Josef Pohm's Lossless Codec Comparison

A Brief Introduction by Synthetic Soul

The following comparison uses data collated by Josef Pohm, displayed using the system that I created to report my brief test results. One need only compare the tables to note that Josef has performed a great deal more testing, which is why I have persuaded him to let me publish his work. All subsequent text is Josef's.

Summary

The table below shows a summary of all files in the test corpus.

Use the column headers to sort the table. Clicking on an encoder setting will take you to a page detailing the encoder and setting used, with the individual results for each file in the test corpus encoded using that encoder setting.

	File Size				Encoding		Decoding
Encoder Setting	Original	Compressed	Duration	Compression	Time	Rate	Time	Rate
Alac DBPA Default	461.79 MiB	290.58 MiB	00:45:45.000	62.925%	00:01:15.012	36.59x	00:01:04.155	42.79x
Alac Itunes Default	461.79 MiB	284.15 MiB	00:45:45.000	61.534%	00:01:39.687	27.54x	00:00:55.272	49.66x
A-Pac Default	461.79 MiB	316.93 MiB	00:45:45.000	68.632%	00:03:25.297	13.37x	00:01:49.558	25.06x
Bonk JS Predictor 128	461.79 MiB	291.03 MiB	00:45:45.000	63.024%	00:15:02.123	3.04x	00:10:53.397	4.20x
Bonk JS Predictor 16	461.79 MiB	287.95 MiB	00:45:45.000	62.355%	00:04:02.803	11.31x	00:03:34.180	12.82x
Bonk JS Predictor 32	461.79 MiB	288.28 MiB	00:45:45.000	62.426%	00:05:27.686	8.38x	00:04:30.439	10.15x
Bonk JS Predictor 4	461.79 MiB	291.72 MiB	00:45:45.000	63.172%	00:02:48.778	16.26x	00:02:48.778	16.26x
Bonk JS Predictor 64	461.79 MiB	289.27 MiB	00:45:45.000	62.641%	00:08:15.476	5.54x	00:06:36.776	6.92x
Bonk JS Predictor 9	461.79 MiB	288.51 MiB	00:45:45.000	62.478%	00:03:15.427	14.05x	00:03:14.440	14.12x
DaxWav VQH	461.79 MiB	323.72 MiB	00:45:45.000	70.102%	00:00:46.998	58.41x	00:00:21.996	124.80x
DaxWav VQM	461.79 MiB	323.29 MiB	00:45:45.000	70.008%	00:00:44.001	62.38x	00:00:23.004	119.33x
DaxWav VQS	461.79 MiB	321.25 MiB	00:45:45.000	69.568%	00:03:18.999	13.79x	00:00:21.996	124.80x
Flac -0	461.79 MiB	306.79 MiB	00:45:45.000	66.435%	00:00:37.586	73.03x	00:00:33.203	82.67x
Flac -1	461.79 MiB	302.41 MiB	00:45:45.000	65.487%	00:00:39.648	69.23x	00:00:34.357	79.90x
Flac -2	461.79 MiB	301.54 MiB	00:45:45.000	65.299%	00:00:47.988	57.20x	00:00:34.259	80.12x
Flac -3	461.79 MiB	291.19 MiB	00:45:45.000	63.058%	00:00:56.565	48.53x	00:00:35.582	77.15x
Flac -4	461.79 MiB	283.76 MiB	00:45:45.000	61.449%	00:01:17.599	35.37x	00:00:36.993	74.20x
Flac -5	461.79 MiB	283.52 MiB	00:45:45.000	61.395%	00:01:37.713	28.09x	00:00:36.697	74.80x
Flac -6	461.79 MiB	283.34 MiB	00:45:45.000	61.358%	00:01:43.240	26.59x	00:00:36.469	75.27x
Flac -7	461.79 MiB	283.09 MiB	00:45:45.000	61.303%	00:04:43.863	9.67x	00:00:37.536	73.13x
Flac -8	461.79 MiB	282.08 MiB	00:45:45.000	61.085%	00:06:07.245	7.47x	00:00:38.148	71.96x
Flac -8 (l30 - r0,8)	461.79 MiB	281.47 MiB	00:45:45.000	60.953%	00:19:23.550	2.36x	00:00:40.497	67.78x
Flac - CVS -0	461.79 MiB	306.79 MiB	00:45:45.000	66.435%	00:00:37.733	72.75x	00:00:33.262	82.53x
Flac - CVS -1	461.79 MiB	302.41 MiB	00:45:45.000	65.487%	00:00:40.053	68.53x	00:00:35.355	77.64x
Flac - CVS -2	461.79 MiB	301.54 MiB	00:45:45.000	65.299%	00:00:49.123	55.88x	00:00:35.088	78.23x
Flac - CVS -3	461.79 MiB	288.17 MiB	00:45:45.000	62.404%	00:01:01.846	44.38x	00:00:35.572	77.17x
Flac - CVS -4	461.79 MiB	280.50 MiB	00:45:45.000	60.742%	00:01:24.113	32.63x	00:00:36.815	74.56x
Flac - CVS -5	461.79 MiB	280.09 MiB	00:45:45.000	60.654%	00:01:48.235	25.36x	00:00:36.983	74.22x
Flac - CVS -6	461.79 MiB	279.93 MiB	00:45:45.000	60.618%	00:01:54.838	23.90x	00:00:36.440	75.33x
Flac - CVS -7	461.79 MiB	279.24 MiB	00:45:45.000	60.470%	00:04:54.147	9.33x	00:00:37.220	73.75x
Flac - CVS -8	461.79 MiB	277.37 MiB	00:45:45.000	60.064%	00:06:21.971	7.19x	00:00:37.417	73.36x
Flac - CVS -8 (l30 - r0,8)	461.79 MiB	275.98 MiB	00:45:45.000	59.764%	00:18:58.461	2.41x	00:00:40.803	67.27x
Flac - Garf -0	461.79 MiB	306.79 MiB	00:45:45.000	66.435%	00:00:34.338	79.94x	00:00:26.698	102.81x
Flac - Garf -1	461.79 MiB	302.41 MiB	00:45:45.000	65.487%	00:00:35.364	77.62x	00:00:28.307	96.97x
Flac - Garf -2	461.79 MiB	301.54 MiB	00:45:45.000	65.299%	00:00:43.428	63.21x	00:00:28.209	97.31x
Flac - Garf -3	461.79 MiB	288.33 MiB	00:45:45.000	62.438%	00:00:57.256	47.94x	00:00:29.748	92.27x
Flac - Garf -4	461.79 MiB	280.85 MiB	00:45:45.000	60.817%	00:01:18.062	35.16x	00:00:31.535	87.05x
Flac - Garf -5	461.79 MiB	280.37 MiB	00:45:45.000	60.715%	00:01:38.829	27.78x	00:00:31.515	87.10x
Flac - Garf -6	461.79 MiB	280.21 MiB	00:45:45.000	60.680%	00:01:45.383	26.05x	00:00:30.498	90.00x
Flac - Garf -7	461.79 MiB	279.41 MiB	00:45:45.000	60.506%	00:04:09.959	10.98x	00:00:31.614	86.83x
Flac - Garf -8	461.79 MiB	277.63 MiB	00:45:45.000	60.120%	00:05:17.707	8.64x	00:00:31.712	86.56x
Flac - Garf -8 (l30 - r0,8)	461.79 MiB	276.36 MiB	00:45:45.000	59.846%	00:15:47.387	2.90x	00:00:34.348	79.92x
Flake 0	461.79 MiB	309.77 MiB	00:45:45.000	67.082%	00:01:14.276	36.96x	00:00:27.977	98.11x
Flake 1	461.79 MiB	293.19 MiB	00:45:45.000	63.491%	00:01:24.145	32.62x	00:00:27.947	98.22x
Flake 10	461.79 MiB	271.47 MiB	00:45:45.000	58.788%	00:04:48.156	9.53x	00:00:44.458	61.74x
Flake 11	461.79 MiB	269.53 MiB	00:45:45.000	58.366%	00:21:31.326	2.13x	00:00:41.623	65.95x
Flake 12	461.79 MiB	269.96 MiB	00:45:45.000	58.460%	00:05:06.863	8.95x	00:00:59.370	46.24x
Flake 13	461.79 MiB	268.83 MiB	00:45:45.000	58.216%	00:21:31.466	2.13x	00:00:58.050	47.29x
Flake 14	461.79 MiB	269.88 MiB	00:45:45.000	58.442%	00:05:51.299	7.81x	00:01:06.797	41.09x
Flake 15	461.79 MiB	269.33 MiB	00:45:45.000	58.324%	00:24:38.350	1.86x	00:01:06.045	41.56x
Flake 2	461.79 MiB	288.74 MiB	00:45:45.000	62.527%	00:01:23.340	32.94x	00:00:27.940	98.24x
Flake 3	461.79 MiB	283.79 MiB	00:45:45.000	61.455%	00:01:26.693	31.66x	00:00:28.363	96.78x
Flake 4	461.79 MiB	281.26 MiB	00:45:45.000	60.907%	00:01:27.076	31.52x	00:00:29.415	93.32x
Flake 5	461.79 MiB	278.82 MiB	00:45:45.000	60.378%	00:01:32.531	29.67x	00:00:29.954	91.64x
Flake 6	461.79 MiB	277.89 MiB	00:45:45.000	60.178%	00:02:32.246	18.03x	00:00:30.181	90.95x
Flake 7	461.79 MiB	277.72 MiB	00:45:45.000	60.139%	00:02:54.829	15.70x	00:00:30.400	90.30x
Flake 8	461.79 MiB	274.77 MiB	00:45:45.000	59.501%	00:03:17.713	13.88x	00:00:31.004	88.54x
Flake 9	461.79 MiB	274.45 MiB	00:45:45.000	59.433%	00:06:04.023	7.54x	00:00:30.472	90.08x
LA High	461.79 MiB	251.67 MiB	00:45:45.000	54.499%	00:18:38.277	2.45x	00:15:43.577	2.91x
LA Normal	461.79 MiB	252.72 MiB	00:45:45.000	54.727%	00:13:41.188	3.34x	00:11:23.007	4.02x
LiteWave Default	461.79 MiB	322.97 MiB	00:45:45.000	69.939%	00:01:29.817	30.56x	00:01:18.960	34.76x
LPAC ExtraHigh	461.79 MiB	264.69 MiB	00:45:45.000	57.318%	00:04:01.816	11.35x	00:01:37.713	28.09x
LPAC Fast	461.79 MiB	305.90 MiB	00:45:45.000	66.244%	00:00:44.415	61.80x	00:00:58.233	47.14x
LPAC High	461.79 MiB	265.15 MiB	00:45:45.000	57.418%	00:03:07.531	14.64x	00:01:28.830	30.90x
LPAC Normal	461.79 MiB	265.98 MiB	00:45:45.000	57.599%	00:02:29.038	18.42x	00:01:14.025	37.08x
LPAC Simple	461.79 MiB	268.60 MiB	00:45:45.000	58.165%	00:02:07.324	21.56x	00:01:05.142	42.14x
Monkey ExtraHigh	461.79 MiB	257.14 MiB	00:45:45.000	55.685%	00:03:28.258	13.18x	00:03:32.206	12.94x
Monkey Fast	461.79 MiB	278.37 MiB	00:45:45.000	60.280%	00:01:05.142	42.14x	00:01:12.051	38.10x
Monkey High	461.79 MiB	264.67 MiB	00:45:45.000	57.314%	00:01:43.636	26.49x	00:01:49.558	25.06x
Monkey Insane	461.79 MiB	255.81 MiB	00:45:45.000	55.395%	00:11:49.657	3.87x	00:11:51.631	3.86x
Monkey Normal	461.79 MiB	267.18 MiB	00:45:45.000	57.857%	00:01:27.843	31.25x	00:01:33.765	29.28x
MP4 ALS -7	461.79 MiB	254.72 MiB	00:45:45.000	55.160%	01:11:17.694	0.64x	00:06:48.803	6.71x
MP4 ALS -7 -n2560 -o128	461.79 MiB	257.34 MiB	00:45:45.000	55.727%	00:23:54.031	1.91x	00:03:06.879	14.69x
MP4 ALS -7 -n2560 -o32	461.79 MiB	260.47 MiB	00:45:45.000	56.404%	00:17:47.154	2.57x	00:02:04.272	22.09x
MP4 ALS -7 -n2560 -o64	461.79 MiB	258.59 MiB	00:45:45.000	55.998%	00:21:34.692	2.12x	00:02:33.718	17.86x
MP4 ALS -7 -p -t2	461.79 MiB	254.59 MiB	00:45:45.000	55.131%	04:51:57.183	0.16x	00:07:14.584	6.32x
MP4 ALS -a -i -n1536 -o1	461.79 MiB	330.32 MiB	00:45:45.000	71.531%	00:00:40.851	67.20x	00:00:32.504	84.45x
MP4 ALS -a -o128	461.79 MiB	260.78 MiB	00:45:45.000	56.472%	00:05:26.397	8.41x	00:02:12.687	20.69x
MP4 ALS -a -o16	461.79 MiB	269.22 MiB	00:45:45.000	58.299%	00:01:44.254	26.33x	00:00:53.783	51.04x
MP4 ALS -a -o2	461.79 MiB	298.74 MiB	00:45:45.000	64.692%	00:01:04.396	42.63x	00:00:35.461	77.41x
MP4 ALS -a -o32	461.79 MiB	263.74 MiB	00:45:45.000	57.112%	00:02:29.464	18.37x	00:01:11.374	38.46x
MP4 ALS -a -o4	461.79 MiB	285.02 MiB	00:45:45.000	61.722%	00:01:05.021	42.22x	00:00:38.532	71.24x
MP4 ALS -a -o64	461.79 MiB	261.90 MiB	00:45:45.000	56.714%	00:03:52.929	11.78x	00:01:40.279	27.37x
MP4 ALS -a -o8	461.79 MiB	276.12 MiB	00:45:45.000	59.793%	00:01:21.716	33.59x	00:00:46.168	59.46x
MP4 ALS - Garf -7	461.79 MiB	256.28 MiB	00:45:45.000	55.497%	01:04:11.991	0.71x	00:04:09.224	11.01x
MP4 ALS - Garf -7 -n2560 -o128	461.79 MiB	258.41 MiB	00:45:45.000	55.960%	00:18:56.354	2.42x	00:02:25.597	18.85x
MP4 ALS - Garf -7 -n2560 -o32	461.79 MiB	260.80 MiB	00:45:45.000	56.477%	00:13:50.921	3.30x	00:01:51.136	24.70x
MP4 ALS - Garf -7 -n2560 -o64	461.79 MiB	259.32 MiB	00:45:45.000	56.156%	00:16:33.019	2.76x	00:02:08.156	21.42x
MP4 ALS - Garf -7 -p -t2	461.79 MiB	256.06 MiB	00:45:45.000	55.450%	04:18:12.920	0.18x	00:04:35.249	9.97x
MP4 ALS - Garf -a -i -n1536 -o1	461.79 MiB	330.33 MiB	00:45:45.000	71.532%	00:00:31.731	86.51x	00:00:28.417	96.60x
MP4 ALS - Garf -a -o128	461.79 MiB	262.10 MiB	00:45:45.000	56.757%	00:04:01.445	11.37x	00:01:46.687	25.73x
MP4 ALS - Garf -a -o16	461.79 MiB	269.55 MiB	00:45:45.000	58.372%	00:01:19.228	34.65x	00:00:49.333	55.64x
MP4 ALS - Garf -a -o2	461.79 MiB	298.78 MiB	00:45:45.000	64.702%	00:00:48.540	56.55x	00:00:32.542	84.35x
MP4 ALS - Garf -a -o32	461.79 MiB	264.35 MiB	00:45:45.000	57.245%	00:01:55.148	23.84x	00:01:05.326	42.02x
MP4 ALS - Garf -a -o4	461.79 MiB	285.08 MiB	00:45:45.000	61.734%	00:00:48.530	56.56x	00:00:34.615	79.30x
MP4 ALS - Garf -a -o64	461.79 MiB	262.93 MiB	00:45:45.000	56.937%	00:02:53.130	15.86x	00:01:30.474	30.34x
MP4 ALS - Garf -a -o8	461.79 MiB	276.27 MiB	00:45:45.000	59.825%	00:01:00.678	45.24x	00:00:41.575	66.03x
MusiCompress Default	461.79 MiB	309.26 MiB	00:45:45.000	66.971%	00:00:39.480	69.53x	00:00:37.506	73.19x
OptimFrog Best	461.79 MiB	255.21 MiB	00:45:45.000	55.266%	00:14:25.828	3.17x	00:10:45.177	4.25x
OptimFrog BestNew	461.79 MiB	250.97 MiB	00:45:45.000	54.347%	00:43:07.042	1.06x	00:28:43.465	1.59x
OptimFrog BestNew-Best	461.79 MiB	250.71 MiB	00:45:45.000	54.292%	02:14:05.930	0.34x	00:28:24.315	1.61x
OptimFrog BestNew-Best-Slow	461.79 MiB	250.54 MiB	00:45:45.000	54.255%	02:14:53.020	0.34x	00:28:10.535	1.62x
OptimFrog Extra	461.79 MiB	256.47 MiB	00:45:45.000	55.538%	00:08:54.057	5.14x	00:06:33.153	6.98x
OptimFrog ExtraNew	461.79 MiB	252.80 MiB	00:45:45.000	54.743%	00:23:31.562	1.94x	00:15:32.932	2.94x
OptimFrog Fast	461.79 MiB	273.13 MiB	00:45:45.000	59.147%	00:02:59.738	15.27x	00:02:03.507	22.23x
OptimFrog High	461.79 MiB	258.72 MiB	00:45:45.000	56.027%	00:06:05.207	7.52x	00:04:26.277	10.31x
OptimFrog HighNew	461.79 MiB	253.79 MiB	00:45:45.000	54.958%	00:18:21.640	2.49x	00:12:17.469	3.72x
OptimFrog Insane	461.79 MiB	253.82 MiB	00:45:45.000	54.965%	01:08:26.497	0.67x	00:51:17.231	0.89x
OptimFrog Normal	461.79 MiB	263.39 MiB	00:45:45.000	57.038%	00:04:10.891	10.94x	00:02:57.469	15.47x
OptimFrog Ultra	461.79 MiB	254.17 MiB	00:45:45.000	55.040%	00:34:03.223	1.34x	00:25:31.458	1.79x
OptimFrog UltraNew	461.79 MiB	250.50 MiB	00:45:45.000	54.246%	01:10:56.755	0.64x	00:42:49.455	1.07x
OptimFrog UltraNew-Best-Slow	461.79 MiB	250.14 MiB	00:45:45.000	54.168%	03:41:40.514	0.21x	00:41:39.870	1.10x
OptimFrog UltraNew-Best-Slow-1x	461.79 MiB	249.91 MiB	00:45:45.000	54.118%	08:07:00.200	0.09x	01:11:59.492	0.64x
Real Lossless Default	461.79 MiB	272.87 MiB	00:45:45.000	59.090%	00:09:21.606	4.89x	00:01:04.155	42.79x
Rkau L1	461.79 MiB	268.76 MiB	00:45:45.000	58.201%	00:03:33.193	12.88x	00:02:35.947	17.60x
Rkau L2	461.79 MiB	266.66 MiB	00:45:45.000	57.745%	00:06:43.685	6.80x	00:02:59.635	15.28x
Rkau L3	461.79 MiB	266.71 MiB	00:45:45.000	57.755%	00:15:28.772	2.96x	00:03:19.375	13.77x
SBC -m3 -b63	461.79 MiB	266.61 MiB	00:45:45.000	57.734%	00:06:52.205	6.66x	00:05:51.400	7.81x
Shorten Default	461.79 MiB	305.88 MiB	00:45:45.000	66.238%	00:00:37.506	73.19x	00:00:20.727	132.44x
SonArc Default	461.79 MiB	292.87 MiB	00:45:45.000	63.422%	00:03:33.928	12.83x	00:00:42.231	65.00x
SonArc -x -o0	461.79 MiB	284.60 MiB	00:45:45.000	61.630%	04:27:38.408	0.17x	00:00:48.839	56.20x
Squeez 2.0Max	461.79 MiB	277.05 MiB	00:45:45.000	59.996%	00:03:03.583	14.95x	00:00:42.441	64.68x
TTA High	461.79 MiB	274.99 MiB	00:45:45.000	59.549%	00:01:06.267	41.42x	00:01:14.160	37.01x
TTA - Spd Opt. High	461.79 MiB	274.99 MiB	00:45:45.000	59.549%	00:00:54.717	50.17x	00:01:01.305	44.78x
WavArc -c1	461.79 MiB	305.14 MiB	00:45:45.000	66.078%	00:00:45.929	59.77x	00:00:37.883	72.46x
WavArc -c2	461.79 MiB	299.59 MiB	00:45:45.000	64.876%	00:01:18.807	34.83x	00:00:39.532	69.44x
WavArc -c3	461.79 MiB	294.15 MiB	00:45:45.000	63.699%	00:01:25.996	31.92x	00:00:40.890	67.13x
WavArc -c4	461.79 MiB	293.38 MiB	00:45:45.000	63.531%	00:01:46.492	25.78x	00:00:42.895	63.99x
WavArc -c5	461.79 MiB	277.81 MiB	00:45:45.000	60.161%	00:19:33.520	2.34x	00:00:58.998	46.53x
WavePack Default	461.79 MiB	283.21 MiB	00:45:45.000	61.330%	00:01:08.876	39.85x	00:00:45.752	60.00x
WavePack -f	461.79 MiB	288.40 MiB	00:45:45.000	62.452%	00:01:00.144	45.64x	00:00:39.950	68.71x
WavePack -fx1	461.79 MiB	288.17 MiB	00:45:45.000	62.403%	00:02:24.116	19.05x	00:00:40.297	68.12x
WavePack -fx2	461.79 MiB	288.11 MiB	00:45:45.000	62.390%	00:03:26.711	13.28x	00:00:39.701	69.14x
WavePack -fx3	461.79 MiB	288.11 MiB	00:45:45.000	62.390%	00:03:33.677	12.85x	00:00:39.647	69.24x
WavePack -fx4	461.79 MiB	285.88 MiB	00:45:45.000	61.907%	00:07:52.579	5.81x	00:00:39.633	69.26x
WavePack -fx5	461.79 MiB	285.57 MiB	00:45:45.000	61.840%	00:10:17.502	4.45x	00:00:39.594	69.33x
WavePack -fx6	461.79 MiB	285.57 MiB	00:45:45.000	61.840%	00:12:20.504	3.71x	00:00:38.880	70.60x
WavePack -h	461.79 MiB	270.69 MiB	00:45:45.000	58.617%	00:02:43.180	16.82x	00:01:10.434	38.97x
WavePack -hx1	461.79 MiB	270.53 MiB	00:45:45.000	58.584%	00:08:58.233	5.10x	00:01:10.100	39.16x
WavePack -hx2	461.79 MiB	270.36 MiB	00:45:45.000	58.547%	00:15:40.377	2.92x	00:01:09.681	39.39x
WavePack -hx3	461.79 MiB	267.92 MiB	00:45:45.000	58.017%	01:11:20.344	0.64x	00:01:09.201	39.67x
WavePack -hx4	461.79 MiB	267.72 MiB	00:45:45.000	57.975%	02:08:55.569	0.35x	00:01:09.616	39.43x
WavePack -hx5	461.79 MiB	267.48 MiB	00:45:45.000	57.922%	02:52:55.244	0.26x	00:01:08.955	39.81x
WavePack -hx6	461.79 MiB	267.01 MiB	00:45:45.000	57.820%	06:28:24.287	0.12x	00:01:08.839	39.88x
WavePack -x1	461.79 MiB	282.99 MiB	00:45:45.000	61.282%	00:03:31.319	12.99x	00:00:45.651	60.13x
WavePack -x2	461.79 MiB	282.86 MiB	00:45:45.000	61.253%	00:05:46.221	7.93x	00:00:45.813	59.92x
WavePack -x3	461.79 MiB	282.56 MiB	00:45:45.000	61.189%	00:09:32.338	4.80x	00:00:45.648	60.13x
WavePack -x4	461.79 MiB	276.88 MiB	00:45:45.000	59.959%	00:22:48.678	2.01x	00:00:45.136	60.82x
WavePack -x5	461.79 MiB	276.41 MiB	00:45:45.000	59.856%	00:34:39.448	1.32x	00:00:45.471	60.37x
WavePack -x6	461.79 MiB	275.50 MiB	00:45:45.000	59.660%	01:12:52.123	0.63x	00:00:45.456	60.39x
WavPack - MMX+SBR Default	461.79 MiB	283.21 MiB	00:45:45.000	61.330%	00:01:05.673	41.80x	00:00:45.758	59.99x
WavPack - MMX+SBR -f	461.79 MiB	288.40 MiB	00:45:45.000	62.452%	00:00:55.944	49.07x	00:00:39.361	69.74x
WavPack - MMX+SBR -fx1	461.79 MiB	288.17 MiB	00:45:45.000	62.403%	00:02:11.984	20.80x	00:00:39.493	69.51x
WavPack - MMX+SBR -fx2	461.79 MiB	288.11 MiB	00:45:45.000	62.390%	00:03:06.980	14.68x	00:00:39.121	70.17x
WavPack - MMX+SBR -fx3	461.79 MiB	288.11 MiB	00:45:45.000	62.390%	00:03:13.280	14.20x	00:00:39.184	70.05x
WavPack - MMX+SBR -fx4	461.79 MiB	285.88 MiB	00:45:45.000	61.907%	00:06:48.042	6.73x	00:00:39.090	70.22x
WavPack - MMX+SBR -fx5	461.79 MiB	285.57 MiB	00:45:45.000	61.840%	00:08:47.848	5.20x	00:00:38.766	70.81x
WavPack - MMX+SBR -fx6	461.79 MiB	285.57 MiB	00:45:45.000	61.840%	00:10:34.704	4.32x	00:00:38.800	70.75x
WavPack - MMX+SBR -h	461.79 MiB	270.69 MiB	00:45:45.000	58.617%	00:02:52.081	15.95x	00:01:10.933	38.70x
WavPack - MMX+SBR -hx1	461.79 MiB	270.53 MiB	00:45:45.000	58.584%	00:07:47.872	5.87x	00:01:08.183	40.26x
WavPack - MMX+SBR -hx2	461.79 MiB	270.36 MiB	00:45:45.000	58.547%	00:13:56.359	3.28x	00:01:10.537	38.92x
WavPack - MMX+SBR -hx3	461.79 MiB	267.92 MiB	00:45:45.000	58.017%	00:56:17.023	0.81x	00:01:08.626	40.00x
WavPack - MMX+SBR -hx4	461.79 MiB	267.72 MiB	00:45:45.000	57.975%	01:38:35.383	0.46x	00:01:06.560	41.24x
WavPack - MMX+SBR -hx5	461.79 MiB	267.48 MiB	00:45:45.000	57.922%	02:18:50.132	0.33x	00:01:09.212	39.66x
WavPack - MMX+SBR -hx6	461.79 MiB	267.01 MiB	00:45:45.000	57.820%	05:10:18.670	0.15x	00:01:08.483	40.08x
WavPack - MMX+SBR -x1	461.79 MiB	282.99 MiB	00:45:45.000	61.282%	00:03:10.348	14.42x	00:00:45.593	60.21x
WavPack - MMX+SBR -x2	461.79 MiB	282.86 MiB	00:45:45.000	61.253%	00:05:11.543	8.81x	00:00:45.536	60.28x
WavPack - MMX+SBR -x3	461.79 MiB	282.56 MiB	00:45:45.000	61.189%	00:08:28.387	5.40x	00:00:45.734	60.02x
WavPack - MMX+SBR -x4	461.79 MiB	276.88 MiB	00:45:45.000	59.959%	00:19:25.486	2.36x	00:00:45.192	60.74x
WavPack - MMX+SBR -x5	461.79 MiB	276.41 MiB	00:45:45.000	59.856%	00:29:24.299	1.56x	00:00:45.507	60.32x
WavPack - MMX+SBR -x6	461.79 MiB	275.50 MiB	00:45:45.000	59.660%	01:00:55.413	0.75x	00:00:45.268	60.64x
WinRk ROLZ3 Best Asymmetric	461.79 MiB	257.12 MiB	00:45:45.000	55.680%	00:41:39.096	1.10x	00:38:05.903	1.20x
WinRk ROLZ3 Fastest	461.79 MiB	261.96 MiB	00:45:45.000	56.727%	00:14:41.395	3.11x	00:13:40.201	3.35x
WinRk ROLZ3 High	461.79 MiB	257.60 MiB	00:45:45.000	55.782%	00:28:22.584	1.61x	00:25:08.144	1.82x
WinRk ROLZ3 Normal	461.79 MiB	258.52 MiB	00:45:45.000	55.982%	00:19:36.510	2.33x	00:18:34.329	2.46x
WMA Default	461.79 MiB	271.83 MiB	00:45:45.000	58.864%	00:03:11.479	14.34x	00:02:42.856	16.86x
Yalac Extra	461.79 MiB	260.17 MiB	00:45:45.000	56.340%	00:05:14.944	8.72x	00:00:37.835	72.55x
Yalac Fast	461.79 MiB	270.25 MiB	00:45:45.000	58.522%	00:00:39.162	70.09x	00:00:23.956	114.58x
Yalac High	461.79 MiB	260.93 MiB	00:45:45.000	56.505%	00:03:17.504	13.90x	00:00:37.701	72.81x
Yalac Insane	461.79 MiB	259.71 MiB	00:45:45.000	56.239%	00:11:33.831	3.96x	00:00:37.832	72.56x
Yalac Normal	461.79 MiB	266.95 MiB	00:45:45.000	57.808%	00:01:26.778	31.63x	00:00:28.845	95.16x
Yalac Turbo	461.79 MiB	275.58 MiB	00:45:45.000	59.676%	00:00:25.250	108.71x	00:00:21.736	126.29x

Download this table in CSV format.

Last Updated: 30th June 2006

The Goal

The primary objective is to compare a large variety of lossless audio codecs.

The comparison includes alternate versions, obsolete codecs, and general purpose compressors with audio specific optimisations. The comparison does not currently include older versions of codecs, but this may change in the future.

NB: Some timings may not be completely accurate, but these will be replaced over time.

PC Specs

Processor	CPU Intel Celeron (Tualatin) 1.2GHz @ 1.56GHz
RAM	640MB System RAM
Hard Drive	Two hard drives are used, one for reading and one for writing, to double I/O bandwidth

NB: Celeron Tualatin are basically enhanced PIII. I usually repeat tests on a PIV 2.8GHz-HT, and a 2600+ Sempron. The hierarchy of codec speed performances will obviously vary on different systems. I'm currently considering a method to highlight this phenomenon.

Test Corpus

The test corpus consists of the same sample set I use to discover possible weaknesses with codecs. The sample set is therefore geared toward testing these weaknesses, while also representing a well balanced corpus to correctly evaluate a compressor's performance.

Following careful evaluation I have managed to limit my samples to only nine files, totaling forty six minutes. However, I am currently considering a change, extracting a small portion (fifteen seconds) which is still able to show the same behaviour of the full sample. This would reduce the size of the sample corpus to no more then three or four minutes.

The main weakness of the test corpus is not being able to recognise worsening compression effectiveness with higher, or lower, than average loudness samples. This is very evident when testing one particular codec. Also, higher loudness samples are not well represented; however I intend to resolve this by introducing some further samples.

Top

---