The balance of power within the world of heavy rock underwent a major shift on April 7, 1975, when guitarist Ritchie Blackmore performed his final concert as a member of Deep Purple, prior to embarking on the next chapter of his career as the guiding force behind Rainbow. Not that anyone — except maybe Blackmore himself — was fully aware of any of this on that night.

The members of Deep Purple, Mk. III -- Blackmore, singer David Coverdale, organist Jon Lord, bassist Glenn Hughes and drummer Ian Paice -- were more preoccupied with maintaining their sanity at the end of yet another grueling album-tour cycle, this time in support of the previous year’s Stormbringer, which was lukewarmly received by fans.

The album had stirred the already fragile emotions of the group, as new members Hughes and Coverdale began exerting their songwriting personalities, rubbing Blackmore the wrong way with their passion for American funk and soul music, neither of which appealed to Deep Purple’s resident songwriter.

But petty musical differences were really just a catalyst behind the deeper wanderlust affecting Blackmore after nearly a decade and nine studio albums with the band. Feeling the need for, as he put it, “some fresh air,” Blackmore took advantage of a few days off during Deep Purple’s U.S. tour that fall to book some studio time in Los Angeles with singer Ronnie James Dio and his band Elf.

At first, Blackmore was planning to just record just a solo single of the song “Black Sheep of the Family” by British prog band Quatermass -- which his Purple bandmates had rejected during the Stormbringer sessions — until he found out just how easy it was to work with Dio, who co-wrote the B-Side, “Sixteenth Century Greensleeves.” All of which gave Blackmore other ideas.

So even before Deep Purple resumed their touring activities across Europe in March of 1975, Blackmore had already whisked Dio and Elf members Gary Driscoll (drummer), Craig Gruber (bassist) and Mickey Lee Soule (keyboardist) to Musicland Studios in Hamburg for the recording of Rainbow’s debut album.

Still the rest of Deep Purple failed to grasp the seriousness of their guitarist's plan of escape as their touring machine trudged across continental Europe, mired in drug abuse, ego battles and sheer exhaustion.

As the stage lights darkened and the audience dispersed from Paris’ Palais des Sports following Deep Purple’s distinctly workmanlike performance on April 7, the chapter closed on Blackmore’s historic run at the helm of the legendary band. And with it, Rainbow’s birth could formally be announced.

Fortunately, Deep Purple's third-to-last concert with Blackmore had been captured for posterity, and duly emerged as Graz '75 to give fans a belated glimpse into the Mk. III's European dates. Unfortunately, the band would face a brief, troubled afterlife following Blackmore's exit.

Deep Purple partnered with guitarist Tommy Bolin for the fan-polarizing Come Taste the Band LP, while Blackmore sped off toward nearly a decade of continued acclaim with Rainbow. In 1984, he finally agreed to join his old band for the Mk. II lineup’s triumphant reunion on Perfect Strangers. And as always, it was done entirely on Blackmore’s terms.

 

 

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