Audio Compression and Performance Question

[dbachhawat]

Our demo system currently uses 7 audio files (wav files); they're several seconds each. We're wondering if you know of any audio compression techniques or other formats that might be smaller to download. We are asking this because we are experience performance issues. When we run our system and call one phone, there are no performance issues. However, when we use the same exact VXML script and call 5 phones simultaneously, there is a large delay (up to 15 seconds) in playing one of our audio files which is about 350KB (and is stored on our server). We understand that uploading our audio files to Plum's audio repository can certainly help. Any other suggestions regarding this performance hit? Will compression help?

Thanks

[support]

Hi,

Compressing your audio files will certainly help with caller experience for IVR calls: http://support.plumvoice.com/viewtopic. ... sion#p1147

You could also look into caching audio files by using the "maxage" and "maxstale" properties:

http://www.plumvoice.com/docs/dev/devel ... ce:caching
http://www.plumvoice.com/docs/dev/voicexml:tags:audio

Regards,
Plum Support

[sevana]

Hi,

Have you considered compression optimization using AQuA? Here is a link to blog post for MP3 compression optimization, but the same can be aplied for any voice codec that has f.e. a quality parameter to adjust. The trick is that with the described routine you automatically get the bes quality with highest compression.

http://blog.sevana.fi/optimize-bitrate- ... -wideband/