The volume on the HDMI ARC port is too low

[Martin13]

I mainly use the Wiim Amp with my TV.
Unfortunately, the television sound is transmitted too quietly via the HDMI ARC port.
The sound source is a SAT receiver. If I set the output to “Bitstream”, the sound is great, but then I have no sound at all on some channels (RTL, Vox).
If I set the output of the SAT receiver to “PCM”, everything works, but there is a massive loss of volume. In conjunction with Bluetooth headphones on the Wiim Amp, almost nothing works.

It would therefore be very helpful if greater preamplification were possible. So far I have made full use of the possible 10 DB. With a digital signal this should be possible without causing quality problems.


Martin

 

[Burnside]

You can set pre gain on that input under audio input in your device settings to see if that helps

 

[Martin13]

I have already used the possible 10db pre-amplification. I need a little more preamplification.

 

[DRC]

My Sony TV has a “digital audio out volume” for PCM. You might want to check if your TV has such a setting.

 

[harkpabst]

I think the problem is most likely with the transmitter, not the receiver. I second the idea of checking the TV's audio output settings.

Digital amplification is not entirely "free", it can increase the noise floor. In many cases it makes sense and I was very happy when WiiM introduced pre-gain. Fortunately, they decided not to limit it to negative gain. If you know for sure that your source is always far from 0 dBFS, digital gain is very useful. Of course, if this assumption is ever violated, you can end up with hard digital clipping. 10 dB is actually quite a lot of gain, already.