I'll send you a couple of files with this behavior, if I still have them. I kept some glitches, while I removed some others. I used your last converter from 2015-01-14 I think, I re-downloaded yesterday this one and compared with the cpp code and it was the same https://github.com/utz82/ZX-Spectrum-1- … p?raw=true
for the slides, they sound more like bass drums