I downloaded and used the WaveFile class and I had a question about the Position property. I want to start x seconds into the playback of the .wav file but I can't figure out the conversion between Position units and seconds. Is there a formula I can use? More easily said, how many Position units equal 1 second???

Thanks so much in advance. This class has been really really helpful!

The number of Position units that equals a second depends from WAVE file to WAVE file. It depends on the sample rate, the size of the samples and the number of channels.
I've uploaded a new version of the WaveFile class that has two methods that can do the conversion. The methods are called ToByteOffset and ToMilliSeconds. You can download the new version of the class from http://www.mentalis.org/soft/class.qpx?id=14