Iridium Volume Vs. Level

Hi there - joining the thread because I’m also interested in using the waveform generator to act like a tremolo (preferably stereo/panning/harmonic) by controlling the Iridum volume.

I saw this thread where the poster managed to do this with their Walrus ACS1:

Sorry I don’t know the difference between the CC#12 ‘Level’ and CC#7 ‘Volume Pedal’.

Cheers!