Cnoidal wave is the wave height, "λ" is the wavelength, "c" is the phase speed and "η" is the trough elevation. Further cn is one of the Jacobi elliptic functions and "K"("m") is the complete elliptic integral of the first kind; both are dependent on the elliptic parameter "m". The latter, "m", determines the shape of the cnoidal wave. For "m" equal to zero the cnoidal wave becomes a cosine function, while for values close to one the cnoidal wave gets peaked crests and (very) flat troughs. For values of "m" less than 0.95, the cnoidal function can be approximated with trigonometric
The Crests group continued as a trio of Carter, Ancrum, and Lewis and became a lounge act, disbanding in 1978. Carter went to sing with Charlie Thomas' Drifters for a year, then moved to Plainfield, New Jersey, to teach voice and set up his own recording studio. In 1973, Carter met his wife Leona, an accomplished classical pianist/composer. Leona Carter has been a part of The Crests since then. Carter reformed The Crests in 1980, auditioning over 200 singers at his studio, finally settling on lead Bill Damon (a Maestro sound-alike), Greg Sereck, Dennis Ray and New York drummer, Jon Ihle. The