Direct output audio to input mic using on linux with python

Question

Hi I have a piece of code for recording audio using python and alsa audio module based on the example described here to test out some pitch detection algorithms. I was hoping if there's a way I could somehow record the audio from browser or media player into my program.

Here's my code :-

import alsaaudio
import struct
from aubio.task import *

# Constants 
CHANNELS = 1
INFORMAT = alsaaudio.PCM_FORMAT_FLOAT_LE
RATE = 44100
FRAMESIZE = 1024
PITCHALG = aubio_pitch_yin
PITCHOUT = aubio_pitchm_freq


# set up the audio input
recorder = alsaaudio.PCM(type = alsaaudio.PCM_CAPTURE)
recorder.setchannels(CHANNELS)
recorder.setrate(RATE)
recorder.setformat(INFORMAT) 
recorder.setperiodsize(FRAMESIZE)

# set up pitch detect
detect = new_aubio_pitchdetection(FRAMESIZE, FRAMESIZE / 2, CHANNELS,
                              RATE, PITCHALG, PITCHOUT)
buf = new_fvec(FRAMESIZE, CHANNELS)

def pitches():
    runflag = 1
    while runflag :

        # read data from audio input
        [length, data] = recorder.read()

        # convert to an array of floats
        floats = struct.unpack('f' * FRAMESIZE,data)

        # copy floats into structure
        for i in range(len(floats)):
            fvec_write_sample(buf, floats[i], 0, i)

        # find pitch of audio frame
        freq = aubio_pitchdetection(detect, buf)

Right now I am using a cable to direct audio out to input but the quality as expected is not very good.

For future reference, you should still paste code examples in, rather than linking to them. — joedborg, Apr 16 '15 at 12:33
The answers here _may_ be helpful: [Capture audio out Python](http://stackoverflow.com/questions/10888058/capture-audio-out-python) — PM 2Ring, Apr 16 '15 at 12:42
@PadraicCunningham Yes I want to read the data into an array — anath2, Apr 17 '15 at 08:08

Direct output audio to input mic using on linux with python

0 Answers0