AAC beaten at low bitrates, why?
Reply #24 – 2002-08-06 21:53:59
Frank, I have a question who haunt me for month... I encode my classical music in mpc for month, and I noticed immediatly after leaving mp3 than Musepack had I « strange » behaviour with some instruments. Piano don't need too much bitrate, with mp3, mpc or Vorbis. But a violon (not a critical instrument ) seems overrated by mppenc : +20% (200 on --standard ; 230-240 on extreme, etc...). Harpsichord, organ... the same thing (a bit less fororgan, but harpsichord is more problematic). With --alt-preset standard, I obtain 180 kb/s, and never reached 200 kb/s : mp3 is very cool for classical listener who don't like Metallica. But with Musepack, Mozart need as much bitrate as AC/DC with mp3 encoding :mad: I recently find a strange and forgotten instrument, called glass harmonica : an horrible and distorded sound !!! Brrr... With --alt-preset standard, an adagio (quiet but awfull music) need only 150 kb/s ! With mpc --standard : 250 kb/s !!!! Why distorded music (harpischord, baroque instruments) are needing so much bitrate, and why heavy metal don't ? Can you, or someone else, help me to understand this big differences ? Thanks a lot [sorry for my poor expression, and thanks again for your job]
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