[ecasound] moving from sox, how do I increase volume by X decibels?

I am moving a system's dependency on Sox to Ecasound and am not sure
exactly how to go about increasing volume a set amount of decibels. To
explain, we have xml templates where effects are applied to the audio
and the current sox based system requires a value in decibels.

I have tried taking the decibel number, multiplying it by 100 and giving
that as a value to '-eva'.

However, my new system produces clipped and loud audio whereas the
current legacy system is smooth and much quieter.

What is a good algorithm I can implement?

-- 
Jason Galyon
Silver Screen Tele-Reality, Inc. 
http://www.sister.tv | http://www.videocarlot.tv
Phone: 972-855-3500 |  Fax: 413-778-2146
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