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. ------------------------------------------------------------------------ zzzap's Profile: http://forums.slimdevices.com/member.php?userid=31947 View this thread: http://forums.slimdevices.com/showthread.php?t=117152 _______________________________________________ Squeezecenter mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/squeezecenter
