Hi, I’m a miniDSP SHD user, but I think this applies to all versions.
The volume adjustment in Volumio is between 0 and 100 with minimum increment of 1. My miniDSP SHD has volume adjustment between -127.5 and 0 dB with increments of 0.5, total of 255 steps, which is typical for a DAC. So when adjusting volume by Volumio, 0 is -127.5 dB and 100 is 0 dB, and it usually jumps more than intended. Each half of dB is meaningful and this kind of precision is pretty standard for audio amplifiers.
I have read the API docs at WebSocket APIs | Volumio Developers Documentation for a remote control app I made to complement the default miniDSP infrared remote, but the volume control is not useful with such a large steps.
So, it would be good to have fine-grained volume control in the decibel scale with increments of 0.5 dB. Or if that’s impossible, please give us more steps and maybe a configurable option for it. If at all possible, put it to SHD too 