Patch is up: https://www.sendspace.com/file/ya2spw Sounds virtually indistinguishable from the hardware SBPro2 now that the filters match and volume balanced between FM/PCM. The SB16 is another story altogether because it has frequency dependent FIR Rectangle steep filter, a "Brick Wall" f...

Alright, I got the OPL filters fixed, and in balance to PCM. I will upload a DIFF file as soon as possible. OPL3 fixed.jpg I had to completely remove the filtering to match the SBPro OPL3 sound; I also lowered the division number from 4 to 2 to boost the volume after removing the filter, and tweaked...

Lo and behold, the SBPro2 is a simple 2nd order Butterworth at 3.2kHz which already lives in the code.
I only had to comment out the first order and change "NCoef 1" to "NCoef 2".
OPL next.

I'm really impressed, you actually got very close to the real SBPro2 filter! The SB hardware programming guide actually calls for 3.2kHz of the output filter. I think it is okay as it is because the SB2.0 is slightly less filtered, so it's a good balance. Lowpass.jpg Now, the OPL is definitely much ...

What do you have the SB16 tone controls set to? SBPro and SB16 show the same poor panning abilities in PCem or 6db. I didn't install the drives for SB16, but SBPro doesn't have bass/treble controls nor does it needs drivers. I do have sbp-set.exe which is the official mixer prog for the SBPro to te...

Hardware SBPro2 (hard panned RIGHT). Delta: 16.68db hardware SBPro pan.jpg Yes, the SBPro1 and SBPro2 (they behave the same) are actually reversed to the SB16, but DOSBox and PCem go it wrong, the channel emulation behaves like the SB16. That too we researched on Vogons: http://www.vogons.org/viewto...

Thank you very much! The fixed line has one too many parentheses in the beginning, so it didn't compile at first... I have measured many DOS ISA cards including the original SB1.5, SB2.0, SBPro2 and SB16 which I own. http://www.vogons.org/viewtopic.php?f=62&t=49683&start=40 After tens of com...

Unfortunately I have zero experience with programming, so I'll leave it at that.

Hi and thanks. I don't seem to find the right parameter to lower the OPL volume. Can you please be more specific which one? This volume adjustment should not be part of the mixer parameters that a game/windows can change. For example, with both Voice and FM mixer volume at max (16) the FM should be ...

EDIT: All posts about stereo separation problems should be ignored, I was using the wrong OpenAL32.dll I mainly will be running PCem with DOS configuration and SBPro or SB16 cards, so it is important that these cards emulation is accurate. I am a long time Vogons member and done a lot of research wi...