Hi Avkooi, glad you like it 
. To emulate of OKI and SegaPCM chips on OPL4 is on my wishlist.
The SFG and Music Module should not conflict, and they work fine together on my turboR. However I can indeed reproduce the problem you experience on my Zemmix Neo.
After looking into it a bit further, it appears to be an OCM bug; the MSX-AUDIO detection is very simple, it simply reads I/O port C0H and expects the value 6. However, when the SFG is inserted, the value 0 is returned and thus the MSX-AUDIO is not detected, and VGMPlay does not try to play on it.
More strangely though, when I check the value from Basic with ?INP(&HC0) it does return 6. Turns out that in assembly code, when I use in a,(0C0H) it returns 0, but when I use ld c,0C0H ; in a,(c) it does return 6, while that should make no difference whatsoever. So there seems to be a bus timing problem with this combination of modules in the OCM, that I can’t do much about.
I’ll paste this convo in the OCM firmware thread, maybe KdL can investigate further.
Still trying to find a reason to order one when it's released. But I'll buy it without a reason as well 
I do like those hardware effects. Dunno any fact of the Darky, but I'd like it to have some tweakable firmware in which the user can do some settings so they'll apply in the game you're about to play.
Panning, delay, volume, the mentioned reverb and echo. Would be nice to assign those effects to any of the channels and since Darky has twice as many channels it would be great to be able to clone original channels with a different volume, panning and effect for maximum stereo effect...
If any of those wishes is granted I found a reason to have one
There’s no firmware in the current prototype, I changed the DSP effect settings from Basic before running VGMPlay.
Agree with you though .
