Enable 16kHz audio playback with provided better upsample algorithm

[GoogleCodeExporter]

The current version of as3wavsound doesn't support playback 16 kHz audio, which 
is really required in many cases, especially for speech recognition.

Even we manually remove the limitation for 16kHz in the audio setting, the 
quality of the current upsample impl in Wav.as is not acceptable (the noise).

So in our case, we implemented an upsample replacement:
https://github.com/englishtown/as3wavsound/blob/feature/upsample/src/org/as3wavs
ound/sazameki/format/wav/Wav.as#L81

Out impl is copied from the following stackoverflow ticket:
http://stackoverflow.com/questions/7995470/how-can-i-resample-wav-file

I suggest you guys could consider use this algorithm to replace your current 
one.

Original issue reported on code.google.com by [email protected] on 14 Jan 2014 at 6:08

[GoogleCodeExporter]

Wired, it doesn't support modification after submission? This should be an 
enhancement, not a defect.

Original comment by [email protected] on 14 Jan 2014 at 6:11