The Equal Interval System | Lyle "Spud" Murphy's Equal Interval System
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Join the best musicians and composers in praise of the Equal Interval System Course.


Murphy’s prestigious Equal Interval System (EIS) moves beyond traditional theory with a fresh and innovative way to composing music that will unleash your creativity.


What We Do

This course includes: Harmony, Melodic Development, Composition, Arranging and Orchestration.

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Who We Are

Lyle 'Spud' Murphy enjoyed 75 years of success in many areas of the music industry.

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Herbie Hancock and Benny Green are among the many talented musicians who praise the EIS method.

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