mid2vgm volume is too low

[denjhang]

Is it possible to provide an option to increase the VGM volume.

[Wohlstand]

Theoretically, it's possible to scale all note volumes up to maximum, that should be a sort of post-processing. Right now, the output is the same as libOPNMIDI plays itself. Right now, you can increase volume if you will edit your MIDI file by maximizing all note and controllers volumes (suggested to do with Sekaiju, there is a very convenient way for mass changes), and the result will be louder. The maximum possible volume is volume, 127, the velocity of note 127, and expression 127. The final note volume at the chip (and at VGM) is computed from this. (The OPN2 chip receives the single value for the note volume, that appears at EVERY note at resulted VGM file)