volume often full (2.0), but it really depends since some patches can be very quiet otherwise, i've spent a long time making every patch the same level.. if i turn down the internal volume its fine. but yeah it probably shouldn't change the patches in such a way that suddenly they distort.
Thanks again for the presets you sent me.
Full volume is 1.0 not 2.0.
The preenfm2 adjust the volume per voice depending on the number of instrument enable (voices > 0) and number of voices.
I tried your patches, the 3 of them have volume > 1.0.
I did not notice any difference between 2.20 and 2.20u (unison) firmwares. And I don't see in the code any reason for that.
When they distort in 2.20u they also distort in 2.20 with the tests i've done.
A possibility is that when you played them in 2.20 you had another instrument enabled (with voices > 0). So the volume was divded by 2.
And when trying them in 2.20u instrument you don't have other instrument enabled, so they use the full DAC resolution and because of volume > 1.0, the DAC buffer saturates.
Do you think that can be the reason ?
If not, please let me know how you tested.