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feature/unit/MIDI sound systems, built-in SAM2695 audio synthesizer
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‎m5stack/libs/unit/__init__.py

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"DAC2Unit": "dac2",
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"GESTUREUnit": "gesture",
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"THERMALUnit": "thermal",
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"SYNTHUnit": "synth",
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"SERVOS8Unit": "servos8",
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"RTC8563Unit": "rtc8563",
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"VMeterUnit": "vmeter",
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"AMeterUnit": "ameter",
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}
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‎m5stack/libs/unit/manifest.py

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"scales.py",
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"gesture.py",
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"thermal.py",
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"synth.py",
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"servos8.py",
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"rtc8563.py",
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"vmeter.py",
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"ameter.py",
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),
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base_path="..",
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opt=0,

‎m5stack/libs/unit/synth.py

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'''
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Refer to https://github.com/fluxly/Fluxamasynth.
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'''
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from machine import UART, Pin
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MIDI_CMD_NOTE_OFF = 0x80 # Note Off
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MIDI_CMD_NOTE_ON = 0x90 # Note On
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MIDI_CMD_POLYPHONIC_AFTERTOUCH = 0xA0 # Polyphonic Aftertouch (or Key Pressure)
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MIDI_CMD_CONTROL_CHANGE = 0xB0 # Control Change (or Channel Mode Message)
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MIDI_CMD_PROGRAM_CHANGE = 0xC0 # Program Change
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MIDI_CMD_CHANNEL_AFTERTOUCH = 0xD0 # Channel Aftertouch (or Channel Pressure)
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MIDI_CMD_PITCH_BEND = 0xE0 # Pitch Bend
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MIDI_CMD_SYSTEM_EXCLUSIVE = 0xF0 # System Exclusive (SysEx) Start
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MIDI_CMD_TIME_CODE = 0xF1 # MIDI Time Code Quarter Frame
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MIDI_CMD_SONG_POSITION = 0xF2 # Song Position Pointer
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MIDI_CMD_SONG_SELECT = 0xF3 # Song Select
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MIDI_CMD_TUNE_REQUEST = 0xF6 # Tune Request
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MIDI_CMD_END_OF_SYSEX = 0xF7 # End of SysEx
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MIDI_CMD_TIMING_CLOCK = 0xF8 # Timing Clock (used in System Real-Time Messages)
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MIDI_CMD_START = 0xFA # Start (used in System Real-Time Messages)
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MIDI_CMD_CONTINUE = 0xFB # Continue (used in System Real-Time Messages)
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MIDI_CMD_STOP = 0xFC # Stop (used in System Real-Time Messages)
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MIDI_CMD_ACTIVE_SENSING = 0xFE # Active Sensing (used in System Real-Time Messages)
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MIDI_CMD_SYSTEM_RESET = 0xFF # System Reset
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DRUM_SET ={ "Closed Hi Hat [EXC1]" :[27, 49],
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"Pedal Hi-Hat [EXC1]" :[28, 49],
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"Open Hi Hat [EXC1]" :[29, 49],
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"Ride Cymbal" :[30, 49],
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"Kick drum2" :[35, 1],
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"Jazz BD 2" :[35, 41],
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"Kick drum" :[35, 128],
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"Kick drum1" :[36, 1],
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"Jazz BD 1" :[36, 41],
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# "Kick drum" :[36, 128],
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"Side Stick" :[37, 1],
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"Rim Shot" :[37, 128],
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"Snare Drum 1" :[38, 1],
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"Gated Snare" :[38, 17],
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"Brush Tap" :[38, 41],
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"Snare Drum 2" :[38, 49],
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"Snare Drum" :[38, 128],
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"Hand Clap" :[39, 1],
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"Brush Slap" :[39, 41],
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"Castanets" :[39, 49],
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"Hand Clap" :[39, 128],
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"Snare Drum 2" :[40, 1],
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"Brush Swirl" :[40, 41],
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"Snare Drum 2" :[40, 49],
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"Elec Snare Drum" :[40, 128],
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"Low Floor Tom" :[41, 1],
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"Timpani F" :[41, 49],
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"Acoustic Low Tom" :[41, 128],
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"Closed Hi Hat [EXC1]" :[42, 1],
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"Timpani F#" :[42, 49],
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"Closed Hi-Hat [Exc1]" :[42, 128],
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"High Floor Tom" :[43, 49],
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"Timpani G" :[43, 49],
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"Acoustic Low Tom" :[43, 128],
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"Pedal Hi-Hat [EXC1]" :[44, 1],
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"Timpani G#" :[44, 49],
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"Open Hi-Hat 2" :[44, 128],
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"Low Tom" :[45, 1],
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"Timpani A" :[45, 49],
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"Acoustic Middle Tom" :[45, 128],
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"Open Hi-Hat [EXC1]" :[46, 1],
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"Timpani A#" :[46, 49],
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"Open Hi-Hat 1 [Exc1]" :[46, 128],
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"Low-Mid Tom" :[47, 1],
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"Timpani B" :[47, 49],
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"Acoustic Middle Tom" :[47, 128],
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"Hi Mid Tom" :[48, 1],
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"Timpani c" :[48, 49],
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"Acoustic High Tom" :[48, 128],
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"Crash Cymbal 1" :[49, 1],
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"Timpani c#" :[49, 49],
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"Crash Cymbal" :[49, 128],
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"High Tom" :[50, 1],
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"Timpani d" :[50, 49],
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"Acoustic High Tom" :[50, 128],
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"Ride Cymbal 1" :[51, 1],
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"Timpani d#" :[51, 49],
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"Ride Cymbal" :[51, 128],
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"Chinese Cymbal" :[52, 1],
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"Timpani e" :[52, 49],
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"Ride Bell" :[53, 1],
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"Timpani f" :[53, 49],
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"Tambourine" :[54, 1],
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# "Tambourine" :[54, 128],
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"Splash Cymbal" :[55, 1],
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"Cowbell" :[56, 1],
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# "Cowbell" :[56, 128],
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"Crash Cymbal 2" :[57, 1],
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"Vibraslap" :[58, 1],
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"Ride Cymbal 2" :[59, 1],
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"Hi Bongo" :[60, 1],
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"Low Bongo" :[61, 1],
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"Mute Hi Conga" :[62, 1],
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"Open Hi Conga" :[63, 1],
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"Low Conga" :[64, 1],
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"High Timbale" :[65, 1],
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"Low Timbale" :[66, 1],
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"High Agogo" :[67, 1],
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"Low Agogo" :[68, 1],
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"Cabasa" :[69, 1],
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"Maracas" :[70, 1],
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"Short Whistle[EXC2]" :[71, 1],
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"Long Whistle[EXC2]" :[72, 1],
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"Short Guiro [EXC3]" :[73, 1],
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"Vibra Slap" :[73, 128],
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"Long Guiro [EXC3]" :[74, 1],
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"Claves" :[75, 1],
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# "Claves" :[75, 128],
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"Hi Wood Block" :[76, 1],
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"Low Wood Block" :[77, 1],
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"Mute Cuica [EXC4]" :[78, 1],
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"Open Cuica [EXC4]" :[79, 1],
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"Mute Triangle [EXC5]" :[80, 1],
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"Open Triangle[EXC5]" :[81, 1],
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"Applauses" :[82, 128],
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# "Applauses" :[88, 49],
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"Helicopter" :[94, 127],
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"Gun Shot" :[96, 127],
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"Birds" :[102, 127],
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"SeaShore" :[106, 127],
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}
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class SYNTHUnit:
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def __init__(self, port, port_id=1):
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Pinx = Pin(port[0], Pin.IN, Pin.PULL_UP)
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self._uart = UART(port_id, tx=port[1], rx=port[0])
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self._uart.init(31250, bits=8, parity=None, stop=1)
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def set_note_on(self, channel, pitch, velocity):
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cmd = [MIDI_CMD_NOTE_ON | (channel & 0x0f), pitch, velocity]
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self.cmd_write(cmd)
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def set_note_off(self, channel, pitch):
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cmd = [MIDI_CMD_NOTE_OFF | (channel & 0x0f), pitch, 0x00]
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self.cmd_write(cmd)
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def set_instrument(self, bank, channel, value):
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cmd = [MIDI_CMD_CONTROL_CHANGE | (channel & 0x0f), 0x00, bank]
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self.cmd_write(cmd)
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cmd = [MIDI_CMD_PROGRAM_CHANGE | (channel & 0x0f), value]
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self.cmd_write(cmd)
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def set_drums_instrument(self, drum_pitch, velocity):
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self.set_instrument(0, 9, DRUM_SET[drum_pitch][1])
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self.set_note_on(9, DRUM_SET[drum_pitch][0], velocity)
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def set_pitch_bend(self, channel, value):
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value = self.map(value, 0, 1023, 0, 0x3fff)
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cmd = [MIDI_CMD_PITCH_BEND | (channel & 0x0f), (value & 0xef), ((value >> 7) & 0xff)]
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self.cmd_write(cmd)
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def set_pitch_bend_range(self, channel, value):
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cmd = [MIDI_CMD_CONTROL_CHANGE | (channel & 0x0f), 0x65, 0x00, 0x64, 0x00, 0x06, (value & 0x7f)]
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self.cmd_write(cmd)
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def midi_reset(self):
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self.cmd_write([MIDI_CMD_SYSTEM_RESET])
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def set_channel_volume(self, channel, level):
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cmd = [MIDI_CMD_CONTROL_CHANGE | (channel & 0x0f), 0x07, level]
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self.cmd_write(cmd)
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def set_all_notes_off(self, channel):
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cmd = [MIDI_CMD_CONTROL_CHANGE | (channel & 0x0f), 0x7b, 0x00]
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self.cmd_write(cmd)
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def set_master_volume(self, level):
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cmd = [MIDI_CMD_SYSTEM_EXCLUSIVE, 0x7f, 0x7f, 0x04, 0x01, 0x00, (level & 0x7f), MIDI_CMD_END_OF_SYSEX]
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self.cmd_write(cmd)
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def set_reverb(self, channel, program, level, delayfeedback):
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cmd = [MIDI_CMD_CONTROL_CHANGE | (channel & 0x0f), 0x50, (program & 0x07)]
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self.cmd_write(cmd)
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cmd = [MIDI_CMD_CONTROL_CHANGE | (channel & 0x0f), 0x5b, (level & 0x7f)]
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self.cmd_write(cmd)
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if delayfeedback > 0:
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cmd=[MIDI_CMD_SYSTEM_EXCLUSIVE, 0x41, 0x00, 0x42, 0x12, 0x40, 0x01, 0x35, (delayfeedback & 0x7f), 0x00, MIDI_CMD_END_OF_SYSEX]
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self.cmd_write(cmd)
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def set_chorus(self, channel, program, level, feedback, chorusdelay):
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cmd = [MIDI_CMD_CONTROL_CHANGE | (channel & 0x0f), 0x51, (program & 0x07)]
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self.cmd_write(cmd)
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cmd = [MIDI_CMD_CONTROL_CHANGE | (channel & 0x0f), 0x5d, (level & 0x7f)]
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self.cmd_write(cmd)
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if feedback > 0:
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cmd=[MIDI_CMD_SYSTEM_EXCLUSIVE, 0x41, 0x00, 0x42, 0x12, 0x40, 0x01, 0x3b, (feedback & 0x7f), 0x00, MIDI_CMD_END_OF_SYSEX]
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self.cmd_write(cmd)
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if chorusdelay > 0:
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cmd=[MIDI_CMD_SYSTEM_EXCLUSIVE, 0x41, 0x00, 0x42, 0x12, 0x40, 0x01, 0x3c, (feedback & 0x7f), 0x00, MIDI_CMD_END_OF_SYSEX]
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self.cmd_write(cmd)
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def set_pan(self, channel, value):
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cmd = [MIDI_CMD_CONTROL_CHANGE | (channel & 0x0f), 0x0A, value]
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self.cmd_write(cmd)
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def set_equalizer(self, channel, lowband, medlowband, medhighband, highband,
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lowfreq, medlowfreq, medhighfreq, highfreq):
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cmd = [MIDI_CMD_CONTROL_CHANGE | (channel & 0x0f), 0x63, 0x37, 0x62, 0x00, 0x06, (lowband & 0x7f)]
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self.cmd_write(cmd)
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cmd[4] = 0x01
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cmd[6] = (medlowband & 0x7f)
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self.cmd_write(cmd)
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cmd[4] = 0x02
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cmd[6] = (medhighband & 0x7f)
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self.cmd_write(cmd)
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cmd[4] = 0x03
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cmd[6] = (highband & 0x7f)
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self.cmd_write(cmd)
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cmd[4] = 0x08
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cmd[6] = (lowfreq & 0x7f)
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self.cmd_write(cmd)
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cmd[4] = 0x09
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cmd[6] = (medlowfreq & 0x7f)
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self.cmd_write(cmd)
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cmd[4] = 0x0A
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cmd[6] = (medhighfreq & 0x7f)
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self.cmd_write(cmd)
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cmd[4] = 0x0B
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cmd[6] = (highfreq & 0x7f)
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self.cmd_write(cmd)
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def set_tuning(self, channel, fine, coarse):
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cmd = [MIDI_CMD_CONTROL_CHANGE | (channel & 0x0f), 0x65, 0x00, 0x64, 0x01, 0x06, (fine & 0x7f)]
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self.cmd_write(cmd)
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cmd[4] = 0x02
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cmd[6] = (coarse & 0x7f)
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self.cmd_write(cmd)
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def set_vibrate(self, channel, rate, depth, delay):
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cmd = [MIDI_CMD_CONTROL_CHANGE | (channel & 0x0f), 0x63, 0x01, 0x62, 0x08, 0x06, (rate & 0x7f)]
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self.cmd_write(cmd)
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cmd[4] = 0x09
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cmd[6] = (depth & 0x7f)
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self.cmd_write(cmd)
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cmd[4] = 0x0A
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cmd[6] = (delay & 0x7f)
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self.cmd_write(cmd)
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def set_tvf(self, channel, cutoff, resonance):
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cmd = [MIDI_CMD_CONTROL_CHANGE | (channel & 0x0f), 0x63, 0x01, 0x62, 0x20, 0x06, (cutoff & 0x7f)]
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self.cmd_write(cmd)
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cmd[4] = 0x21
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cmd[6] = (resonance & 0x7f)
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self.cmd_write(cmd)
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def set_envelope(self, channel, attack, decay, release):
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cmd = [MIDI_CMD_CONTROL_CHANGE | (channel & 0x0f), 0x63, 0x01, 0x62, 0x63, 0x06, (attack & 0x7f)]
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self.cmd_write(cmd)
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cmd[4] = 0x64
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cmd[6] = (decay & 0x7f)
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self.cmd_write(cmd)
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cmd[4] = 0x66
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cmd[6] = (release & 0x7f)
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self.cmd_write(cmd)
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def set_scale_tuning(self, channel, v1, v2, v3, v4, v5, v6,
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v7, v8, v9, v10, v11, v12):
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cmd = [MIDI_CMD_CONTROL_CHANGE, 0x41, 0x00, 0x42, 0x12, 0x40, 0x10 | (channel & 0x0f), 0x40,
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v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, MIDI_CMD_END_OF_SYSEX]
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self.cmd_write(cmd)
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def set_mod_wheel(self, channel, pitch, tvtcutoff, amplitude, rate, pitchdepth, tvfdepth, tvadepth):
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cmd = [MIDI_CMD_CONTROL_CHANGE, 0x41, 0x00, 0x42, 0x12, 0x40, 0x20 | (channel & 0x0f), 0x00, pitch, 0x00, MIDI_CMD_END_OF_SYSEX]
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self.cmd_write(cmd)
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cmd[8] = 0x01
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cmd[9] = tvtcutoff
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self.cmd_write(cmd)
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cmd[8] = 0x02
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cmd[9] = amplitude
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self.cmd_write(cmd)
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cmd[8] = 0x03
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cmd[9] = rate
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self.cmd_write(cmd)
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cmd[8] = 0x04
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cmd[9] = pitchdepth
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self.cmd_write(cmd)
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cmd[8] = 0x05
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cmd[9] = tvfdepth
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self.cmd_write(cmd)
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cmd[8] = 0x06
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cmd[9] = tvadepth
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self.cmd_write(cmd)
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def set_all_drums(self):
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cmd = [MIDI_CMD_CONTROL_CHANGE, 0x41, 0x00, 0x42, 0x12, 0x40, 0x10, 0x15, 0x01, 0x00, MIDI_CMD_END_OF_SYSEX]
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self.cmd_write(cmd)
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for i in range(1, 15):
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cmd[6] = i
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self.cmd_write(cmd)
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def cmd_write(self, cmd):
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self._uart.write(bytes(cmd))
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def map(self, x, in_min, in_max, out_min, out_max):
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return round((x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min)
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