SpritesMind.Net

You got a different clock on 2612 which is why the envelopes are faster. If you use same clock for both you will got same results.

Good point, I hadn't considered that. Hunting around I think the standard clock rate for DX series is 7.14 vs 7.67 so ~7% faster for the genesis.

After some deep googling I found a couple of references to converting patches from a DX series to the YM2612. One said map 0-99 to 127-0 linearly (I'm pretty sure this is wrong), another said they are the same scale and the lowest levels aren't used by the DX's and so zero for a DX is the same as 99 ...

Do you know any decibel relation of the 0 ti 99 mapping ?

1 step in 0.75db on all 0...127 scale, 8 steps is 6db and so on.

I don't know the dB value and none of the manuals for the DX series give any indication. I think it's because it's combined with input key velocity (I send 100) and ...

I've been writing a program to play YM2612 VGM files on my Yamaha TX81Z (based on the YM2414) . I've gotten far enough that I can get songs playing fine and some of them sound quite good but the instruments don't sound quite right.
The register set for the YM2612 seems almost identical to the TX81Z ...