First post, by James-F
News Flash about a bug in the Yamaha YMF71x Mixer
FM = OPL/Wavetable.
WAVE = PCM/Voice.
CD = CD
Line = Line-In
SB = A VERY BUGGY SBPro master volume slider.
Master VOL = Master volume of the card itself (keep at 15).
In the process of digging deeper I discovered that the YMF71x mixer has a bug where if SB setting is other than 1 (out of 7) the mixer is non responsive to games and volume changes.
Setting SB to 1 doesn't actually lower any volume of the emulated SBPro but gives the other sliders more range, if it is set to 7 the other sliders do NOTHING and so are games that use the mixer.
Now that the SB volume is set to 1 the YMF717x works just like a normal SBPro and games like Wolfenstein3D and Duke Nukem 3D can control the volume of the mixer like they should.
Well then, another mystery solved. 😎
Now go set your Yamaha YMF71x mixer setting SB to 1 and keep it that way.