| These flac files show how Sonic performs at increasing speech rates. All sound |
| sampels are in the public domain. The 'flac' lossless compression utilitiy was |
| used to reduce the size of the wave files. |
| |
| sonic.flac |
| This is a sonic 2X sped-up version of a public domain librivox.org recording, from |
| the audiobook "Princess of Mars". |
| |
| soundtouch.flac |
| This is the same recording as sonic.flac, but sped up using soundtouch, which |
| uses WSOLA rather than the sonic algorithm. Even at 2X speed up, you should be |
| able to hear the characteristic WSOLA distortion relative to the sonic version. |
| |
| talking.flac |
| This is my father talking, using a decent microphone and 44KHz sample rate. |
| |
| talking_2x.flac |
| This is his voice sped up by 2X using Sonic. |
| |
| espeak_s450.flac |
| Sonic also performs well at increasing the speed of synthesized speech. |
| espeak_s450.flac was generated using 'espeak -s450 -f test1.txt -w |
| espeak_s450.flac'. This is the highest speed currently supported by espeak, |
| though Sonic can speed up espeak to much faster rates. |
| |
| espeak_sonic.flac |
| This was generated with 'espeak -f test1.txt -w out.wav; |
| sonic 2.6 out.wav espeak_sonic.wav'. Sonic sped it up 2.6X, which is about the |
| same speed as espeak at -s450. I personally feel that the sonic sped up sample |
| sounds better than espeak at -s450. |
| |
| twosineperiods.flac |
| This is just two sine periods, which is too short to hear. However, it's |
| useful for making sure the flush function works correctly. A 2-X speedup should |
| result in one sine period with no distortion. |