Name
Trim -- cuts portions out of the audio
Synopsis
trim {position(+)}
Function
Cuts portions out of the audio. Any number of positions may be given; audio is not sent to the output until the first position is reached. The effect then alternates between copying and discarding audio at each position. Using a value of 0 for the first position parameter allows copying from the beginning of the audio.

For example,

 
trim 0 10

will copy the first ten seconds, while

 
trim 12:34 =15:00 -2:00

and

 
trim 12:34 2:26 -2:00

will both play from 12 minutes 34 seconds into the audio up to 15 minutes into the audio (i.e. 2 minutes and 26 seconds long), then resume playing two minutes before the end of audio.

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