[PD] Sample loop - start and end point (WAV files)

Ingo ingo at miamiwave.com
Wed Feb 12 09:29:52 CET 2020

I have been working with hardware samplers since the 80ies and used (mainly) 
softwares like SoundForge or Wavelab for looping.
There was no extra file. All hardware samplers could read the loops. Once a 
file was looped with one sampler it would be looped with the next one. Same 
thing with modern software Samplers like Kontakt.
I can use a sample that I looped in Wavelab and load it into SoundForge and it 
recognizes the loops.
(There are options for multiple loops, though that might not work with some 

It can't be such a secret since over 30 years that all manufacturers (software 
or hardware) know about it but noone else.
I have been looking around but couldn't find any information where the loops 
are stored in the file but they definitely are.


> -----Original Message-----
> From: Pd-list [mailto:pd-list-bounces at lists.iem.at] On Behalf Of Roman
> Haefeli
> Sent: Wednesday, February 12, 2020 8:48 AM
> To: pd-list at lists.iem.at
> Subject: Re: [PD] Sample loop - start and end point (WAV files)
> On Tue, 2020-02-11 at 21:22 -0800, Alexandre Torres Porres wrote:
> > Well, I was really really hoping to see information here on how to get
> > loop points from these files ;)
> I looked around for specifications of the .wav-format and I wasn't able to 
> find
> one that looks canonical. The ones I found didn't mention any loop start- 
> and
> endpoints. I wonder whether there is a convention about how to encode this
> into some sort of metadata stored with file. Some description of the format
> describe the ability to store anything as metdata. Personally, I never dealt
> with such files (at least not knowingly). Maybe a good start would be to
> provide such a file, so that people can a have a look at it. It might be not 
> that
> difficult to retrieve such data with something like mrpeach's [binfile], 
> once
> you know how it is stored.
> Roman

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