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ReViSiT Weird Audio in Live 8.1.5
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m00dawg
Posted 2010-08-27 3:26 AM (#15120)
Subject: ReViSiT Weird Audio in Live 8.1.5


New user

Posts: 1

I am getting really weird audio affects when trying to play an S3M file (attached). It includes 8-bit sounds emulating the NES sound chips. When I try to play it, the samples sound hipassed and really really rough. I recall having similar issues with certain samples in my library before but was never sure of the cause.

I am using this file to make a hybrid chiptune song and would prefer to use reViSiT for the chip part of it since trying to control chip sounds using a piano roll isn't so great.



Attachments
----------------
Attachments nespack_vrc6.s3m (45KB - 1 downloads)
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chrisnash
Posted 2010-09-04 1:26 AM (#15130 - in reply to #15120)
Subject: RE: ReViSiT Weird Audio in Live 8.1.5



Developer

Posts: 746
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Location: England

Hi m00dawg,

I took a look at your samples, and compared it with how they sound in MPT. MPT seems to do some extra funky stuff with chip tunes - but I thought the result actually didn't sound much like a square wave at all - it sounded like it had been heavily low-passed - and reViSiT thus seemed to be more faithful.

I did, however, note that reViSiT (like a lot of other software) doesn't interpolate when there is a big amplitude jump between the loop beginning and loop end - as with your square waves. You might have more luck doing it this way:

    ____
__|      |_

... instead of like this:

      ____
___|      

MPT actually seems to do something so that this happens automatically (it changes the samples itself, so the loop points always mesh). I'm going to look closer and see if this is worth addressing in reViSiT.

I did find a couple of bugs in the S3M loader (undocumented features of the S3M spec), and there might also be issues with having the loop end bang on the end of the sample, so stay tuned.

Hope this helps!

Chris

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