zzzap wrote: > Thanks @bpa. More to digest. The tee command can prove useful to compare > Ogg/FLAC stream to ffmpeg capture at alsa output. Ahh of course, > directing the convertion to an application of own making opens up many > possibilities. Thanks, inspires to think of new ways of using LMS. > > With data corruption I'm thinking at byte level not interupting the > stream. As in why does DeltaWave find 1 dB difference in RMS level and > still return 40% bit accuratsy? I would expect it to be null when > amplitude differs. And why would higher frequencies be less accurate? > > THE BIG ELEPHANT IN THE ROOM ARE OF COURSE IF DELTAWAVE RESULTS ARE TO > BE TRUSTED [/B]WITH CURRENT SETUP. > > NOW BANGING AT THIS FOR A COUPLE OF DAYS AND NOW WITH SEVERAL DIFFERENT > REFERENCE FILES LATER A PATTERN SEEM TO EMERGE. TODAY I WHERE ACTUALLY > ABLE TO HAVE DELTAWARE SOMETIMES REPORT BIT PERFECT CAPTURES FROM FLAC > FILES. > WHEN THIS HAPPENS DELTAWARE USE MUCH LESS TIME TO COME TO THIS > CONCLUSION. OFTEN BUT NOT ALWAYS IT WARNS IT CHANGE METHODS TO ALIGN THE > TRACKS FOR COMPARISON AND WOULD SPEND LONGER TIME BEFORE FINISHING. AND > WHEN THIS HAPPEN IT IS MORE LIKELY THE COMPARANCE WILL SHOW LESS > ACCURACY. > > NOW IF DELTAWAVE FAILS TO ALIGN THE TWO FILES IT COMPARES THIS COULD > HELP EXPLAIN THE STRANGE RESULTS MENTIONED ABOVE. ALTHOUGH MY THINKING > PCM DATA SHOULD BE EXACTLY THE SAME WHERE ONLY TIME DOMAIN WITH VARYING > CLOCK ON THE CAPTURE COULD ADD TO THE COMPLEXITY. > > > [B]IF OTHERS WOULD TAKE PART IN DEBUNKING MY FINDINGS HERE IS MY SETUP. > > RPi3 running lateset RPi-OS and Squeezelite v1.9.8-1317 installed from > 'apt'. > LMS 8.3.0 on dedicated RPi3 with RPi-OS > > Tools used: > DeltaWave 2.0.4 https://deltaw.org/ > > To capture the stream I use > ~$ ffmpeg -f alsa -channels 2 -sample_rate 44100 -i loopout > fromFLAC.wav > with /etc/asound.conf copied from bottom of this page > https://trac.ffmpeg.org/wiki/Capture/ALSA > > Squeezelite output > /etc/default/squeezelite > SL_SOUNDCARD=default > > I record 2 minuttes and use the original FLAC file as Reference in > DeltaWave where I calculate the End for this file to be approx same > lenght as the recording.
I am just starting to have a look at this and I don't seem to have /etc/asound.conf Did you create it? Sent from my Pixel 3a using Tapatalk ------------------------------------------------------------------------ slartibartfast's Profile: http://forums.slimdevices.com/member.php?userid=35609 View this thread: http://forums.slimdevices.com/showthread.php?t=117152 _______________________________________________ Squeezecenter mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/squeezecenter
