How to write speaker output to a file sounddevice

Question

Is there a way that I can use the python library sounddevice to write the output through my speakers to a file?
For example if I were to play any sounds through my computer they would be written to a mp4/wav file.

Asked By: TheFluffDragon9

||

Source

Answer 1

This is a solution: (See comments)

import sounddevice as sd
from scipy.io.wavfile import write

fs = 44100  # Sample rate
seconds = 3  # Duration of recording
sd.default.device = 'digital output'  # Speakers full name here

myrecording = sd.rec(int(seconds * fs), samplerate=fs, channels=2)
sd.wait()  # Wait until recording is finished
write('output.wav', fs, myrecording)  # Save as WAV file

The above code was from: https://realpython.com/playing-and-recording-sound-python/#python-sounddevice_1 which is a full tutorial in sound in python and how to record and play sound.

Answered By: Eno Gerguri

Answer 2

You can just specify the output device – for example:

import sounddevice as REC
REC.default.device = 'Speakers (Realtek High Definition Audio), Windows DirectSound'

To get all the sound devices that sounddevice recognizes you can use this command in ur command line:

this:    py -m sounddevice
or this: python -m sounddevice
or this: python3 -m sounddevice

working code for me:

from scipy.io.wavfile import wavWrite
import sounddevice as REC

# Recording properties
SAMPLE_RATE = 44100
SECONDS = 10

# Channels
MONO    = 1
STEREO  = 2

# Command to get all devices listed: py -m sounddevice 
# Device you want to record
REC.default.device = 'VoiceMeeter VAIO3 Output (VB-Audio VoiceMeeter VAIO3), Windows DirectSound'

print(f'Recording for {SECONDS} seconds')

# Starts recording
recording = REC.rec( int(SECONDS * SAMPLE_RATE), samplerate = SAMPLE_RATE, channels = MONO)
REC.wait()  # Waits for recording to finish

# Writes recorded data in to the wave file
wavWrite('recording.wav', SAMPLE_RATE, recording)

Answered By: GTDT

Answer 3

I got this solution working, using device nr (6):

from scipy.io import wavfile
import sounddevice as REC

# to list devices:
    # python -m sounddevice

# Recording properties
SAMPLE_RATE = 44100
SECONDS = 10

# Channels
MONO    = 1
STEREO  = 2

# Command to get all devices listed: py -m sounddevice 
# Device you want to record
# REC.default.device = 'VoiceMeeter VAIO3 Output (VB-Audio VoiceMeeter VAIO3), Windows DirectSound'
# REC.default.device = 'Speakers (Realtek High Definition Audio), Windows DirectSound'
REC.default.device = 6
REC.default.channels = 2,0

"""
   0 Microsoft Sound Mapper - Input, MME (2 in, 0 out)
>  1 Desktop Microphone (Trust Webca, MME (2 in, 0 out)
   2 Microphone (Realtek(R) Audio), MME (2 in, 0 out)
   3 Microsoft Sound Mapper - Output, MME (0 in, 2 out)
<  4 Headphones (Realtek(R) Audio), MME (0 in, 2 out)
   5 2 - C27F390 (AMD High Definitio, MME (0 in, 2 out)
   6 Primary Sound Capture Driver, Windows DirectSound (2 in, 0 out)
   7 Desktop Microphone (Trust Webcam), Windows DirectSound (2 in, 0 out)
   8 Microphone (Realtek(R) Audio), Windows DirectSound (2 in, 0 out)
   9 Primary Sound Driver, Windows DirectSound (0 in, 2 out)
  10 Headphones (Realtek(R) Audio), Windows DirectSound (0 in, 2 out)
  11 2 - C27F390 (AMD High Definition Audio Device), Windows DirectSound (0 in, 2 out)  
  12 Headphones (Realtek(R) Audio), Windows WASAPI (0 in, 2 out)
  13 2 - C27F390 (AMD High Definition Audio Device), Windows WASAPI (0 in, 2 out)       
  14 Desktop Microphone (Trust Webcam), Windows WASAPI (1 in, 0 out)
  15 Microphone (Realtek(R) Audio), Windows WASAPI (2 in, 0 out)
  16 Headphones (Realtek HD Audio output), Windows WDM-KS (0 in, 2 out)
  17 Microphone (Realtek HD Audio Mic input), Windows WDM-KS (2 in, 0 out)
  18 Microphone (Realtek HD Audio Front Mic input), Windows WDM-KS (2 in, 0 out)        
  19 Stereo Mix (Realtek HD Audio Stereo input), Windows WDM-KS (2 in, 0 out)
  20 Desktop Microphone (Trust Webcam), Windows WDM-KS (1 in, 0 out)
  21 Output (AMD HD Audio HDMI out #1), Windows WDM-KS (0 in, 2 out)
"""

print(f'Recording for {SECONDS} seconds')

# Starts recording
recording = REC.rec( int(SECONDS * SAMPLE_RATE), samplerate = SAMPLE_RATE, channels = 2)
REC.wait()  # Waits for recording to finish

# Writes recorded data in to the wave file
# wavWrite('recording.wav', SAMPLE_RATE, recording)
wavfile.write('recording.wav', 44100, recording)

Answered By: starter kit

How to write speaker output to a file sounddevice

Question:

Answers: