is possible to add this feature to the future release of fbn ?
by the time newer mame drivers lost the possibility to edit volume levels (for the sake of fidelity)
system16.c
UPD7759 (speech)
system18.c
RFC5684 (speech)
cps1.c
MSM6295 (4 channel for sound effect / voices)
qsound sfx / music on/off (this one avaible on kawaks)
midyunit.c
MSM6295 (4 channels, sound effect and voices levels editable)
DAC (music-drums)
YM2151 (music-melody)
but was very nice feature for the users, in the similar way the 'force 60hz' without stuttering sound (another thing lost in newer mame for the accurancy thing)