It very likely is because of the encoding on the audio file. Voice
platforms are notoriously picky about the audio formats they require.
This is platform-dependent, but generally speaking mu-law, 8 KHz, 64 kbs,
mono .vox or .au files seem to work. But again, check the documentation
for the voice platform you're using.
In <firstname.lastname@example.org> Sergej wrote:
> Hi there!
> I uploaded few audio wav files into project. When i am calling
> application through SIP wav files are played in slow slow motion. Is
> there a problem because they are in 256 Kbps bit rate?