RoyB wrote:...
@janui or others. Please enlighten how the Sound Signature tweaks may affect the sound. What is the experience of other RuneAudio users with RuneAudio 0.6b?
There are some changes in 0.6b which may cause a change of sound quality.
1. There are routines which now detect a hardware mixer, this is automatically selected if applicable. Previously this was determined by a limited pre-defined set of parameters and correctly selecting the option by the user.
2. There were bugs in the old sound signature code. It was not documented, but a reboot was required to fully set up a new profile. This made it very difficult to compare the effects of a change. You can now change the signatures on-the-fly.
3. The kernel has changed. Some parts of the old tweaks are no longer supported. But there are new and changed schedulers which determine how cpu resources are allocated to processes.
4. In 0.5d there were no sound signatures specifically designed for the multiprocessor Pi models. In 0.6b all signatures have a default multiprocessor setup. There are also a couple of signatures specifically designed for these multiprocessor Pi's.
5. For some audio cards which have limitations for sample rate and bit depth processing there are improved MPD settings which force MPD to use SoXr resampling instead of relying on default alsa resampling.
For your DigiOne the points 1, 2, 3 and 4 could be influencing the sound quality. If you are using a multi-processor Pi, it worth trying the following sound profiles: RuneAudio, Dynabot, Frost_dk and janui. As before the effects vary per processor type and sound card, and 'quality' is very much based on personal preference. You really need to do 'blind testing' to be objective about results.
janui
