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New Member

IVR Prompts Recording- noise after converting to Cisco format

Hi,

We got some IVR rompts recorded by a professional vendor who recorded the prompt in the following format:

bit rate=705kbps

Audio Samle Size=16bit

Channels=1(mono)

Audio Samle Rate=44kHz

Audio format=PCM

Since this format is not supported by cisco, I had to convert it to cisco format using Windows XP Sound Recorder.then the format is the following after conversion:

bit rate=64kbps

Audio Samle Size=8bit

Channels=1(mono)

Audio Samle Rate=8kHz

Audio format=CCITT u-law

But after conversion I noticed the change in clarity, and can hear a hissing noise while playing this prompts.

Q 1)Can I get rid of the disturbance/hissing noise by using some other player/convertor using some other utility for conversion?

Q 2)What if I ask the vendor to record again dirctly in 8kHz, 8bit mono..Will this make any difference in clarity , since ultimately the result is 8 kHZ 8 bit mono?

I want to get avoid getting back to the vendor...

Pls advise..

8 REPLIES

Re: IVR Prompts Recording- noise after converting to Cisco forma

Do not use Windows prompt recorder to convert it. Use something like sound forge, audacity, or goldwave.

david

New Member

Re: IVR Prompts Recording- noise after converting to Cisco forma

Sorry, now trying audacity,, can you tell me which options to use for conversion?

Re: IVR Prompts Recording- noise after converting to Cisco forma

CCITT u-Law, 8kHz, 8-bit, Mono 7 kb/sec.

david

New Member

Re: IVR Prompts Recording- noise after converting to Cisco forma

You should also be able to use the MOH audio translator service on callmanager (UCM). This will transcode and format the audio file into a compatible format. There is additional information in the srnd.

robb

New Member

Re: IVR Prompts Recording- noise after converting to Cisco forma

Hi,

Will the sound quality be better if the prompts are recorded directly in :

bit rate=64kbps

Audio Samle Size=8bit

Channels=1(mono)

Audio Samle Rate=8kHz

Audio format=CCITT u-law

than converting from the following:

bit rate=705kbps

Audio Samle Size=16bit

Channels=1(mono)

Audio Samle Rate=44kHz

Audio format=PCM

or technically this makes no diffrence?

Thanks

Re: IVR Prompts Recording- noise after converting to Cisco forma

recording them directly will be the best, but honestly it might sound very similar if you just convert them.

david

Green

Re: IVR Prompts Recording- noise after converting to Cisco forma

Redigitizing always introduces noise. You may not be able to hear it over the phone though.

Regards,

Geoff

New Member

Re: IVR Prompts Recording- noise after converting to Cisco forma

Friends,

What is your experience with this kind of a problem in the past.

1)When you give order to the vendor for recording IVR prompts to be used for IPCCX, in which format do you ask the vendor to record and how is the quality after that?

2)By any change on the IPCCX server, can we increase the playing quality to a higher format(may be somewhere in the registry or something like that).

Thanks

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