I took the freedom to compile an excerpt of the extensive compression results which m² has posted in the Alpha thread.
His notes:
All samples come from DVD-A discs and are 5.1
Albums:
Sting - Brand New Day (samples d*, r*), 24/48
Nightwish - Dark Passion Play (a*), 24/48
Ton Koopman - Bach: Organ Spectacular (t*), 24/96
Foreigner - 4 (u*, v*, w*), 24/96
Codecs:
als rm23 (-7, other switches as indicated)
flake SVN r264 (-12)
wavpack 4.60.1
ttaenc 3.4.1
tak 2.2.0 (-p4m -wm0)
The 24/48 results:
a0 a1 a3 a4 d0 d2 d3 d4 d5 d6 r0 r1 r2 r3
WavPack -hx4 58,88 66,86 60,53 67,12 33,08 39,28 48,57 48,81 47,97 52,46 41,06 49,60 52,68 52,42
WavPack -hx6 58,84 66,86 60,49 67,12 32,98 39,07 48,18 47,98 47,40 51,61 40,84 48,79 51,63 51,52
WavPack -hhx6 58,79 66,83 60,44 67,09 32,76 38,79 47,74 47,58 47,09 51,12 40,51 48,37 51,18 51,07
Flake -12 58,33 66,01 60,25 66,25 32,82 37,46 47,63 47,59 46,96 50,97 40,77 48,45 51,11 51,16
TTA 65,76 74,80 66,77 74,94 51,35 55,96 67,49 66,45 66,50 71,47 63,61 70,14 72,08 73,33
TAK -p4m 56,78 64,59 58,36 64,93 30,79 34,68 44,71 43,74 44,20 47,94 37,92 45,99 47,80 49,42
Als -7 -o160 -t6 56,61 64,45 58,23 64,78 30,52 34,24 44,44 44,02 43,84 47,85 38,30 46,02 47,89 48,87
Als -7 -o1023 -t6 56,43 64,37 58,13 64,72 30,18 33,99 44,43 43,99 43,78 47,84 38,25 45,98 47,83 48,79
Als -z3 -t6 57,55 65,68 59,62 65,89 42,89 47,52 58,93 57,99 57,91 61,81 50,45 59,03 61,46 63,11
Compression ratio expressed as percentage of the original size.
The 24/96 results:
t0 t1 t2 t3 u0 u1 u2 u3 v0 v1 w0 w1 w2 w3 w4
WavPack -hx4 47,91 48,00 46,94 48,16 58,05 59,77 59,43 60,70 47,34 55,27 50,10 57,34 59,08 60,37 61,71
WavPack -hx6 47,89 47,99 46,94 48,16 57,97 59,69 59,33 60,57 47,23 55,22 50,00 57,26 58,98 60,31 61,68
WavPack -hhx6 47,88 47,97 46,93 48,16 57,32 59,11 58,77 59,92 46,66 54,70 49,49 56,86 58,52 59,92 61,37
Flake -12 47,73 47,87 46,96 48,21 56,79 58,62 58,18 59,36 46,01 53,91 48,81 55,89 57,48 59,00 60,81
TTA 49,61 49,66 48,69 49,87 66,98 69,26 68,71 70,62 55,04 63,73 59,10 66,16 67,55 69,29 71,25
TAK -p4m 42,80 43,10 41,94 43,01 55,73 57,72 57,33 58,46 45,23 52,62 47,82 54,92 56,30 57,94 59,95
Als -7 -o160 -t6 45,60 46,03 45,01 45,98 54,97 56,91 56,34 57,43 44,97 52,18 47,63 54,40 55,65 57,22 59,07
Als -7 -o511 -t6 45,26 45,76 44,78 45,53 54,97 56,91 56,34 57,42 44,94 52,19 47,27 54,36 55,65 57,17 59,05
Als -z3 -t6 41,22 41,96 41,07 41,92 60,96 62,86 62,30 63,24 50,94 58,03 53,28 60,33 61,66 63,11 64,85
m²'s comment:
Generally, TAK looses to ALS, but is rocket fast.
I haven't decided which one do I want to use yet...Really, I expected TAK to do better.
I feel quite comfortable with your results.
For the 24/48 samples the performance of TAK -p4m is quite similar to Als -7 -o160 -t6. TAK compresses the t-set of the 24/96 samples better than Als -7 -o160 -t6, but indeed looses on the Foreigner 4 samples u, v and w.
Would it be possible to send me one or two 30 second snippets of the Foreigner files, where ALS's advantage manifests? I would like to look for tuning opportunities.
BTW: Thank you very much for such an extensive evaluation!
Thomas