First post, by James-F
- Rank
- Oldbie
If anyone care about sound here are some results after careful measurement and comparison with real SB cards and SC-55.
If you are interested in the procedure go to this thread: FM and PCM Volume Balance of SB Cards
To measure the dB balance between PCM and FM with a real SB card in DOS I had to run a sinewave test tones for the PCM and FM using various DOS programs and measure the difference between them in dB, I did the exact same procedure in DOSBox.
DOSBox FM was around 2-3dB louder than with a real SB cards (SBPro,SB16,SB2.0).
To calibrate volume balance between a hardware SC-55 and SC-VA I used a midi file (attached) I created to adjust the output between them.
Then after careful listening with various games I found an output value for dosbox to be in balance with SC-VA and a real SC-55.
For DOSBox to have the perfect mixer balance between SC-VA and its output, one has to set the Master in DOSBox to 50.
To have a realistic balance between FM and PCM one has to set FM in DOSBox mixer to 75, edit: fixed in SVN r4012, keep it at 100.
The PC Speaker emulation in ECE is way louder than the rest, so a good value after careful testing is 25.
For S-YXG50 to be in balance with SC-VA and DOSBox (at 50), S-YXG50 "Output Level" inside the plugin setup should be set to -10db.
MUNT has to be set to 70 in windows mixer because there is not internal master volume control.
EDIT: FM volume is fixed in SVN r4012, no need to change FM volume, keep it 100, and use the latest SVN.
The final command that once has to place in DOSBox autoexec.bat section:
mixer master 50 spkr 25