metronome first commit

Author: jedgarpark

CLUE_Metronome/clue_metronome.py

@@ -0,0 +1,209 @@
+import time
+import array
+import math
+import board
+from audiocore import RawSample
+import audiopwmio
+import displayio
+import terminalio
+from adafruit_display_text import label
+from adafruit_display_shapes.rect import Rect
+from adafruit_display_shapes.circle import Circle
+from adafruit_clue import clue
+
+blink_dot = False  # optional blinking dot on accent
+blink_light = True  # optional flashing backlight on accent
+tempo = 120  # in bpm
+print("BPM: {}".format(tempo))
+time_signature = 4  # Beats per measure
+BEEP_DURATION = 0.05
+delay = 60 / tempo
+
+# constants for sine wave generation
+SIN_LENGTH = 100  # more is less choppy
+SIN_AMPLITUDE = 2 ** 15  # 0 (min) to 32768 (max)
+SIN_OFFSET = 32767.5  # for 16bit range, (2**16 - 1) / 2
+DELTA_PI = 2 * math.pi / SIN_LENGTH  # happy little constant
+
+sine_wave = [
+    int(SIN_OFFSET + SIN_AMPLITUDE * math.sin(DELTA_PI * i)) for i in range(SIN_LENGTH)
+]
+tones = (
+    RawSample(array.array("H", sine_wave), sample_rate=1200 * SIN_LENGTH),
+    RawSample(array.array("H", sine_wave), sample_rate=1800 * SIN_LENGTH),
+)
+
+dac = audiopwmio.PWMAudioOut(board.SPEAKER)  # CLUE onboard speaker
+# dac = audiopwmio.PWMAudioOut(board.A2)  # external amp/speaker, but can't use #0 touch pad
+
+clue.display.brightness = 1.0
+clue.pixel.brightness = 0.2
+screen = displayio.Group(max_size=11)
+TEAL = 0x009E98
+LT_TEAL = 0x000F0F
+GRAY = 0x02403E
+BLACK = 0x000000
+WHITE = 0xFFFFFF
+YELLOW = 0xFFFF00
+
+clue.pixel.fill(0)  # Turn off the pixel
+
+# Setup screen
+# BG
+color_bitmap = displayio.Bitmap(240, 240, 1)
+color_palette = displayio.Palette(1)
+color_palette[0] = TEAL
+bg_sprite = displayio.TileGrid(color_bitmap, x=0, y=0, pixel_shader=color_palette)
+screen.append(bg_sprite)
+
+# Downbeat indicator graphic
+flash = Circle(184, 216, 16, fill=TEAL, outline=None)
+
+screen.append(flash)
+
+# title box
+title_box = Rect(0, 0, 240, 60, fill=GRAY, outline=None)
+screen.append(title_box)
+
+# title text
+title_label = label.Label(
+    terminalio.FONT, text="Metronome", scale=4, color=TEAL, max_glyphs=11
+)
+title_label.x = 14
+title_label.y = 26
+screen.append(title_label)
+
+# interval text
+interval_label = label.Label(
+    terminalio.FONT, text=("{} BPM".format(tempo)), scale=5, color=WHITE, max_glyphs=7
+)
+interval_label.x = 20
+interval_label.y = 95
+screen.append(interval_label)
+
+# mid line
+mid_line = Rect(0, 134, 240, 3, fill=GRAY, outline=None)
+screen.append(mid_line)
+
+# vert line
+vert_line = Rect(117, 134, 3, 56, fill=GRAY, outline=None)
+screen.append(vert_line)
+
+# Signature text
+sig_label = label.Label(
+    terminalio.FONT,
+    text=("{}/4".format(time_signature)),
+    scale=3,
+    color=BLACK,
+    max_glyphs=3,
+)
+sig_label.x = 30
+sig_label.y = 160
+screen.append(sig_label)
+
+# play text
+play_label = label.Label(
+    terminalio.FONT, text=(" play"), scale=3, color=BLACK, max_glyphs=5
+)
+play_label.x = 138
+play_label.y = 160
+screen.append(play_label)
+
+# footer line
+footer_line = Rect(0, 190, 240, 3, fill=GRAY, outline=None)
+screen.append(footer_line)
+
+# increment label
+increment_label = label.Label(
+    terminalio.FONT, text=("-1  +1"), scale=3, color=GRAY, max_glyphs=8
+)
+increment_label.x = 3
+increment_label.y = 220
+screen.append(increment_label)
+
+# show the screen
+clue.display.show(screen)
+
+
+def metronome(accent):  # Play metronome sound and flash display
+    clue.display.brightness = 0.5  # Dim the display slightly
+    if accent == 1:  # Put emphasis on downbeat
+        if blink_dot:
+            flash.fill = YELLOW  # Flash the indicator
+        if blink_light:
+            clue.pixel.fill(YELLOW)  # Flash the pixel
+        dac.play(tones[1], loop=True)
+    else:  # All the other beats in the measure
+        if blink_light:
+            clue.pixel.fill(LT_TEAL)  # Flash the pixel
+        dac.play(tones[0], loop=True)
+    time.sleep(BEEP_DURATION)  # Play the sound for a while
+    dac.stop()  # Then stop the sound
+    if blink_dot:
+        flash.fill = TEAL  # Turn off the downbeat indicator
+    if blink_light:
+        clue.pixel.fill(0)  # Turn off the pixel
+    clue.display.brightness = 1.0  # Restore display to normal brightness
+
+
+time.sleep(0.2)
+tempo_increment = 1  # increment for tempo value setting
+feedback_mode = 0  # 0 is sound and visual, 1 is sound only, 2 is visual only
+running = False
+
+t0 = time.monotonic()  # set start time
+
+
+while True:
+
+    # play/pause
+    if clue.button_b:
+        if play_label.text == " play":
+            play_label.text = "pause"
+        else:
+            play_label.text = " play"
+        running = not running
+        time.sleep(0.4)
+        beat = 1  # start with downbeat
+
+    # Time Signature change
+    if clue.button_a:
+        print("sig change")
+        if time_signature == 4:
+            time_signature = 3
+        else:
+            time_signature = 4
+        sig_label.text = "{}/4".format(time_signature)
+        time.sleep(0.4)
+        beat = 1  # start with downbeat
+
+    if running and (time.monotonic() - t0) >= delay:
+        t0 = time.monotonic()  # reset time before click to maintain accuracy
+        metronome(beat)
+        beat = beat - 1
+        if beat == 0:  # if the downbeat was just played, start at top of measure
+            beat = time_signature
+
+    # tempo changes
+    if clue.touch_0:
+        if tempo_increment is 1:
+            tempo_increment = 10
+            increment_label.text = "-10 +10"
+        else:
+            tempo_increment = 1
+            increment_label.text = "-1  +1"
+        time.sleep(0.2)  # debounce
+
+    if clue.touch_1:
+        if tempo > 40:
+            tempo = tempo - tempo_increment
+            delay = 60 / tempo
+            interval_label.text = "{} BPM".format(tempo)
+            time.sleep(0.2)  # debounce
+
+    if clue.touch_2:
+        if tempo < 330:
+            tempo = tempo + tempo_increment
+            delay = 60 / tempo
+            interval_label.text = "{} BPM".format(tempo)
+            time.sleep(0.2)  # debounce