How can I analyze a segment of an audio file with sox?

Question

I wanted to analyze 5 seconds of an audio file beginning from 50 seconds.

So I ran the following command:

sox audio.wav -n stat trim 50 5

But the output contained:

... Length (seconds): 55.296000 ...

But I expected only 5 seconds, not 55.

What did I do wrong? I thought that 50 was the start and 5 - the duration.

@dirkt: No, the second argument is a relative position unless it is prefixed by = — Thor
– Thor, Commented Jun 30, 2017 at 10:09

Thor · Accepted Answer · 2017-06-30 10:07:36Z

The effects function as a chain, so the stat effect feeds into trim, swap them around and it will work, e.g.:

sox audio.wav -n trim 50 5 stat

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