15kHz PWM atari 800 pokey 

Unstable timing is a real mess when editing it in RMT. In Altirra itself , it plays fine. One note is still messy . You might recognize it.
To get that solved, it is a trial and error in RMT... doing changes... export.... test in Altirra .... till the note is correct.
On the other hand, it is shown on the diplay why it sounds as it sounds.
So it isn't really boring :)

Кино