Two apologies.The first is that I keep starting new threads, but as I do not receive my mails and keep replying to myself - it's just not possible. Daniel has already looked at your end, and I at mine :(
Second apology - please disregard the Xing header problem listed in my last post.
There was a typo in my samplerate lookup table (const array) - sorry for the mistake.
The Xing headers are valid. Mildly embarassed, BC
