Hi Andy. Conversion will only work at maximum performance if your system meets or exceeds the performance rating of sound taxi. This is a calculation of available necessary resources such as CPU usage, hard disk speed etc. A rating of efficiency is calculated to be a percentage, so see at what percentage of efficiency sound taxi is working to. Hope this helps. ----- Original Message ----- From: ANDY COLLINS To: Access-UK Sent: Tuesday, January 13, 2009 11:44 AM Subject: [access-uk] Sound Taxi conversion speed Hi all - I've just bought the pro version of this programme, where it says it converts at 50 times the playback rate, this means to me, that a 7 hour Audible file should take less than 10 minutes to convert to MP3. I've got the conversion bitg rate set to 64 KBPS; so far, it has taken 45 minutes to convert 4 percent of the Audible file! Obviously, this isn't what I was hoping for, does anybody know why this conversion is so slow? This is on my Vista laptop. Thanks - Andy