Created
February 22, 2022 17:50
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Simple 1 octave piano in Python with live input
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| import numpy as np | |
| import simpleaudio as sa | |
| import os, sys, termios, time, tty | |
| # Key mapping: | |
| # W E T I U | |
| # A S D F G H J K | |
| # | |
| # Which translates to: | |
| # C#D# F#G#A# | |
| # C D E F G A B C | |
| # | |
| # Press = or + to increase tone duration, | |
| # - or _ to decrease, x or X to exit. | |
| seconds = .2 | |
| def _synth(f): | |
| frequency = int(f) | |
| t = np.linspace(0, seconds, seconds * 44100, False) | |
| note = np.sin(frequency * t * 2 * np.pi) | |
| audio = note * (2**15 - 1) / np.max(np.abs(note)) | |
| audio = audio.astype(np.int16) | |
| play_obj = sa.play_buffer(audio, 1, 2, 44100) | |
| play_obj.wait_done() | |
| def _getInput(): | |
| fd = sys.stdin.fileno() | |
| old_settings = termios.tcgetattr(fd) | |
| try: | |
| tty.setraw(fd) | |
| ch = sys.stdin.read(1) | |
| finally: | |
| termios.tcsetattr(fd, termios.TCSADRAIN, old_settings) | |
| print(ch) | |
| return ch | |
| while True: | |
| try: | |
| pressed = _getInput() | |
| if pressed in ("=" or "+"): # Increase tone duration | |
| seconds += .1 | |
| print(seconds) | |
| elif pressed in ("-" or "_"): # Decrease tone duration | |
| seconds -= .1 | |
| if seconds <= 0: # Don't allow the time to go to 0 | |
| seconds = .1 | |
| print(seconds) | |
| elif pressed in ("x" or "X"): # Press X to exit | |
| sys.exit() | |
| elif pressed == "a": _synth(261.63) # C | |
| elif pressed == "w": _synth(277.18) # C# | |
| elif pressed == "s": _synth(293.66) # D | |
| elif pressed == "e": _synth(311.13) # D# | |
| elif pressed == "d": _synth(329.63) # E | |
| elif pressed == "f": _synth(349.23) # F | |
| elif pressed == "t": _synth(369.99) # F# | |
| elif pressed == "g": _synth(392) # G | |
| elif pressed == "y": _synth(415.3) # G# | |
| elif pressed == "h": _synth(440) # A | |
| elif pressed == "u": _synth(466.16) # A# | |
| elif pressed == "j": _synth(493.88) # B | |
| elif pressed == "k": _synth(523.25) # C | |
| else: | |
| pass | |
| except: | |
| if pressed in ("x", "X"): print("Exiting..."); sys.exit() |
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