Volume

Number: 7 (coarse) 39 (fine)

Affects:

The volume level for one MIDI channel. If a MultiTimbral device, then each Part has its own volume.

Note: A device's master volume may be controlled by another method such as the Univeral SysEx Master Volume message, or take its volume from one of the Parts, or be controlled by a General Purpose Slider controller.

Expression Controller also may affect the volume.

Value Range:

14-bit coarse/fine resolution. 0x0000 to 0x3FFF where 0 is no volume at all.

Note: Most all devices ignore the Fine adjust (#39) for Volume, and just implement Coarse adjust (#7) because 14-bit resolution isn't needed for this. In this case, maximum is 127 and off is 0.

It is recommended that a device use the volume value in a logarithmic manner, as specified by the following formula if only the coarse value is used:

40 log (Volume/127)

If both the coarse and fine values are used (and combined into a 14-bit volume), then use the following formula:

40 log (Volume/127²)