AY8930 PWM issue in audio export.

[FloResGaming]

So I made a track that uses the AY8930. Sound great due in part to the PWM. Now I don't know everything about the AY8930, but I did attempt to make a smooth PWM with the Tone (Square waveform) + Noise (using the AND/OR mask stuff). I meticulously set different noise frequencies and pitches (for the Tone), and even initiated the track with a specific pitch.

It's only 1 pattern that loops, but each it plays it should start with thin pulse (approx. 0% duty), that goes from that to square (approx. 50% duty), and then rebounds back to that initial thin pulse by the end of the pattern. And I made sure that it was like that when I played the track in the beginning til the end, as the track doesn't start with the PWM I described, it comes in later in the track. So I wanted to make sure that part came in with the right pulse.

After it sounded good enough for me I exported the audio, reluctantly. I say reluctantly, since I expected something to be off, knowing how finnicky the AY8930 is with that feature. Lo and behold, it sounds like the PWM starts and ends with a different pulse (approx. 37.5%), and I didn't need an oscilloscope to find that out. It still sounds smooth but the pulse still throws me off. I just wonder the output sounds different from the tracker's playback.

My file: https://drive.google.com/file/d/15VUb_Vo_kYsBGEUOSN7PMk_ktcQRqMxy/view?usp=drive_link
It's the 2nd channel first chip (the AY chip)