A python script which allows you to repeat the last sample of audio repeatedly while holding down the button

audioglitch.py

#                             Audio Glitch 
#     Michael "headline" Flaherty - michaelwflaherty@me.com - 12/14/2019
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <https://www.gnu.org/licenses/>.

# Installation
# 1) Install python 3
# 2) run "pip install pyaudio"
# 3) Once pyaudio is installed run the script
# 4) rejoice
#
# If ya'll struggle too much email me and ask for an *.exe installation

import pyaudio
import _thread

from tkinter import *
from tkinter.ttk import *
from tkinter import messagebox

class AudioHandler:
	def __init__(self, CHUNK):
		self.CHUNK = CHUNK
		self.p = pyaudio.PyAudio()
		self.inputdevice = -1
		self.outputdevice = -1
		self.monitordevice = -1
		self.instream = None
		self.outstream = None
		self.monstream = None
		
	def lockDevices(self):
		if self.inputdevice == -1 or self.outputdevice == -1:
			raise Exception('Input or Output device has not been set.')
		if self.instream != None or self.outstream != None:
			raise Exception('Input or Output stream already exists.')
			
		self.instream = self.p.open(format=self.p.get_format_from_width(4), channels=1, rate=44100, input=True, input_device_index=self.inputdevice)
		self.outstream = self.p.open(format=self.p.get_format_from_width(4), channels=1, rate=44100, output=True, output_device_index=self.outputdevice)
		
		if self.monitordevice != -1:
			self.monstream = self.p.open(format=self.p.get_format_from_width(4), channels=1, rate=44100, output=True, output_device_index=self.monitordevice)

	def getInputDevices(self):
		indexes = []
		devicenames = []
		info = self.p.get_host_api_info_by_index(0)
		numdevices = info.get('deviceCount')
		for i in range(0, numdevices):
				if (self.p.get_device_info_by_host_api_device_index(0, i).get('maxInputChannels')) > 0:
					indexes.append(i)
					devicenames.append(self.p.get_device_info_by_host_api_device_index(0, i).get('name'))
		return [indexes, devicenames]
	def getOutputDevices(self):
		indexes = []
		devicenames = []
		info = self.p.get_host_api_info_by_index(0)
		numdevices = info.get('deviceCount')
		for i in range(0, numdevices):
				if (self.p.get_device_info_by_host_api_device_index(0, i).get('maxOutputChannels')) > 0:
					indexes.append(i)
					devicenames.append(self.p.get_device_info_by_host_api_device_index(0, i).get('name'))
		return [indexes, devicenames]

	def doOverwrite(self, run, data):
		while data != '' and len(run) > 0:
			self.outstream.write(data)
			if self.monitordevice != -1:
				self.monstream.write(data)

ah = AudioHandler(2048)

window = Tk()
window.pack_propagate(0)
window.resizable(0, 0)
window.geometry("450x175")
window.title("Audio Glitch v1.1")

label = Label(window, text = "Select microphone input", font=("Consolas", 12))
label.grid(column=0, row=0)

ideviceinfo = ah.getInputDevices()
input = Combobox(window, width=35, state='readonly')
input['values'] = ideviceinfo[1]
input.current(0)
input.grid(column=0, row=2)

label = Label(window, text = "Select virtual audio cable", font=("Consolas", 12))
label.grid(column=0, row=4)

odeviceinfo = ah.getOutputDevices()
output = Combobox(window, width=35, state='readonly')
output['values'] = odeviceinfo[1]
output.current(0)
output.grid(column=0, row=6)

label = Label(window, text = "Select monitoring output", font=("Consolas", 12))
label.grid(column=0, row=7)

mondeviceinfo = ah.getOutputDevices()
mondeviceinfo[1].insert(0, 'None')
mondeviceinfo[0].insert(0, -1)

monitor = Combobox(window, width=35, state='readonly')
monitor['values'] = mondeviceinfo[1]
monitor.current(0)
monitor.grid(column=0, row=8)

Label(window, text='Buffer size: ').grid(column=1, row=0)
buffersize = Entry(window)
buffersize.grid(column=2, row=0)
buffersize.insert(0, '2048')

run = []
def audioloop(run):
	data = ah.instream.read(ah.CHUNK)
	while data != '':
		if len(run) > 0:
			ah.doOverwrite(run, data)
		else:
			ah.outstream.write(data)
			data = ah.instream.read(ah.CHUNK)

def lock():
	try:
		ah.CHUNK = int(buffersize.get())
		if ah.CHUNK < 1024:
			raise BufferError();
		if output.get() == monitor.get():
			raise NameError();
	except ValueError:
		messagebox.showerror("Parsing Error", "Buffer size must be integer value!")
		return;
	except BufferError:
		messagebox.showerror("Buffer Error", "Buffer size must be at least 1024!")
		return;
	except NameError:
		messagebox.showerror("Name Error", "Monitoring output must not be the same as audio cable output!")
		return;

	ah.inputdevice = ideviceinfo[0][ideviceinfo[1].index(input.get())]
	ah.outputdevice = odeviceinfo[0][odeviceinfo[1].index(output.get())]
	if monitor.get() != 'None':
		ah.monitordevice = mondeviceinfo[0][mondeviceinfo[1].index(monitor.get())]

	ah.lockDevices()

	#disable UI elements
	input.config(state='disabled')
	output.config(state='disabled')
	monitor.config(state='disabled')
	button.config(state='disabled')
	buffersize.config(state='disabled')
	glitch.config(state='normal')

	try:
		_thread.start_new_thread(audioloop, (run, ))
	except:
		print("Unable to start audio thread")

button = Button(window, text='Lock audio devices', command=lock)
button.grid(column=2, row = 4, ipady=3, ipadx=3)

def glitch_on(event):
	global run
	run.append(1)
	
def glitch_off(event):
	global run
	run.remove(1)

glitch = Button(window, text="Hold to glitch")
glitch.bind('<ButtonPress-1>', glitch_on)
glitch.bind('<ButtonRelease-1>', glitch_off)
glitch.grid(column=2, row = 8, ipady=10, ipadx=10)
glitch.config(state='disabled')
		
window.mainloop()