Re: [LAU] Wav loop points

Paul Davis:
>
> The most common formats for "loops defined inside an audio file" have
> historically been non-WAV (or extensions to wav), such as REX, and
> proprietary.
>
> The WAV spec does include the concept of a playlist, consisting of
> cue
> points and lengths. By themselves, these don't really define "loops"
> in a
> way that is generally going to be clear to the user.

I don't know of any official specifications of it, but it's common to
have
a cue called "Loop start", and a cue called "Loop End".

>
> libsndfile can definitely read these from the file, but i'm not sure
> what
> an app would do with them. providing a sample with a loop point(s)
> defined
> would be good.

Well, I didn't find any way to use libsndfile to get the cue points.
They are displayed using sndfile-info, but I don't think you can get
the numbers
via the libsndfile api without parsing the text output of the functions
libsndfile-info calls.

It's simple to implement without libsndfile though. Just steal the code
from radium. :-)

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Received on Tue Dec 11 16:15:03 2012