sbp wrote: > > It might be that your ALSA mixer output is set too high. > > Please try to shh into your piCorePlayer then: > "alsamixer" > reduce the output level to a suitable level > store the new settings: "sudo alsactl store" > backup the changes: "sudo filetool.sh -b" > and finally on the piCorePlayer Tweaks page select "Custom" Alsa output > level. > > Steen >
Thank you for your reply. I did testing last night and believe I know partly what was happening -- interference, of all things. My condo complex was built less than 200 meters from one of Madison's television stations and their broadcast antenna. I've always had issues with FM/AM radio reception because the power of the signal of that antenna overwhelms more distant signals. Last night I tried to get my room as quiet as possible so I could listen to what was going on at the place where I wanted to use the RPi/Hifiberry/piCorePlayer. And I heard faintly distorted voices coming from the radio speakers with no radio playing nor with my Logitech Media Server playing through the piCorePlayer!!! Well ... I can only assume that the cabling, etc. are susceptible to broadcast signal power bleeding into the circuitry. So, I grabbed another RCA cable set and plugged the piCorePlayer into a different stereo with RCA inputs and the "noise" has abated considerably. I hear no "voices" even with amplifier power set high. Excellent! I posted as well to the Hifiberry forum and one of their developers responded with a recommendation about output level as well. He said, "HiFiBerry team, Today at 01:21 ... If you reduce the volume to zero in piCorePlayer, you basically turn off the digital input, but this doesn't have any impact on the analog noise floor. If you then even raise the volume on the amplifier, you will hear noise. In general I recommend to run the DAC+ at the maximum volume and reduce the volume with the volume control on your amplifier. This is the way that will provide the best signal-to-noise ratio. The power supply can have an impact on noise, but even with a bad power supply the noise floor should be at least 70dB (usually much more) under the signal volume, if you run the DAC+ at full volume." It may be that the two of you are talking about different things, which is why I mention it. I asked Daniel for clarification of what he means by "run the DAC+ at full volume." I know that alsamixer will have multiple output controls (PCM, Master, etc.). To which of these do you refer when you say "ALSA mixer output is set too high?" Thanks again. ------------------------------------------------------------------------ gstalnaker's Profile: http://forums.slimdevices.com/member.php?userid=63504 View this thread: http://forums.slimdevices.com/showthread.php?t=105018 _______________________________________________ unix mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/unix
