This is just something to have disturbing fun with: the Agony Box.
I'm using an Adafruit's Circuit Playground Express with some CircuitPython code in it and some freely available WAV files. The WAV files had to be converted to PCM 16-bit Mono and I think I need to tune down their volume a bit. I used the open-source SoundConverter app in Ubuntu for the conversion:
the CircuitPython code is as follows:
import time import board import touchio import digitalio try: from audiocore import WaveFile except ImportError: from audioio import WaveFile try: from audioio import AudioOut except ImportError: try: from audiopwmio import PWMAudioOut as AudioOut except ImportError: pass # not always supported by every board! bpm = 120 # Beats per minute, change this to suit your tempo # Enable the speaker speaker_enable = digitalio.DigitalInOut(board.SPEAKER_ENABLE) speaker_enable.direction = digitalio.Direction.OUTPUT speaker_enable.value = True # Make the input capacitive touchpads capPins = (board.A1, board.A2, board.A3, board.A4, board.A5, board.A6, board.TX) touchPad =  for i in range(7): touchPad.append(touchio.TouchIn(capPins[i])) # The seven files assigned to the touchpads audiofiles = ["1aaa.wav", "1aarrgghh.wav", "1scream.wav", "1scream5.wav", "1scream7.wav", "1scream11.wav", "1ToddQuitit.wav"] audio = AudioOut(board.SPEAKER) def play_file(filename): print("playing file " + filename) file = open(filename, "rb") wave = WaveFile(file) audio.play(wave) time.sleep(bpm / 960) # Sixteenth note delay while True: for i in range(7): if touchPad[i].value: play_file(audiofiles[i])
I just modified the WAV files from this drum machine code that originally sounded like this:
Next I used some brass standoffs and standoff rounded metal caps to be able to better access the touch sensors. I soldered some Dupont wires to a 3.7V phone battery and filed down their ends a bit to fit the battery port of the Circuit Playground Express.
Now let's hear some screams:
Disturbing - I know.
I plan to use analog buttons and a cheaper CircuitPython-capable device to build a better Agony Box. This is just some quick hack I did.