Whether or not you consider recordings of pianola rolls played with
care on a well-functioning instrument [as 'mechanical'] is a moot
point.   Personally, I would argue that, although mechanically produced
to a greater or lesser extent, music can never be "mechanical".

Be that as it may, I just want to draw the group's attention to a new
CD which will be available shortly.   Michel Chaigne of Exeter has
entrusted me to play some rolls from his amazing collection in order
to make them available to a wider audience.   Most of the music is
early jazz and "boogie woogie" by Clarence Johnson and James Blythe
-- two legendary artists.   I hope to have a review copy available
soon, and hope those people looking for something new in the way of
"recordings of mechanical music" may find something of interest here.

Paul Morris
Exeter, UK
http://www.paulmorrismusic.co.uk/