Replay gain working with Volumio

[likescookies]

I wrestled with this a few years ago–I wrote up the instructions I followed here:

[SOLVED] ReplayGain help

Newbie here. I set up Volumio 2.201 on a new Raspberry Pi 3 a week or two ago with a Hifiberry DAC+. Working great; I use it as a DLNA renderer, streaming files from MinimServer on my NAS using Hi-Fi Cast on my Android phone as the control point. The only thing I can’t figure out is ReplayGain, which I don’t believe is working. In the Volumio playback volume options, I have Mixer Type set to Hardware. But I don’t see a UI for ReplayGain. I’d be grateful for any tips. I searched this board but …