Only to say that I use the several Delphi Area WaveAudio Package into my npWave plugin for NeoBook. From the npWave website, some extracted text:
With this plugin you can treat with WAVE files from your publications. For example, you can play and record WAVE files in an easy way, taking all controll of the proccess, and get notifying for all player and recorder events.
For more information visit the npWave website at: www.neoplugins.com