| Ratio de compresion | Audio in real time(internet) | Software | Time for Encoding | Quality (for me) | |
| AAC 128 | 1/12 -1/25 | No | Little | Very Slow | Cd quality |
| VQF 96 | 1/14,692 | Yes(16khz) for 28.8K modem | Normal | Slow | Near CD |
| MP3 128 | 1/11 | No | Much | Fast | Near CD |
| PAC 128 | No | one software | Very FAST | Cd Quality |
Files encoded with PII 300 Mhz
File 1 - 37.639 KB - 44khz Stereo - 3:38 - Dance
| File 1 | Time | Size | Ratio | Kbits / s |
| AAC 128 | 00:46:12 | 2.639 KB | 14,26 | 96,8 kbit /s |
| VQF 96 | 00:10:58 | 2.561 KB | 14,69 | 94 kbit /s |
| MP3 128 | 00:04:29 | 3.406 KB | 11,05 | 124,9 kbit /s |
| PAC128 | 00:01:35 | 3.816 KB | 9,8 | kbit /s |
File 2 - 30.251 KB - 44khz Stereo - 2:55 - Classic
| File 2 | Time | Size | Ratio | Kbits / s |
| AAC 128 | 00:01:50 | 1.184 KB | 25,54 | 54,1 kbit /s |
| VQF 96 | 00:16:02 | 2.059 KB | 14,69 | 94 kbit /s |
| MP3 128 | 00:03:40 | 2.014 KB | 15,00 | 92 kbit /s |
| PAC128 | 00:01:20 | 2.992KB | 10,11 | 136,7 kbit /s |
File 3 - 42.521 KB - 44khz Stereo - 4:06 - Pop
| File 3 | Time | Size | Ratio | Kbits / s |
| AAC 128 | 00:58:04 | 3.127 KB | 13,59 | 101,1 kbit /s |
| VQF 96 | 00:10:24 | 2.894 KB | 14,69 | 94 kbit /s |
| MP3 128 | 00:05:59 | 3.848 KB | 11,05 | 125 kbit /s |
| PAC128 | 00:01:58 | 4.136KB | 10,28 | 134,5 kbit /s |
File 4 - 3.756 KB - 44khz Stereo - 00:21 - Human Voice
| File 4 | Time | Size | Ratio | Kbits / s |
| AAC 128 | 00:02:40 | 231 KB | 15,95 | 88 kbit /s |
| VQF 96 | 00:01:29 | 256 KB | 14,69 | 94 kbit /s |
| MP3 128 | 00:00:42 | 256 KB | 14,69 | 94 kbit /s |
| PAC128 | 00:00:10 | 346 KB | 10,85 | 131,8 kbit /s |
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