Hi Klaus, To go after this, it would be useful to measure the discrepancy for some number of sinusoidal frequencies across the audio band, with at least one example including both single-channel and multichannel input. Based on the filter approximations used, I would predict a measurable discrepancy around 1 kHz (guessed transition-frequency tuning), and very high frequencies (due to bilinear transform frequency-warping).
The high-frequency discrepancy should go away with oversampling, even 2x. Glad to hear noise is looking good! - Julius On Sat, Jul 3, 2021 at 1:08 AM Klaus Scheuermann <kla...@posteo.de> wrote: > > Hello everyone :) > > Would someone be up for helping me implement an LUFS loudness analyser > in faust? > > Or has someone done it already? > > LUFS (aka LKFS) is becoming more and more the standard for loudness > measurement in the audio industry. Youtube, Spotify and broadcast > stations use the concept to normalize loudness. A very positive side > effect is, that loudness-wars are basically over. > > I looked into it, but my programming skills clearly don't match > the level for implementing this. > > Here is some resource about the topic: > > https://en.wikipedia.org/wiki/LKFS > > Specifications (in Annex 1): > https://www.itu.int/dms_pubrec/itu-r/rec/bs/R-REC-BS.1770-3-201208-S!!PDF-E.pdf > > An implementation by 'klangfreund' in JUCE / C: > https://github.com/klangfreund/LUFSMeter > > There is also a free LUFS Meter in JS / Reaper by Geraint Luff. > (The code can be seen in reaper, but I don't know if I should paste it > here.) > > Please let me know if you are up for it! > > Take care, > Klaus > > > _______________________________________________ > Faudiostream-users mailing list > Faudiostream-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/faudiostream-users -- "Anybody who knows all about nothing knows everything" -- Leonard Susskind _______________________________________________ Faudiostream-users mailing list Faudiostream-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/faudiostream-users
