Network Details (Including networking gear model/manufacturer and if on WiFi/Ethernet)
Ethernet/Sotm 200Ultra
Audio Devices (Specify what device you’re using and its connection type - USB/HDMI/etc.)
Chord M Scaler (USB)/Chord Dave (Dual BNC)
Description Of Issue
Chord M Scaler has ‘auto standby’ feature which puts it in low power mode when nothing is being played for 10 minutes. This works fine when PCM data is sent via Roon. However when DSD is used and the last track is DSD it seems Roon does not inform M Scaler that there is no more music. This prevents M Scaler to enter the standby mode.
Can you please reproduce this issue and note the exact local time + date + last track played when this occurs? To clarify, there should be two timestamps + tracks you note:
When you have the last track playing PCM content and the Scalar goes to sleep
When the last track played is DSD and the Scalar doesn’t sleep
Once I have this info I can enable diagnostics mode and take a look to see if the sleep commands on the Roon side are different based on content type played last.
M Scaler immediately recognized there is no more signal and the led indicating source bit rate is turned off. 10 mins later M scaler enters stand by mode
08/04 at 20:31 CEST
finished DSD128 track (Queue is empty now)
same result like on PCM, the source indicator led is turned off. Didn’t wait here 10 mins, but it would turn offf.
08/04 at 20:33 CEST
finished DSD512 track (Queue is empty now)
M Scaler is still indicating with the led the source dsd type, so it thinks data is still flowing in. 10 mins later the led is still on and M Scaler does not switch to stand by mode
DSD512 is not played directly but down-sampled by Roon to DSD256 as Sotm200Ultra is linux based streamer and Chord doesn’t have support for Native DSD playback on linux
08/04 at 20:45 CEST
finished DSD256 track (Queue is empty now)
same issue as DSD512, source indicator led stays on, so M Scaler still thinks data is flowing and won’t enter stand by mode
08/04 at 20:48 CEST
finished DSD64 track (Queue is empty now)
same as PCM and DSD128, Source indicator is turned off and in 10 mins M Scaler goes in stand by.
So it turns out the issue happens only on DSD256 and DSD512
Thank you for your further testing here! I have activated diagnostics mode and what this action does is automatically upload a log set to our servers for analysis. I can confirm that the log report has been received and I have passed it on to the technical team for further analysis.
Looking at your logs, it shows that the Roon to ALSA (Linux driver) interactions are the same regardless of the format being played. In all cases we can see the [alsa] teardown trace at the end of playback, indicating that Roon has released its hold on the audio device.
Any device behavior that occurs after Roon has released it’s hold on the audio device is not related to Roon, so unfortunately there is nothing we can do here.
Thank you for analyzing the issue. I have now contacted SOtM support and they are reviewing it now on their side. I will let you know when I have some news.