Does anyone know anything about the N163 clicking noise bug?

[w7n]

It's like this: Earlier, I attempted to implement instrument bankswitching in the FT NSF engine so that it's able to output NSF with more instruments. The modded FT (based on 0CC-FT 0.3.9) now generates such an NSF file (the N163 pitch table is not yet fixed but ignore this for now) with 177 FDS instruments and a bunch other instruments. All other things work fine, except that there's some clicking noise bug in the N163:

When the clicking noise bug happens, the N163 waveforms show properly in the NSFPlay visualizer, but the sounds are just clicking noise. This doesn't happen on VNSF, but it's quite likely that it will also occur on hardware. So what's the cause of it? (Hardware specs, not about the FT program itself.)

The bug occurs with N163 instruments 28,29,2A.

[Xyz]

uh, with this nsf you've provided, we can't tell what instruments 28,29 and 2A actually are...we kinda need the ftm

[Sky Yoshi]

Funny thing is that if I played the NSF on Vurtual NES, It crashes.