04-06-2023, 02:37 PM
Actually Airplay and Spotify Connect receivers both provide their own software volume control routines. Their clients just send volume level requests.
The Multiroom receiver moOde uses does not have a volume control routine, it just receives audio packets and forwards them them on to the ALSA output thus volume control has to be via something external like ALSA Hardware volume or a physical volume control on the audio device.
IME most audio devices that have XMOS USB chipsets support ALSA hardware volume. It's odd that the Sabaj device apparently does not. You might want to ask the manufacturer about that or ask on Audio Science Review forum.
A good amp board for multiroom would be something like the Raspberry Pi DigiAMP+
https://www.raspberrypi.com/products/digiamp-plus/
The Multiroom receiver moOde uses does not have a volume control routine, it just receives audio packets and forwards them them on to the ALSA output thus volume control has to be via something external like ALSA Hardware volume or a physical volume control on the audio device.
IME most audio devices that have XMOS USB chipsets support ALSA hardware volume. It's odd that the Sabaj device apparently does not. You might want to ask the manufacturer about that or ask on Audio Science Review forum.
A good amp board for multiroom would be something like the Raspberry Pi DigiAMP+
https://www.raspberrypi.com/products/digiamp-plus/
