SoX How to add noise to a file?

Question

I would like to ADD noise to audio files. Is there a way to accomplish this in SoX (or other tool)?

I am performing machine learning research, and need to test my algorithms in the presence of noise. Ideally, I would like to specify a signal to noise ratio and have noise added to reach that target SNR.

I know that I could generate a noise file and subsequently mix it with each of my source files. As I need to do this in a batch mode over thousands of files, I seek simpler more elegant method.

Any ideas or suggestions most welcome. Thank you.

There is no single SoX command, but some scripting could do it. Are you on Linux, OS X, Windows, …? — chirlu, Jul 19 '13 at 00:50

score 3 · Answer 1 · answered Jul 30 '14 at 21:52

3

I came across the same problem and found this website particularly useful:

http://linguistics.berkeley.edu/plab/guestwiki/index.php?title=Sox_in_phonetic_research#Add_noise_to_an_audio_file

answered Jul 30 '14 at 21:52

Cassandra

31
4

score 2 · Answer 2 · answered Jun 13 '18 at 09:08

2

Piping outputs gave me error. Instead, just write the noise on a file and then do the mixing:

sox input.wav noise.wav synth whitenoise vol 0.02 && sox -m input.wav noise.wav noisyinput.wav

answered Jun 13 '18 at 09:08

Yusuf Tarık Günaydın

3,016
2
27
41

SoX How to add noise to a file?

2 Answers2

Linked