How  reduce audio bitrate

Hi,
I have to develop a component capable of reduce an audio file bitrate. It should receive a DataSource in Input and generate another DataSource (bitrate reduced) in Output.
I think to use a Processor i order to do such a work, but I don't know how.
Someone can help me with hints or suggesting any links?
Thank you all in advance,
Francesco
Message was edited by:
Paco@ITALY
null

I started developing my component using a Processor to call getControl() method of Control Interface in order to obtain the control I need (BitRateControl).
More precisely:
BitRateControl bitControl = (BitRateControl) processor.getControl("javax.media.control.BitRateControl"); I pass in Input an mp3 file to the processor using a DataSource object, but when I invoke bitControl.getBitRate() method, the result is 0.
Someone can tell me why?
Thank you all again.

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