keyboard script using Python sounddevice

1 files changed, 51 insertions, 0 deletions

diff --git a/keyboard.py b/keyboard.py
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index 0000000..301c950
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+++ b/keyboard.py
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+import math
+import sounddevice as sd
+import os
+import sys
+
+# Number of times to sample each second
+bitrate = 44100
+
+
+def freq(octave, step):
+    """
+    Returns the frequency of a note
+    """
+    return 55 * 2 ** (octave + step / 12 - 1)
+
+
+def tone(f, t):
+    """
+    Returns the intensity of a tone of frequency f sampled at time t
+    """
+    # https://dsp.stackexchange.com/questions/46598/mathematical-equation-for-the-sound-wave-that-a-piano-makes
+    # https://youtu.be/ogFAHvYatWs?t=254
+    # return int(2**13*(1+square(t, 440*2**(math.floor(5*t)/12))))
+    # Y = sum([math.sin(2 * i * math.pi * t * f) * math.exp(-0.0004 * 2 * math.pi * t * f) / 2**i for i in range(1, 4)])
+    # Y += Y * Y * Y
+    # Y *= 1 + 16 * t * math.exp(-6 * t)
+    w = 2 * math.pi * f
+    Y = 0.6 * math.sin(w * t) * math.exp(-0.001 * w * t)
+    Y += 0.2 * math.sin(2 * w * t) * math.exp(-0.001 * w * t)
+    Y += 0.05 * math.sin(3 * w * t) * math.exp(-0.001 * w * t)
+    Y += Y * Y * Y
+    Y *= 1 + 16 * t * math.exp(-6 * t)
+    return Y
+
+
+note = []
+for i in range(0, 24):
+    note.append([tone(freq(3, i), j / bitrate) / 4 for j in range(0, 3 * bitrate)])
+
+sd.default.samplerate = bitrate
+print('READY')
+
+while True:
+    os.system('stty raw -echo')
+    c = sys.stdin.read(1)
+    os.system('stty -raw echo')
+
+    x = '`1234567890-~!@#$%^&*()_'.index(c)
+    print(x)
+
+    sd.play(note[x])