MIDI CC# 7 is standard for volume control in most anything.
And swell pedals that output midi cc information are made. However, I don't find them laying around at guitar center the way I find the usual 1/4" jack 100Kohm pedals.
One thing I don't know: Since CC only has 128 values (0-127) is there a noticeable step effect when it comes to volume changes? Never tried. I've always played and recorded in audio not midi maps.
And swell pedals that output midi cc information are made. However, I don't find them laying around at guitar center the way I find the usual 1/4" jack 100Kohm pedals.
One thing I don't know: Since CC only has 128 values (0-127) is there a noticeable step effect when it comes to volume changes? Never tried. I've always played and recorded in audio not midi maps.