153a5a1b3Sopenharmony_ciThese wav files show how Sonic performs at increasing speech rates.  All sound
253a5a1b3Sopenharmony_cisampels are in the public domain.
353a5a1b3Sopenharmony_ci
453a5a1b3Sopenharmony_cisonic.wav
553a5a1b3Sopenharmony_ciThis is a sonic 2X sped-up version of a public domain librivox.org recording, from
653a5a1b3Sopenharmony_cithe audiobook "Princess of Mars".
753a5a1b3Sopenharmony_ci
853a5a1b3Sopenharmony_cisoundtouch.wav
953a5a1b3Sopenharmony_ciThis is the same recording as sonic.wav, but sped up using soundtouch, which
1053a5a1b3Sopenharmony_ciuses WSOLA rather than the sonic algorithm.  Even at 2X speed up, you should be
1153a5a1b3Sopenharmony_ciable to hear the characteristic WSOLA distortion relative to the sonic version.
1253a5a1b3Sopenharmony_ci
1353a5a1b3Sopenharmony_citalking.wav
1453a5a1b3Sopenharmony_ciThis is my father talking, using a decent microphone and 44KHz sample rate.
1553a5a1b3Sopenharmony_ci
1653a5a1b3Sopenharmony_citalking_2x.wav
1753a5a1b3Sopenharmony_ciThis is his voice sped up by 2X using Sonic.
1853a5a1b3Sopenharmony_ci
1953a5a1b3Sopenharmony_ciespeak_s450.wav
2053a5a1b3Sopenharmony_ciSonic also performs well at increasing the speed of synthesized speech.
2153a5a1b3Sopenharmony_ciespeak_s450.wav was generated using 'espeak -s450 -f test1.txt -w
2253a5a1b3Sopenharmony_ciespeak_s450.wav'.  This is the highest speed currently supported by espeak,
2353a5a1b3Sopenharmony_cithough Sonic can speed up espeak to much faster rates.
2453a5a1b3Sopenharmony_ci
2553a5a1b3Sopenharmony_ciespeak_sonic.wav
2653a5a1b3Sopenharmony_ciThis was generated with 'espeak -f test1.txt -w out.wav;
2753a5a1b3Sopenharmony_cisonic 2.6 out.wav espeak_sonic.wav'.  Sonic sped it up 2.6X, which is about the
2853a5a1b3Sopenharmony_cisame speed as espeak at -s450.  I personally feel that the sonic sped up sample
2953a5a1b3Sopenharmony_cisounds better than espeak at -s450.
3053a5a1b3Sopenharmony_ci
3153a5a1b3Sopenharmony_citwosineperiods.wav
3253a5a1b3Sopenharmony_ciThis is just two sine periods, which is too short to hear.  However, it's
3353a5a1b3Sopenharmony_ciuseful for making sure the flush function works correctly.  A 2-X speedup should
3453a5a1b3Sopenharmony_ciresult in one sine period with no distortion.
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