Change audio format without changing audio from the command line

Question

I have some audio recorded form an i2s mic at 16000hz with arecord. It sounds like it is down an octave so I want to change the file format to 32000hz. When I try to do this with sox it edits the audio, not just the format so it still sounds wrong.

This is the sox command I am using: sox in.wav -r 32000 out.wav What command should I use instead?

score 1 · Accepted Answer · answered Aug 12 '22 at 16:01

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Looks like order matters in the command. The correct command is: sox -r 32000 in.wav out.wav

answered Aug 12 '22 at 16:01

bob mcgrath

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ya, it said I had to wait 48 hours before accepting my own answer. – bob mcgrath Aug 14 '22 at 21:00
My apologies. I should have looked at your posting date/time. – Phil Freihofner Aug 14 '22 at 21:43

score 0 · Answer 2 · answered Aug 12 '22 at 15:11

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If you want to change the audio rate, you can do it this way with ffmpeg:

ffmpeg -i input.wav -ar 32000 output.wav

answered Aug 12 '22 at 15:11

szpal

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This has the same problem. It changes the audio along with the format. I only want to change the format. – bob mcgrath Aug 12 '22 at 15:16
What does the word 'format' mean to you? – szpal Aug 12 '22 at 15:19
I have the right 1s and 0s, but the wav header specifies a 16khz sample rate, and it should say that the file has a 32khz sample rate so that it plays correctly. – bob mcgrath Aug 12 '22 at 15:22
I got it. The order matters in the command. – bob mcgrath Aug 12 '22 at 16:00

Change audio format without changing audio from the command line

2 Answers2