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