Re: Can lossy high resolution outperform lossless at standard resolution?
Reply #29 – 2024-04-01 20:44:47
If I summarize:Using Vorbis at 500 kbps and 192.000 Hz is probably not a good thing Keeping 192.000 Hz is a total waste of space: no information but noise on all recordings I tried (and most of them are modern and state-of-the-art recordings from the last three years 96.000 Hz is from an perceptual point of view the same waste, but from a technical point of view the upper frequencies contains real information (but of course not audible) At the moment I wasn't able to create a TransPCM file (I quickly gave up I admit, it's low on my priority list At the moment I have some issues with HR files and LossyFLAC: Nick is checking I was able to gather some bitrate data for FSLAC, WavPack Lossy and resampled/dithered FLAC An excel file is available at the bottom. At the moment, the possible formats of choice are:FSLAC: FSLAC -2 is probably a bit low on quality but bitrate = 640 kbps at 96.000 Hz! ; FSLAC -3 = 1200 kbps at 96.000. Not a real competitor (not tuned for 24 bit) but for curiosity only. WavPack lossy -4: 800 kbps at 96.000 Hz. Not too far from my classical Red Book bitrate. Very minor risk of artifact/noise WavPack lossy -3: 590 kbps, which is exactly my usual bitrate for classical Red Book 16/44100. But how often is it not transparent? FLAC: resampled to 48000 and 20 bit = 1000 kbps. Not bad. A few improvements over Red Book (+4000 Hz, +4bit) and decent bitrate. No fear of artifact or noise FLAC: resampled to 54000 and 19 bit = 1000 kbps. Not bad either (+10.000Hz and +3bit over RedBook). FLAC: resampled to 54000 and 18 bit = 900 kbps. (+10.000Hz and +2bit over RedBook). An interesting start would be to check (if possible) if FLAC 16/44100 is better than WAVPACK LOSSY at 96.000 Hz (b3 setting). Both have a very similar bitrate for classical music at least. Another choice would be to choose something in the ~1000 kbps, between pure FLAC at odd sampling rate and bitdepth and WavPack, and probably LossyFLAC at similar bitrate.
Wavpack Hybrid: one encoder, one encoding for all scenarios WavPack -c4.5hx6 (44100Hz & 48000Hz) ≈ 390 kbps + correction file WavPack -c4hx6 (96000Hz) ≈ 768 kbps + correction file WavPack -h (SACD & DSD) ≈ 2400 kbps at 2.8224 MHz