My HK 525 has an onboard MP3 decoder I would like to use with my Archos 20GB MP3 Jukebox. I have a couple of questions if anyone knows: 1. The manual mentions a PCM (?) adapter for hooking an MP3 player into one of the optical digital ports. Does anyone know what this is and where I can find this? 2. Is there such a thing as a USB to optical or digital coax adapter? 3. Is it necessary to connect the Archos to a PC via USB, or is there a way (other than using a mini to RCA adapter) to connect the player directly to the 525 to use the HK MP3 decoder? I greatly appreciate any input!