Simultaneous record audio from mic and play it back with effect in python

Question

My goal is to record my voice through the laptop mic and simultaneously adding an effect to it, in python. What I need is similar to a music effects pedal where you connect

Answer 1

To expand on Luke's answer:

for i in range(0, int(RATE / CHUNK * RECORD_SECONDS)):
    data = stream.read(CHUNK)
    frames.append(data)

In your code is where you commit to a certain time of recording. If you wrote a function "isSilent" that can determine if a chunk is silent, your code might change to:

while len(frames) <= 0 or not isSilent(frames[-1]):
    data = stream.read(CHUNK)
    frames.append(data)

If "isSilent" is to hard to write or if it is to computationally slow you can wait for user input. KeyboardInterrupt is a first hack to play with this method:

try:
    while true:
        data = stream.read(CHUNK)
        frames.append(data)
except KeyboardInterrupt:
    pass

This is a hack, and not the right way to look for user input in production, but it will let you start experimenting with this. you will want to find or make a stopButtonHasBeenPressed function.

while not stopButtonHasBeenPressed():
    data = stream.read(CHUNK)
    frames.append(data)