The output volume level is very weak when I play Roon through DietPi/Shairplay. Is there some sort of pre-amp level setting I’m missing?
I have RoonBridge installed on the same DietPi image, and when I play the same song through RoonBridge (at the same volume setting), it is much louder. (I’d rather just use RoonBridge, but I need Shairplay for grouped playback with other endpoints around the house.)
Hardware is a Raspberry Pi 3, wifi in, onboard 3.5mm audio out. DietPi soundcard setting: rpi-bcm2835 (tried both standard and forced 3.5mm). PSU noise reduction enabled in DietPi.
Is there any way to get a stronger output signal without purchasing an external sound card?