNY) self._prev = {'A': True, 'B': True, 'X': True, 'Y': True} self._press = {'A': 0, 'B': 0} # press-start time for A/B tap-vs-hold self._held_t = {'X': 0, 'Y': 0}; self._next_rep = {'X': 0, 'Y': 0} # tempo auto-repeat on held X/Y self.running = False; self.bpm = 120; self.idx = 0; self.lanes = []; self.bars = 0 self.ramp = None; self.trainer = None; self._lastbar = -1; self._muted = False; self._ramp_base = 120 self.rep = None; self.end = None # per-track playback flow: rep=cycles, end=stop|next|+/-N goto self.continue_on = False; self._advance = False self._next_pending = None; self._seam_t = 0 self.view = 0 # 0 = Grid, 1 = Pendulum, 2 = BPM (button A-hold cycles) self._beatflash = 0; self._beatflash_off = 0 self._bpm_flash = 0 # while set, render() briefly shows the BPM view (so X/Y nudges are visible in any view) self._beat_ns = 60_000_000_000 // self.bpm self._note_buf = bytearray([0x90, 0, 0]) self._clock_byte = bytes([0xF8]); self._start_byte = bytes([0xFA]); self._stop_byte = bytes([0xFC]) try: o = os.urandom(4); self._sync_origin = "d" + "".join("%02x" % b for b in o) except Exception: self._sync_origin = "d%08x" % (time.monotonic_ns() & 0xFFFFFFFF) self._sync_armed = False; self._sync_seq = 0; self._sync_applying = False self._sync_heartbeat_next = 0.0 self._clock_next = 0; self._clock_in_last_t = 0; self._clock_in_avg = 0; self._slaved = False self.lane_pads = []; self.lane_lit = [] # unused on the LED build; kept so live-sync guards stay valid self.usb_conn = False; self._m_steps = 0; self._seg_start = 0.0 # practice log + settings self.can_write = self._probe_write(); self._load_settings() self.log = self._load_log(); self.play_start = None; self.play_bpm = 0; self.play_name = "" self.sl = 0; self.rebuild_setlists() self.dirty = True self.load(0) def _btn(self, pin): d = digitalio.DigitalInOut(pin); d.direction = digitalio.Direction.INPUT; d.pull = digitalio.Pull.UP return d # ---------- program / set lists ---------- def rebuild_setlists(self): self.setlists = [{'title': t, 'items': it, 'builtin': True} for t, it in BUILTIN_SETLISTS] seen = set(_slkey(t) for t, _ in BUILTIN_SETLISTS) for t, it in load_user_setlists(): if _slkey(t) in seen: continue seen.add(_slkey(t)); self.setlists.append({'title': t, 'items': it, 'builtin': False}) if self.sl >= len(self.setlists): self.sl = 0 def switch_setlist(self, delta=1): if len(self.setlists) < 2: return if self._sync_applying: return was = self.running if was: self.running = False; self._log_play() self.sl = (self.sl + delta) % len(self.setlists) self.load(0) if was: self.running = True; self._reset_clock(); self._start_play() self.dirty = True self._sync_broadcast("sel=%d/%d" % (self.sl, self.idx)) def load(self, i): items = self.setlists[self.sl]['items'] self.idx = i % len(items) self.name, prog = items[self.idx] self.bpm, self.lanes, self.bars, self.ramp, self.trainer, self.rep, self.end = parse_program(prog) self._beat_ns = 60_000_000_000 // max(1, self.bpm); self._rebuild_dur_all() self.master = self.lanes[0]; self._ramp_base = self.bpm; self._lastbar = -1; self._muted = False self._next_pending = None self._reset_clock(); self.dirty = True def _prog_str(self): parts = ['t' + str(self.bpm)] if self.bars: parts.append('b' + str(self.bars)) if self.ramp: parts.append('rmp%d/%d/%d' % (self.ramp.get('start', self.bpm), self.ramp['amt'], self.ramp['every'])) if self.trainer: parts.append('tr%d/%d' % (self.trainer['play'], self.trainer['mute'])) for L in self.lanes: parts.append(lane_to_str(L)) if self.end is not None: if self.rep and self.rep > 1: parts.append('rep=' + str(self.rep)) parts.append('end=' + ('stop' if self.end == 'stop' else 'next' if self.end == 1 else ('+%d' % self.end if self.end > 0 else str(self.end)))) return ';'.join(parts) # ---------- per-lane step durations (cached tuple; no method call in tick) ---------- def _rebuild_dur(self, L): beat = self._beat_ns sub = max(1, L['sub']); steps = max(1, L['steps']) if L.get('poly') and self.lanes: m = self.lanes[0]; master_bar = beat * (m['steps'] // max(1, m['sub'])) d = master_bar // steps; L['durs'] = tuple(d for _ in range(steps)) elif L.get('swing') and sub % 2 == 0: pair = beat // max(1, sub // 2); lng = (pair * 2) // 3; sht = pair // 3 L['durs'] = tuple(lng if (s % sub) % 2 == 0 else sht for s in range(steps)) else: d = beat // sub; L['durs'] = tuple(d for _ in range(steps)) def _rebuild_dur_all(self): for L in self.lanes: self._rebuild_dur(L) def _reset_clock(self): now = time.monotonic_ns() for L in self.lanes: L['next'] = now; L['step'] = -1 self._m_steps = 0; self._seg_start = time.monotonic() def _regen_levels(self, L): # remote lane= deltas recompute default accents sub = L['sub']; groups = L['groups']; starts = set(); acc = 0 for gp in groups: starts.add(acc); acc += gp L['steps'] = sum(groups) * sub L['levels'] = [(2 if (i // sub) in starts else 1) if i % sub == 0 else 0 for i in range(L['steps'])] def _padbase(self, L, s): return 0 if L['mute'] else L['levels'][s] # ---------- audio (optional piezo only) ---------- def click(self, level): if self.spk is None: return self.spk.frequency = {2: 2300, 1: 1600, 3: 1050}.get(level, 1600) self.spk.duty_cycle = {2: 42000, 1: 30000, 3: 14000}.get(level, 30000) self._buzz_off = time.monotonic_ns() + 22_000_000 # ---------- live sync (HELLO/FULL/DELTA/BYE on SysEx 0x40-0x43; see src/livesync.js) ---------- def _sync_send(self, op, text): if self.midi is None: return b = bytearray((0xF0, 0x7D, op)) for c in text: v = ord(c); b.append(v if v < 0x80 else 0x3F) b.append(0xF7) try: self.midi.write(b) except Exception: pass def _sync_broadcast(self, evt): if not self._sync_armed or self._sync_applying or self.midi is None or self._fw_pushing: return text = "%s;%d;%s" % (self._sync_origin, self._sync_seq, evt); self._sync_seq += 1 self._sync_send(0x42, text) def _sync_broadcast_full(self): if not self._sync_armed or self.midi is None or self._fw_pushing: return try: patch = self._prog_str() except Exception: return text = "%s;%d;%d;%d;%d;%s" % (self._sync_origin, self._sync_seq, 1 if self.running else 0, self.sl, self.idx, patch) self._sync_seq += 1 self._sync_send(0x41, text) self._sync_heartbeat_next = time.monotonic() + 5.0 def _sync_apply_full(self, running, patch): self._sync_applying = True try: try: gc.collect() try: cur = self._prog_str() except Exception: cur = None if patch and patch != cur: bpm, lanes, bars, ramp, trainer, rep, end = parse_program(patch) self.bpm = bpm; self.lanes = lanes; self.bars = bars; self.ramp = ramp self.trainer = trainer; self.rep = rep; self.end = end self._beat_ns = 60_000_000_000 // max(1, bpm); self._rebuild_dur_all() self.master = self.lanes[0]; self._ramp_base = self.bpm; self._lastbar = -1; self._muted = False self._reset_clock(); self.dirty = True if running and not self.running: self.toggle() elif (not running) and self.running: self.toggle() except Exception as e: try: print("sync FULL apply:", e) except Exception: pass finally: self._sync_applying = False def _sync_apply_delta(self, evt): self._sync_applying = True try: eq = evt.find('=') key = evt if eq < 0 else evt[:eq] val = '' if eq < 0 else evt[eq+1:] if key == 'play': if not self.running: self.toggle() elif key == 'stop': if self.running: self.toggle() elif key == 'bpm': try: self.set_bpm(int(val)) except Exception: pass elif key == 'sel': p = val.split('/') if len(p) == 2: try: sl = int(p[0]); item = int(p[1]) if sl >= 0 and item >= 0: if sl < len(self.setlists) and sl != self.sl: self.sl = sl items = self.setlists[self.sl]['items'] if 0 <= item < len(items) and item != self.idx: self.goto(item) except Exception: pass elif key == 'beat': # PM_G-1 doesn't EMIT beat= (no on-device editing) but DOES apply p = val.split('/') if len(p) == 3: try: li = int(p[0]); s = int(p[1]); lvl = int(p[2]) if 0 <= li < len(self.lanes): L = self.lanes[li] if 0 <= s < len(L['levels']): L['levels'][s] = lvl & 3; self.dirty = True except Exception: pass elif key == 'lane': # apply but don't emit p = val.split('/') if len(p) >= 3: try: li = int(p[0]); field = p[1]; v = '/'.join(p[2:]) if 0 <= li < len(self.lanes): L = self.lanes[li]; structural = False if field == 'sound': L['sound'] = v elif field == 'groups': try: L['groups'] = [int(x) for x in v.split('+')]; structural = True except Exception: pass elif field == 'sub': try: L['sub'] = int(v); structural = True except Exception: pass elif field == 'swing': L['swing'] = (v == '1'); structural = True elif field == 'enabled': L['mute'] = not (v == '1') elif field == 'gain': try: L['gain'] = int(v) except Exception: pass elif field == 'poly': L['poly'] = (v == '1'); structural = True if structural: self._regen_levels(L) if li == 0 and structural: self._rebuild_dur_all() else: self._rebuild_dur(L) self.dirty = True except Exception: pass finally: self._sync_applying = False def midi_send(self, note, vel): if self.midi is None or self._fw_pushing: return # keep the bus quiet during a firmware push b = self._note_buf b[0] = 0x90 | ((MIDI_CHANNEL - 1) & 0x0F) b[1] = note & 0x7F; b[2] = vel & 0x7F try: self.midi.write(b) except Exception: pass # ---------- transport ---------- def toggle(self): self.running = not self.running if self.running: self._reset_clock(); self._start_play(); self._clock_next = time.monotonic_ns() if MIDI_CLOCK_OUT and MIDI_CLOCK_OUT_TRANSPORT and self.midi is not None: try: self.midi.write(self._start_byte) except Exception: pass else: if self.spk: self.spk.duty_cycle = 0 self._log_play() if MIDI_CLOCK_OUT and MIDI_CLOCK_OUT_TRANSPORT and self.midi is not None: try: self.midi.write(self._stop_byte) except Exception: pass self.dirty = True self._sync_broadcast("play" if self.running else "stop") def set_bpm(self, v): v = max(5, min(300, v)) if v != self.bpm: self.bpm = v; self._beat_ns = 60_000_000_000 // v self._rebuild_dur_all(); self.dirty = True self._bpm_flash = time.monotonic() + 0.7 # flash the tempo so the nudge is visible even in Grid/Pendulum self._sync_broadcast("bpm=%d" % v) def goto(self, i): was = self.running if was: self.running = False; self._log_play() self.load(i) if was: self.running = True; self._reset_clock(); self._start_play() self.dirty = True self._sync_broadcast("sel=%d/%d" % (self.sl, self.idx)) def tap(self): now = time.monotonic() if not hasattr(self, '_taps'): self._taps = [] self._taps = [t for t in self._taps if now - t < 2.4] self._taps.append(now) if len(self._taps) >= 2: span = (self._taps[-1] - self._taps[0]) / (len(self._taps) - 1) if span > 0: self.set_bpm(round(60 / span)) def cycle_view(self): self.view = (self.view + 1) % 3; self.dirty = True # ---------- scheduler (timing identical to the Explorer; display calls replaced by self.dirty) ---------- def tick(self): now = time.monotonic_ns() if self._buzz_off and now >= self._buzz_off: if self.spk: self.spk.duty_cycle = 0 self._buzz_off = 0 if self._slaved and (now - self._clock_in_last_t) > 1_000_000_000: self._slaved = False if self.running: fired_best = 0; fired_prio = -1 for li, L in enumerate(self.lanes): if self._advance: break adv = False while now >= L['next']: L['step'] = (L['step'] + 1) % L['steps'] if li == 0: self._m_steps += 1 nb = (self._m_steps - 1) // L['steps'] if nb != self._lastbar: self._lastbar = nb; self._on_new_bar(nb) if self._advance: break if self.ramp and L['steps'] > 0 and not self._slaved: mlen = L['steps']; bar_pos = self._m_steps / mlen seg_bar = (bar_pos % self.bars) if self.bars else bar_pos new_bpm = max(5, min(300, int(self._ramp_base + seg_bar / self.ramp['every'] * self.ramp['amt']))) if new_bpm != self.bpm: self.bpm = new_bpm; self._beat_ns = 60_000_000_000 // new_bpm; self._rebuild_dur_all() lvl = 0 if L['mute'] else L['levels'][L['step']] if lvl > 0: p = PRIO.get(lvl, 0) if p > fired_prio: fired_prio = p; fired_best = lvl if not self._muted: self.midi_send(SOUND_GM.get(L['sound'], GM_DEFAULT), MIDI_VEL.get(lvl, 90)) L['next'] += L['durs'][L['step']]; adv = True if adv: self.dirty = True if fired_best and not self._muted: self._beatflash = fired_best; self._beatflash_off = now + 70_000_000 if not MUTE_SPEAKER and not (SPEAKER_AUTO_MUTE and self.midi_host): self.click(fired_best) self.dirty = True if self._advance: self._advance = False; self._do_advance() if self.running and MIDI_CLOCK_OUT and self.midi is not None and not self._slaved and not self._fw_pushing: clk = self._clock_byte; tick_ns = self._beat_ns // 24 while now >= self._clock_next: try: self.midi.write(clk) except Exception: pass self._clock_next += tick_ns def _end_plan(self): end = self.end if end is None: if self.continue_on and self.bars: end = 1 else: return None cyc = self.bars if self.bars else 1 reps = self.rep if self.rep else 1 return (cyc * reps, end) def _goto_target(self, offset): items = self.setlists[self.sl]['items']; n = len(items) t = self.idx + offset return 0 if t < 0 else (t % n if t >= n else t) def _end_stop(self): self.running = False if self.spk: self.spk.duty_cycle = 0 self._log_play(); self.dirty = True; self._sync_broadcast("stop") def _on_new_bar(self, bar): plan = self._end_plan() if plan is not None and plan[1] != 'stop' and self._next_pending is None and bar == plan[0] - 1: self._prepare_next(self._goto_target(plan[1])) if self.bars and bar > 0 and bar % self.bars == 0: self._seg_start = time.monotonic() if plan is not None and bar > 0 and bar == plan[0]: action = plan[1] if not (self.bars and bar % self.bars == 0): self._seg_start = time.monotonic() if action == 'stop': self._end_stop() else: if self._next_pending is None: self._prepare_next(self._goto_target(action)) if self._next_pending is not None: self._seam_t = self.lanes[0]['next'] self._advance = True t = self.trainer self._muted = bool(t and (t['play'] + t['mute']) and (bar % (t['play'] + t['mute'])) >= t['play']) def _prepare_next(self, target=None): items = self.setlists[self.sl]['items'] nxt = (self.idx + 1) % len(items) if target is None else target if nxt == self.idx: return name, prog = items[nxt] gc.collect() try: bpm, lanes, bars, ramp, trainer, rep, end = parse_program(prog) except MemoryError: gc.collect(); return beat = 60_000_000_000 // max(1, bpm) for L in lanes: sub = max(1, L['sub']); steps = max(1, L['steps']) if L.get('poly'): m = lanes[0]; mbar = beat * (m['steps'] // max(1, m['sub'])) d = mbar // steps; L['durs'] = tuple(d for _ in range(steps)) elif L.get('swing') and sub % 2 == 0: pair = beat // max(1, sub // 2); lng = (pair * 2) // 3; sht = pair // 3 L['durs'] = tuple(lng if (s % sub) % 2 == 0 else sht for s in range(steps)) else: d = beat // sub; L['durs'] = tuple(d for _ in range(steps)) self._next_pending = {'lanes': lanes, 'bpm': bpm, 'bars': bars, 'ramp': ramp, 'trainer': trainer, 'name': name, 'idx': nxt, 'rep': rep, 'end': end} def _do_advance(self): n = self._next_pending if n is None: return self._next_pending = None self.lanes = n['lanes']; self.bpm = n['bpm']; self.bars = n['bars'] self.ramp = n['ramp']; self.trainer = n['trainer']; self.name = n['name']; self.idx = n['idx'] self.rep = n['rep']; self.end = n['end'] self._beat_ns = 60_000_000_000 // max(1, self.bpm); self._rebuild_dur_all() self._ramp_base = self.bpm; self._lastbar = -1; self._muted = False; self._m_steps = 0 seam = self._seam_t for L in self.lanes: L['next'] = seam; L['step'] = -1 self._seg_start = time.monotonic(); self.dirty = True # ---------- inputs (4 buttons, active-low) ---------- # A: tap = play/stop, hold (>=600ms) = cycle view. B: tap = next track, hold = next set list. # X / Y: tempo down / up (tap = +-1, auto-repeat while held, +-5 after 1.5s). def poll(self): now = time.monotonic_ns() a = self.btnA.value; b = self.btnB.value; x = self.btnX.value; y = self.btnY.value if (not a) and self._prev['A']: self._press['A'] = now if a and (not self._prev['A']): if now - self._press['A'] >= 600_000_000: self.cycle_view() else: self.toggle() if (not b) and self._prev['B']: self._press['B'] = now if b and (not self._prev['B']): if now - self._press['B'] >= 600_000_000: self.switch_setlist(1) else: self.goto(self.idx + 1) if (not x) and self._prev['X']: self._held_t['X'] = now; self._next_rep['X'] = now + 350_000_000; self.set_bpm(self.bpm - 1) elif (not x) and (not self._prev['X']) and now >= self._next_rep['X']: self._next_rep['X'] = now + 120_000_000 self.set_bpm(self.bpm + (-5 if (now - self._held_t['X']) > 1_500_000_000 else -1)) if (not y) and self._prev['Y']: self._held_t['Y'] = now; self._next_rep['Y'] = now + 350_000_000; self.set_bpm(self.bpm + 1) elif (not y) and (not self._prev['Y']) and now >= self._next_rep['Y']: self._next_rep['Y'] = now + 120_000_000 self.set_bpm(self.bpm + (5 if (now - self._held_t['Y']) > 1_500_000_000 else 1)) self._prev['A'] = a; self._prev['B'] = b; self._prev['X'] = x; self._prev['Y'] = y # USB-MIDI in: any byte = a host is listening (heartbeat); also assemble SysEx if self.midi_in is not None: try: n = self.midi_in.readinto(self._mbuf) except Exception: n = 0 if n: self.last_midi_in = time.monotonic(); self._feed_midi(self._mbuf, n) host = bool(self.last_midi_in) and (time.monotonic() - self.last_midi_in) < 1.0 if host != self.midi_host: self.midi_host = host if host and SPEAKER_AUTO_MUTE and self.spk: self.spk.duty_cycle = 0 # ---------- LED rendering ---------- def _lvl_bright(self, lvl): if lvl == 2: return BRIGHTNESS # accent if lvl == 1: return max(8, BRIGHTNESS // 4) # normal if lvl == 3: return max(3, BRIGHTNESS // 16) # ghost return 0 def _splash(self, text): # Scroll text across the matrix once at boot, right-to-left, as a 3x5 font on rows 1..5. # Doubles as a liveness + pixel-map check: if "PM-G1 GRID" reads correctly, the firmware # booted and the LED mapping is right. cols = [] for ch in text: g = DIGITS.get(ch) or LETTERS.get(ch.upper()) or LETTERS.get(' ') for cx in range(3): c = 0 for ry in range(5): if g[ry] & (1 << (2 - cx)): c |= (1 << ry) cols.append(c) cols.append(0) # 1px gap between glyphs n = len(cols); m = self.mtx; off = -16 while off < n: m.clear() for x in range(17): ci = x + off if 0 <= ci < n: c = cols[ci] for ry in range(5): if c & (1 << ry): m.set(x, ry + 1, BRIGHTNESS) m.show(); time.sleep(0.05); off += 1 def render(self): self.mtx.clear() v = self.view if v != 2 and self._bpm_flash and time.monotonic() < self._bpm_flash: v = 2 # transient tempo readout if v == 2: self._render_bpm() elif v == 1: self._render_pendulum() else: self._render_grid() self.mtx.show() def _render_grid(self): m = self.mtx; lanes = self.lanes n = min(len(lanes), 7) if n == 0: return y0 = (7 - n) // 2 # centre the lanes vertically for li in range(n): L = lanes[li]; steps = max(1, L['steps']); y = y0 + li lit = L['step'] if self.running else -1 off = (17 - steps) // 2 if steps <= 17 else 0 for s in range(steps): col = (s + off) if steps <= 17 else (s * 17) // steps lvl = 0 if L['mute'] else L['levels'][s] if s == lit: val = 255 if lvl else 70 # playhead: bright on a hit, a dim travelling dot on a rest else: val = self._lvl_bright(lvl) if val and val > m.get(col, y): m.set(col, y, val) def _render_pendulum(self): m = self.mtx if not self.lanes: return L = self.lanes[0]; steps = max(1, L['steps']) sub = max(1, L['sub']); beats = max(1, steps // sub) frac = (((self._m_steps - 1) % steps) / steps) if self.running else 0.0 tri = frac * 2 if frac < 0.5 else 2 * (1 - frac) # bounce 0..1..0 across the bar (metronome arm) col = int(tri * 16 + 0.5) flash = self._beatflash if (self._beatflash and time.monotonic_ns() < self._beatflash_off) else 0 val = 255 if flash == 2 else (150 if flash else 90) for y in range(7): m.set(col, y, val) for bi in range(beats): # faint beat ticks along the bottom edge bc = (bi * 17) // beats if m.get(bc, 6) < 24: m.set(bc, 6, 24) def _render_bpm(self): m = self.mtx; s = str(self.bpm)[-3:] w = len(s) * 4 - 1; x0 = (17 - w) // 2; y0 = 1 val = BRIGHTNESS if self.running else max(20, BRIGHTNESS // 2) for i, ch in enumerate(s): g = DIGITS.get(ch) if not g: continue bx = x0 + i * 4 for ry in range(5): row = g[ry] for rx in range(3): if row & (1 << (2 - rx)): m.set(bx + rx, y0 + ry, val) # ---------- USB-MIDI in: SysEx assembler (clock + editor-pushed programs + live-sync) ---------- def _feed_midi(self, buf, n): now_ns = time.monotonic_ns() if MIDI_CLOCK_IN else 0 for i in range(n): b = buf[i] if b == 0xF0: self._sx = bytearray(); self._sxon = True elif b == 0xF7: if self._sxon: self._handle_sysex(self._sx) self._sxon = False elif b == 0xF8 and MIDI_CLOCK_IN: self._slave_tick(now_ns) elif b == 0xFA and MIDI_CLOCK_IN_TRANSPORT and MIDI_CLOCK_IN: self._slave_start() elif b == 0xFB and MIDI_CLOCK_IN_TRANSPORT and MIDI_CLOCK_IN: self._slave_start() elif b == 0xFC and MIDI_CLOCK_IN_TRANSPORT and MIDI_CLOCK_IN: self._slave_stop() elif b >= 0xF8: pass elif self._sxon: if len(self._sx) < 60000: self._sx.append(b) else: self._sxon = False def _slave_tick(self, now_ns): if self._clock_in_last_t == 0: self._clock_in_last_t = now_ns; self._slaved = True; return interval = now_ns - self._clock_in_last_t self._clock_in_last_t = now_ns if interval < 8_300_000 or interval > 500_000_000: return if self._clock_in_avg == 0: self._clock_in_avg = interval else: self._clock_in_avg = (self._clock_in_avg * 7 + interval) // 8 new_bpm = max(5, min(300, int(60_000_000_000 // (self._clock_in_avg * 24)))) if new_bpm != self.bpm: self.bpm = new_bpm; self._beat_ns = 60_000_000_000 // new_bpm; self._rebuild_dur_all() self._slaved = True def _slave_start(self): if not self.running: self.running = True; self._reset_clock(); self._start_play(); self.dirty = True self._clock_in_last_t = 0; self._clock_in_avg = 0 def _slave_stop(self): if self.running: self.running = False if self.spk: self.spk.duty_cycle = 0 self._log_play(); self.dirty = True self._clock_in_last_t = 0; self._clock_in_avg = 0; self._slaved = False def _handle_sysex(self, sx): if len(sx) < 2 or sx[0] != 0x7D: return cmd = sx[1] if cmd == 0x01 and len(sx) >= 8 and rtc is not None: try: rtc.RTC().datetime = time.struct_time((2000 + sx[2], sx[3], sx[4], sx[5], sx[6], sx[7], 0, -1, -1)) except Exception: pass elif cmd == 0x02: # version query -> reply 0x03 + "G;" if self.midi: payload = DEVICE_ID + ";" + APP_VERSION self.midi.write(bytes([0xF0, 0x7D, 0x03]) + payload.encode() + bytes([0xF7])) elif cmd == 0x40 or cmd == 0x41 or cmd == 0x42 or cmd == 0x43: try: text = "".join(chr(b) if 0x20 <= b < 0x7F else "" for b in sx[2:]) except Exception: return origin = text.split(";", 1)[0] if text else "" if origin == self._sync_origin: return self._sync_armed = True if cmd == 0x40: self._sync_broadcast_full() elif cmd == 0x43: self._sync_armed = False elif cmd == 0x41: parts = text.split(";", 5) if len(parts) >= 6: try: running = parts[2] == "1"; patch = parts[5] self._sync_apply_full(running, patch) except Exception: pass elif cmd == 0x42: parts = text.split(";", 2) if len(parts) >= 3: self._sync_apply_delta(parts[2]) elif cmd == 0x10: try: with open("/programs.json", "wb") as f: f.write(bytes(sx[2:])) self.rebuild_setlists(); self.load(0) self._ack(True) except Exception: self._ack(False) elif cmd == 0x21: try: try: self._fw.close() except Exception: pass self._fw = open("/app.new", "wb"); self._fw_n = 0 self._fw_pushing = True self._ack(True) except Exception: self._fw = None; self._fw_pushing = False; self._ack(False) elif cmd == 0x22: try: if self._fw is None or a2b_base64 is None: raise OSError() self._fw.write(a2b_base64(bytes(sx[2:]))) self._fw.flush(); self._fw_n += 1 gc.collect() self._ack(True) except Exception: try: self._fw.close() except Exception: pass self._fw = None; self._fw_pushing = False; self._ack(False) elif cmd == 0x23: try: try: self._fw.close() except Exception: pass self._fw = None; gc.collect() with open("/app.new", "rb") as f: head = f.read(2) if os.stat("/app.new")[6] < 4000 or len(head) < 2 or head[0] != 0x43 or head[1] != 0x06: try: os.remove("/app.new") except OSError: pass self._fw_pushing = False; self._ack(False); return try: os.remove("/app.bak") except OSError: pass os.rename("/app.mpy", "/app.bak") os.rename("/app.new", "/app.mpy") open("/trial", "w").close() self._fw_pushing = False self._ack(True); time.sleep(0.4); supervisor.reload() except Exception: self._fw_pushing = False; self._ack(False) def _ack(self, ok): if self.midi: self.midi.write(bytes([0xF0, 0x7D, 0x7F if ok else 0x7E, 0xF7])) # ---------- practice log (saved to /history.json) ---------- def _probe_write(self): try: with open("/.wtest", "w") as f: f.write("1") try: os.remove("/.wtest") except Exception: pass return True except OSError: return False def _load_settings(self): global MUTE_SPEAKER, SPEAKER_AUTO_MUTE, MIDI_ENABLED, MIDI_CHANNEL, MIDI_CLOCK_OUT, MIDI_CLOCK_IN, BRIGHTNESS try: with open("/settings.json") as f: d = json.load(f) except Exception: return try: sm = d.get("speaker", "auto") MUTE_SPEAKER = (sm == "off"); SPEAKER_AUTO_MUTE = (sm == "auto") MIDI_ENABLED = bool(d.get("midi_out", MIDI_ENABLED)) MIDI_CHANNEL = max(1, min(16, int(d.get("midi_channel", MIDI_CHANNEL)))) MIDI_CLOCK_OUT = bool(d.get("clock_out", MIDI_CLOCK_OUT)) MIDI_CLOCK_IN = bool(d.get("clock_in", MIDI_CLOCK_IN)) BRIGHTNESS = max(16, min(255, int(d.get("brightness", BRIGHTNESS)))) except Exception as e: print("settings:", e) def _load_log(self): try: with open("/history.json") as f: return json.load(f).get("log", []) except Exception: return [] def _save_log(self): if not self.can_write: return try: with open("/history.json", "w") as f: json.dump({"log": self.log[:200]}, f) except OSError: self.can_write = False def _start_play(self): self.play_start = time.monotonic(); self.play_bpm = self.bpm; self.play_name = self.name def _log_play(self): if self.play_start is None: return dur = int(time.monotonic() - self.play_start); self.play_start = None if dur < MIN_LOG_SEC: return mlen = self.lanes[0]['steps'] if self.lanes else 1 t = time.localtime() self.log.insert(0, {"t": "%02d:%02d" % (t.tm_hour, t.tm_min), "bpm": self.play_bpm, "dur": dur, "bars": self._m_steps // max(1, mlen), "name": self.play_name}) del self.log[200:] self._save_log() def run(self): boot = time.monotonic() try: os.stat("/trial"); committed = False except OSError: committed = True try: self._splash("PM-G1 GRID") # boot banner (scrolls once); wrapped so a splash bug never blocks the app except Exception: pass next_frame = 0.0 while True: try: self.tick(); self.poll() tnow = time.monotonic() if not committed and tnow - boot > 5: try: os.remove("/trial") except Exception: pass committed = True if self._sync_armed and tnow >= self._sync_heartbeat_next: self._sync_broadcast_full() if self.running and tnow >= next_frame: # keep pendulum/playhead moving even with no input self.dirty = True; next_frame = tnow + 0.04 if self._bpm_flash: # keep rendering through the tempo flash, then one frame to revert if tnow >= self._bpm_flash: self._bpm_flash = 0 self.dirty = True if self.dirty: self.dirty = False; self.render() time.sleep(0.0005) except MemoryError: gc.collect(); time.sleep(0.05) except Exception as e: try: print("tick error:", e) except Exception: pass time.sleep(0.05) App().run()