Spotted this on the Musical Traditions site:

"Most people with a serious interest in traditional American fiddle music will be familiar with Rounder's North American Traditions series, established in 1999 and largely devoted to releasing recent field recordings made by dedicated collector Mark Wilson during the 1980s and '90s.
...

"Unfortunately, with the decline of the CD and the growing commercialisation of the Rounder enterprise, most of these recordings are either no longer in print or are only available as downloads in the inferior MP3 format and without the accompanying documentation which was always a crucial feature of the NAT series, reflecting their core belief that 'traditional music is best appreciated if it is understood in terms of the people and societies that have produced it'.

"To remedy this situation Musical Traditions has begun re-releasing the [North American Traditions] series on CD under its own label and with the original booklets. "

~ Becky in Long Beach