Re: [Harp-L] TurboSlide Circular?

[fjm <bad_hat@xxxxxxxx>]

Try here,

http://www.bluesharmonica.de/english/spiraltuning/spiraltuning.html

for a good explanation of circular (spiral) tuning.  Another resource is 
www.patmissin.com

For a product listing, youtube video and explanation of the Turbo Slide 
harmonica go here,

http://www.turboharp.com/Products.asp?pid=59&tid=&did=&sid=

Daniel Perrone's youtube video demonstrating the use of a Turbo Slide 
harmonica is here,

http://www.youtube.com/watch?v=PFHzbySeIGk

Finally to answer your question about what a Turbo Slide circular is, a 
Turbo Slide harmonica that employs some version of circular tuning, see 
above.  fjm