tweak clipping of .XM so that it matches ft2(-clone)/milkytracker

[coderofsalvation]

I've noticed that milkytracker & ft2-clone clip in exactly the same way, but bassoontracker not (it has much more headroom, perhaps because of the higher float-resolution?).

I was talking to 8bitbubsy (ft2-clone) about the fact whether there's even something about it in the spec. He said:

"At full amp in the FT2 config screen (32x), one voice equals full volume (0dB, peak). And about clipping, FT2 clamps the final 16-bit value after mixing of all voices is done, right before it sends the mixed stereo stream to the sound card So it has a 32-bit integer mix buffer"

Maybe we can clamp the mix to 16 bit values (and adjust 0db to the maximum value of 16bit?) so that it clips everything beyond that?

kind regards,

Leon

background: some of my modules (and other producers who use daws) use clipping in a musical way (boost transients of a mix to pierce through other sounds, which are shaven off when clipped, to increase perceived loudness).