moOde 7.5.0 with RoonBridge and Soekris dam1021

[maikel76]

Does the Soekris DAM 1021 DAC expose volume control via its I2S interface?

When I read the (pathetically brief) manual all I see is

FEATURES
The initial rev 0.90 release of the firmware together enables the following features:
...
4. Digital volume control through simple potentiometer
...
8. S/W interface (serial interface) allows:
.       1. Volume control (e.g. with Arduino)
.       2. Input selection (e.g. with Arduino)
.       3. Loadable FIR filters including bypass filter for NOS support (s/w utility included)
.       4. Firmware update/upgrade 

It appears there are knowledgeable Soekris users actively participating on other forums, e.g., diyaudio.com and community.roonlabs.com. You might get quicker responses there.

Regards,
Kent

Hi Kent,
Sorry I totally missed your reply. I can acknowledge that with a serial command like

Code:

echo  "V-90\r\n" > /dev/serial0
echo  "V-0\r\n" > /dev/serial0

you can change the volume to low and high. I connected the dam to a raspberry pi through I2S and this is working.
Tonno made a change in the vol.sh script in /var/www and I changed it to the latest release, that's working within moOde like a charm.
However I would like to use Roon for this, so roonbridge. Roon has an api and i think i can change it with this, however, the volume control options are not shown in the roon app because roon(bridge) connects to ALSA and there are no volume control options there (what Tim explained)

I can also confirm there is an topic where Soren (Soekris) reads. If you want to know where please let me know
I just bricked my dam last friday-night trying to update firmware on linux which honestly is a complete nightmare. The update produced some errors and then just stopped, leaving an unreachable dam left. Luckily I should be able to reset it so I'm gonna try that somewhere tomorrow