zzzap wrote: > When capturing S/PDIF or analog out whatever medium used will be hard to > compare. I've tried. Only usefull data I found is the clock and jitter > difference. And even that might not be of interest using a modern DAC. > > I duplicate the Alsa stream comming from Squeezelite. And then use > 'ffmpeg -f alsa -channels 2 -sample_rate 44100 -i loopout out.wav'. Let > me listen to the stream while recording rather than just output to file > direcly. > > This capture a bit perfect stream using WAV media. Implying the capture > mechanism is sane. Where there are not even jitter or phase diffrense > between the original WAV file and the captured WAV file. > Also the FLAC file manually dekodet with 'flac -d' reproduce bit perfect > result when streamed back. Therefore any lossless output from > Squeezelite through Alsa should then be able to compare with DeltaWave > as it where a WAV file. > > But FLAC differs in manner I don't understand. As in why are there gain > different? Are the trancoder doing some kind of resampling under the > hood? And can we get rid of this for FLAC? > I have volume disabled and replay gain off. Only thing I've not testet > is to strip the FLAC file from RG tags. I'll do that and post if it > makes a difference.Have you examined the waveforms in Audacity to see if you > can see any difference when zoomed in to individual samples?
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