Differnt volume setting on different outputs?

[nyc_paramedic]

Is there anywhere to set mpd's outputs to different setting?

Example: mpd playing at %23 volume in one room via an amplifier and speakers while having volume for http streaming set at %100 for someone listening via headphones on iPhone/Androoid in another part of the house.

Currently, the volume is too low via http streaming to be useful for someone listening on a portable player.

I didn't see anything in man mpd.conf.