Well, since Mp3pro is a closed audio format & the only plugin written to decode Mp3pro was written for Winamp, I would suggest that people looking at MP3PRO look at an alternative called Plusv. Plusv is an alternative to Mp3pro & unlike Mp3pro, Plusv is freeware & comes with source code. You can download the Plusv encoder, source code & Winamp2 plugin from Plusv can be downloaded from http://www.plusv.org/download/ . The Plusv Winamp2 plugin works with the Winamp Input Plugin.