updated Faderwave code
This commit is contained in:
John Park
parent
4005e5f2bd
commit
458db753e0
1 changed files with 47 additions and 28 deletions
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@ -5,16 +5,16 @@
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use 16 faders to create the single cycle waveform
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rotary encoder adjusts other synth parameters
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audio output: line level over 3.5mm TRS
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CV output via DAC '''
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optional CV output via DAC '''
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import board
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import busio
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import ulab.numpy as np
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import rotaryio
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import neopixel
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from digitalio import DigitalInOut, Pull
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import displayio
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from adafruit_display_text import label
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from adafruit_display_shapes.rect import Rect
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import terminalio
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import synthio
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import audiomixer
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@ -30,10 +30,12 @@ from adafruit_midi.note_off import NoteOff
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displayio.release_displays()
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DEBUG = False # turn on print debugging messages
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ITSY_TYPE = 0 # Pick your ItsyBitsy: 0=M4, 1=RP2040
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# neopixel setup for RP2040 only
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if ITSY_TYPE == 1:
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import neopixel
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pixel = neopixel.NeoPixel(board.NEOPIXEL, 1, brightness=0.3)
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pixel.fill(0x004444)
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@ -42,8 +44,8 @@ i2c = busio.I2C(board.SCL, board.SDA, frequency=1_000_000)
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midi = adafruit_midi.MIDI(midi_in=usb_midi.ports[0], in_channel=0)
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NUM_FADERS = 16
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num_oscs = 2 # how many oscillators for each note
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detune = 0.003 # how much to detune the oscillators
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num_oscs = 1 # how many oscillators for each note to start
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detune = 0.000 # how much to detune the oscillators
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volume = 0.6 # mixer volume
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lpf_freq = 12000 # user Low Pass Filter frequency setting
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lpf_basef = 500 # filter lowest frequency
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@ -54,7 +56,7 @@ last_faders_pos = [0] * NUM_FADERS
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# Initialize ADS7830
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adc_a = ADC.ADS7830(i2c, address=0x48) # default address 0x48
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adc_b = ADC.ADS7830(i2c, address=0x4A) # A0 jumper 0x49, A1 0x4A
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adc_b = ADC.ADS7830(i2c, address=0x49) # A0 jumper 0x49, A1 0x4A
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faders = [] # list for fader objects on first ADC
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for fdr in range(8): # add first group to list
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@ -92,42 +94,46 @@ display = adafruit_displayio_ssd1306.SSD1306(display_bus, width=128, height=64)
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# Create display group
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group = displayio.Group()
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# Create background rectangle
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# bg_rect = Rect(0, 0, display.width, display.height, fill=0x0)
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# group.append(bg_rect)
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# Set the font for the text label
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font = terminalio.FONT
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# Create text label
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title = label.Label(font, x=2, y=4, text=("Faderwave Synthesizer"), color=0xffffff)
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title = label.Label(font, x=2, y=4, text=("FADERWAVE SYNTHESIZER"), color=0xffffff)
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group.append(title)
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title2 = label.Label(font, x=2, y=10, text=("---------------------"), color=0xffffff)
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group.append(title2)
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column_x = (8, 60, 100)
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row_y = (22, 34, 46, 58)
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column_x = (20, 90)
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row_y = (22, 34, 48, 60)
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midi_lbl_rect = Rect(column_x[2]-3, row_y[0]-5, 28, 10, fill=0xffffff)
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group.append(midi_lbl_rect)
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midi_lbl = label.Label(font, x=column_x[2], y=row_y[0], text="MIDI", color=0x000000)
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group.append(midi_lbl)
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midi_rect = Rect(column_x[2]-3, row_y[1]-5, 28, 10, fill=0xffffff)
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group.append(midi_rect)
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midi_counter_lbl = label.Label(font, x=column_x[2]+8, y=row_y[1], text='-', color=0x000000)
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group.append(midi_counter_lbl)
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# Create menu selector
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menu_sel = 0
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menu_sel_txt = label.Label(font, text=("->"), color=0xffffff)
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menu_sel_txt.x = column_x[0]-16
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menu_sel_txt = label.Label(font, text=(">"), color=0xffffff)
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menu_sel_txt.x = column_x[0]-10
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menu_sel_txt.y = row_y[menu_sel]
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group.append(menu_sel_txt)
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# Create detune text
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det_txt_a = label.Label(font, text=("Detune....."), color=0xffffff)
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det_txt_a = label.Label(font, text=("Detune "), color=0xffffff)
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det_txt_a.x = column_x[0]
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det_txt_a.y = row_y[0]
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group.append(det_txt_a)
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det_txt_b = label.Label(font, text=(str(0.003)), color=0xffffff)
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det_txt_b = label.Label(font, text=(str(detune)), color=0xffffff)
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det_txt_b.x = column_x[1]
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det_txt_b.y = row_y[0]
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group.append(det_txt_b)
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# Create number of oscs text
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num_oscs_txt_a = label.Label(font, text=("Num Oscs..."), color=0xffffff)
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num_oscs_txt_a = label.Label(font, text=("Num Oscs "), color=0xffffff)
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num_oscs_txt_a.x = column_x[0]
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num_oscs_txt_a.y = row_y[1]
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group.append(num_oscs_txt_a)
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@ -138,7 +144,7 @@ num_oscs_txt_b.y = row_y[1]
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group.append(num_oscs_txt_b)
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# Create volume text
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vol_txt_a = label.Label(font, text=("Volume....."), color=0xffffff)
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vol_txt_a = label.Label(font, text=("Volume "), color=0xffffff)
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vol_txt_a.x = column_x[0]
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vol_txt_a.y = row_y[2]
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group.append(vol_txt_a)
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@ -148,9 +154,8 @@ vol_txt_b.x = column_x[1]
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vol_txt_b.y = row_y[2]
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group.append(vol_txt_b)
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# Create lpf frequency text
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lpf_txt_a = label.Label(font, text=("LPF........"), color=0xffffff)
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lpf_txt_a = label.Label(font, text=("LPF "), color=0xffffff)
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lpf_txt_a.x = column_x[0]
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lpf_txt_a.y = row_y[3]
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group.append(lpf_txt_a)
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@ -160,7 +165,6 @@ lpf_txt_b.x = column_x[1]
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lpf_txt_b.y = row_y[3]
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group.append(lpf_txt_b)
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# Show the display group
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display.root_group = group
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@ -185,7 +189,7 @@ amp_env = synthio.Envelope(attack_time=0.3, attack_level=1, sustain_level=0.65,
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def faders_to_wave():
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for j in range(NUM_FADERS):
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wave_user[j] = int(map_range(faders_pos[j], 0, 255, -32768, 32767))
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wave_user[j] = int(map_range(faders_pos[j], 0, 127, -32768, 32767))
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notes_pressed = {} # which notes being pressed. key=midi note, val=note object
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@ -198,6 +202,7 @@ def note_on(n):
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f = fo * (1 + k*detune)
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voices.append(synthio.Note(frequency=f, filter=lpf, envelope=amp_env, waveform=wave_user))
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synth.press(voices)
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note_off(n) # help to prevent double note_on for same note which can get stuck
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notes_pressed[n] = voices
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def note_off(n):
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@ -209,25 +214,39 @@ def note_off(n):
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def map_range(s, a1, a2, b1, b2):
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return b1 + ((s - a1) * (b2 - b1) / (a2 - a1))
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notes_on = 0
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print("Welcome to Faderwave")
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while True:
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# get midi messages
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msg = midi.receive()
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if isinstance(msg, NoteOn) and msg.velocity != 0:
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note_on(msg.note)
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elif isinstance(msg, NoteOff) or isinstance(msg, NoteOn) and msg.velocity == 0:
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notes_on = notes_on + 1
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if DEBUG:
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print("MIDI notes on: ", msg.note, " Polyphony:", " "*notes_on, notes_on)
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midi_counter_lbl.text = str(msg.note)
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elif isinstance(msg, NoteOff) or (isinstance(msg, NoteOn) and msg.velocity == 0):
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note_off(msg.note)
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notes_on = notes_on - 1
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if DEBUG:
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print("MIDI notes off:", msg.note, " Polyphony:", " "*notes_on, notes_on)
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midi_counter_lbl.text = "-"
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# check faders
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for i in range(len(faders)):
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faders_pos[i] = faders[i].value//256
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faders_pos[i] = faders[i].value//512
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if faders_pos[i] is not last_faders_pos[i]:
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faders_to_wave()
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last_faders_pos[i] = faders_pos[i]
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if DEBUG:
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print("fader", [i], faders_pos[i])
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# send out a DAC value based on fader 0
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if i == 0:
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dac.value = faders[0].value
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# if i == 1:
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# dac.value = faders[1].value
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# check encoder button
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button.update()
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@ -247,7 +266,7 @@ while True:
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elif menu_sel == 1:
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num_oscs = num_oscs + delta
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num_oscs = min(max(num_oscs, 1), 8)
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num_oscs = min(max(num_oscs, 1), 5)
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formatted_num_oscs = str(num_oscs)
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num_oscs_txt_b.text = formatted_num_oscs
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