Airplay disconnecting and disappearing?

[Tim Curtis]

In moOde the Airplay receiver automatically picks up the Volume config from MPD unless you force Airplay to use "Software" volume in Airplay config screen. If your DAC works with MPD set to Hardware but Airplay does not, which is what the error "failed to attach to mixer" suggests, then you can try setting Airplay to "Software" volume in Airplay config screen.