Woofer problem in 5.1 analogic audio equipment

Help and Support Raspberry Pi
1

Hello everyone,

My OSMC is on a PI3 B, I’ve connected it with CM106 USB audio device, also I have this device HDMI output,

The problem is that I hardly listen a murmur from the woofer speaker output, I think, I’ve tried every audio configurations and combinations,

CM106 with alsa and pulseaudio
PI HDMI, via HDMI
PI analog
bcm2835 alsa

5.1 + passthrough (DTS, AC3)
5.1 without passthrough
2.0 + passthrough (DTS, AC3)

I’ve turned the woofer channel volume up form aslamixer.

Most of the cases I got 2.0 or 5.0, the sound is fine but woofer never work (of course the speaker is OK).
I also appreciate any comments or feedback.

Thanks.

2

Hi,

Make sure output configuration is set to best matched.

Thanks Tom.

3

Thanks for your reply.

I did it with the same results.

On the other hand I installed Libreelec but the woofer behavior is the same and it continued murmuring.

4

Hi,

Long shot, but it try the numbers to 7.1 and letting the HDMI Decodificador do the processing to 5.1

Thanks Tom.

5

I just checked on a Pi3+ with my Cmedia USB soundcard. I had to remove pulseaudio and set the soundcard to its U2 (HD) mode, but then everything was fine.

If you can get debug logs, we could have a closer look for you. How to submit a useful support request

6

Ok,

I try with the Tom_Doyle add but nothing change.

I purged pulseaudio, I configured USB soundcard enabling passthrough options, the sound in good in the 5 first channels and the murmur remains in woofer channel.
This is the full log file.
https://paste.osmc.tv/dotetutuhi

7

Did you tried the USB Soundcard connected to e.g. your PC to ensure the Hardware is fine?

8

I have the same problem when I unplug the audio device and I use PI HDMI out, with and without passthrough.

9

Well eventually It was a hardware problem, I thrown away the CN106 sound card and I used the other device optical output to get 5.1 signal.

Thanks and sorry for all.

1 Like