Just a suggestion from a humble newbie to NAudio. It might be worth creating a wiki style API Programmers Guide.
The tutorials are great for getting started. But in some cases I just copied code from a sample not knowing what the values really mean to performance, memory usage, etc.
And if it is a wiki style, discussion members could contribute to it and correct it overtime.
Most importantly it would free up more of Mark's time to do coding rather than answering the same newbie questions for the millionth time. :-)
Just my 2 cents.