Best audio format quality for GVP

Architect & Flows
1

Hi guys,
I am lost when we talk about audio sampling and that stuff.
A KB states:

-audio/x-mulaw-6khz
-audio/basic (Raw headerless) 8kHz 8-bit mono mu-law [PCM] (G.711)
-audio/x-mulaw-6khz-wav
-audio/wav 8kHz mu-law
-audio/x-wav (RIFF header) 8kHz 8-bit mono mu-law [PCM] (G.711)
-audio/x-mulaw-8khz-wav
-audio/x-alaw-6khz
-audio/x-alaw-8khz
-audio/x-alaw-basic (Raw headerless) 8kHz 8-bit mono A-law PCM
-audio/x-alaw-6khz-wav
-audio/x-wav (RIFF header) 8kHz 8-bit mono A-law [PCM] (G.711

But all of them are 8kHz or less. I guess a more Hz would be better.

The user guide by other hand shows RAW formats like g722 with a sample rate of 16000Hz supported. Has any one tried or has a recomendation on best options?

My user complains about a noise in the background when using WAV with 8kHZ ulaw…so searching for better options.

Thanks

2

Hey cav,

8000Hz 32-bit float uLaw/aLaw can work perfectly well if you have the right audio editing tools. Maybe throw one over to me on email and I’ll see if I can clean it up for you?

3

Hi,

With Genesys MCP / Media Server, we used sox to convert audio file. We tried a lot of format and tools and after using this tool with the following command line, we never received complains and sounds was pretty clear;



# single conversion
sox.exe [Path]\[File].wav -e mu-law -r 8000 -c 1 -b 8 [Output_Path]\[Output_File].wav

# if you have multiple files to convert
for %i in (*.wav) do D:\batch\sox-14.4.1\sox.exe %i -e mu-law -r 8000 -c 1 -b 8 out\%i

It is basically pcmu 8 khz with some tweaking.
Hope this helps.

4

Thanks guys, will give a try. I use AudaCity or GoldWave usually
Adam, will ask for the original WAV file as I guess editing a compressed file already won’t help much :smiley:
Thanks!