The Castalia Muse

Who Was Castalia?

Welcome to the website for Castalia Communications. We have been primarily a music-education reference company for over 35 years, and this site is designed to showcase our main line of products. But we have also produced many other products, from novels to psychology textbooks to political bumperstickers, most of which are found on this site.
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Keith Allen, 1980

Who created the CAGED System for guitarists? There has been some controversy as to the origins of the “CAGED System” for mastering the guitar. In an article in the May, 1975, issue of Guitar Player Magazine (pdf) called “Blue Bear Waltzes” about San Francisco’s famous Blue Bear School of Music, the school’s 20 year old
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Keith Allen–Music Education Master

I’d like to take the opportunity to write about my late partner on The Guitar Poster, Keith Allen, who was the world’s all-time best guitar teacher and perhaps the best teacher I ever had in any subject. I consulted him on all my songs, coaxed him into playing on several in the studio, but I never took an
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