Here are the results of some experimentation.
Steps:
- Plug in Loxjie D30 via USB into the Raspberry Pi 4B running Moode 9.2.5 2025-02-23.
- In Moode settings, set the D30 to the output device and select hardware volume.
- Play some music and adjust volume to comfortable listening level. For my headphones, this was "45 (-21dB)" in Moode's web UI.
- Switch OFF D30 by holding down physical volume knob on front panel.
- Switch ON D30 by again holding down the physical volume knob.
- Press play on Moode's web UI.
- Now no audio is heard. Complete silence. This is unexpected to me.
- If you go to Moode's volume panel in the web UI it displays "45 (-127dB)"
- If you adjust the volume in Moode's web UI to anything other than the current value, audio comes back.
I was unable to reproduce this with more basic dongles like the Samsung USB C to 3.5mm dongle (which Moode doesn't offer the option of hardware volume control for) or the Venture Electronics Abigail Pro. For the latter, Moode offered me a hardware volume control setting, which when used worked flawlessly even after disconnecting and reconnecting.
Another thing I noticed with the Loxjie D30 when used with "hardware" volume control, is that setting the volume in the Moode web UI doesn't update the D30's volume on its front panel screen. From this I conclude that Moode isn't changing the hardware volume of the D30 after all. Or perhaps the D30 has two hardware volume controls, one controlled by the knob, another controlled by the USB host. Not really sure.
After this I thought "oh well, let's just set Moode to fixed volume and I can just use the D30 remote control". Sadly the "no audio" problem still presents when you turn the D30 off and on, but this time because there is no volume control to speak of in the Moode web UI, you can't adjust the volume to get the audio back!
What do you reckon? Some quirk with the way the hardware volume control works on the D30? Is there anything I can try?
Steps:
- Plug in Loxjie D30 via USB into the Raspberry Pi 4B running Moode 9.2.5 2025-02-23.
- In Moode settings, set the D30 to the output device and select hardware volume.
- Play some music and adjust volume to comfortable listening level. For my headphones, this was "45 (-21dB)" in Moode's web UI.
- Switch OFF D30 by holding down physical volume knob on front panel.
- Switch ON D30 by again holding down the physical volume knob.
- Press play on Moode's web UI.
- Now no audio is heard. Complete silence. This is unexpected to me.
- If you go to Moode's volume panel in the web UI it displays "45 (-127dB)"
- If you adjust the volume in Moode's web UI to anything other than the current value, audio comes back.
I was unable to reproduce this with more basic dongles like the Samsung USB C to 3.5mm dongle (which Moode doesn't offer the option of hardware volume control for) or the Venture Electronics Abigail Pro. For the latter, Moode offered me a hardware volume control setting, which when used worked flawlessly even after disconnecting and reconnecting.
Another thing I noticed with the Loxjie D30 when used with "hardware" volume control, is that setting the volume in the Moode web UI doesn't update the D30's volume on its front panel screen. From this I conclude that Moode isn't changing the hardware volume of the D30 after all. Or perhaps the D30 has two hardware volume controls, one controlled by the knob, another controlled by the USB host. Not really sure.
After this I thought "oh well, let's just set Moode to fixed volume and I can just use the D30 remote control". Sadly the "no audio" problem still presents when you turn the D30 off and on, but this time because there is no volume control to speak of in the Moode web UI, you can't adjust the volume to get the audio back!
What do you reckon? Some quirk with the way the hardware volume control works on the D30? Is there anything I can try?
