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Author Topic: Chopping up sound files.  (Read 14852 times)

Akima

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Chopping up sound files.
« on: 16 Dec 2015, 14:29 »
I wonder if I could consult the many musically capable people on the forum over a problem I am facing.

I have a need, from time to time, to "chop" sound files into fixed-length slices of n seconds, with as little loss as possible. I have used Time Splitter Audio to do this for years, but it has become orphan-ware and does not work on OS/X releases newer than Lion (10.7), which is no longer supported. It is possible to chop up sound files using Audacity, but it is a fiddly, error-prone and manual process. Can anyone point me towards a solution in an OS/X or possibly *nix environment?
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Pilchard123

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Re: Chopping up sound files.
« Reply #1 on: 16 Dec 2015, 14:43 »
I don't know for certain, but that sounds like something FFmpeg could help with.

E: Yup, if you have Ruby and FFmpeg. I imagine you could do something equivalent with your language of choice. I'll look around a bit more.
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Pilchard123

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Re: Chopping up sound files.
« Reply #2 on: 26 Dec 2015, 11:41 »
Did you manage to get this sorted out?
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Tova

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Re: Chopping up sound files.
« Reply #3 on: 26 Dec 2015, 13:34 »
Sorry I'm a bit late to this thread.

There is a command line utility called sox that you may want to investigate. I can't give details of the command line to use, but I know someone who uses it regularly, so if you want me to get some more info from her, let me know.
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Pilchard123

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Re: Chopping up sound files.
« Reply #4 on: 27 Dec 2015, 02:27 »
Plot twist: it's Akima.
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Akima

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Re: Chopping up sound files.
« Reply #5 on: 13 Jan 2016, 04:17 »
Thank you so much, Tova!

I'm sorry I was slow getting onto testing your suggestion, but SoX did the job nicely! The command line to do what I wanted was pretty easy (in this example chopping infile.wav into n sequentially-numbered output files of sixty seconds each):
Code: [Select]
sox infile.wav output.wav trim 0 60 : newfile : restart
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Tova

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Re: Chopping up sound files.
« Reply #6 on: 13 Jan 2016, 15:40 »
No worries, Akima! Happy to help out.
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Yet the lies of Melkor, the mighty and the accursed, Morgoth Bauglir, the Power of Terror and of Hate, sowed in the hearts of Elves and Men are a seed that does not die and cannot be destroyed; and ever and anon it sprouts anew, and will bear dark fruit even unto the latest days. (Silmarillion 255)
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