Audio By Vocalize Fred Obachi Machoka, the celebrated voice behind Kenya’s enduring love for rhumba. [Courtesy] Prof Egara Kabaji is right that Fred Obachi Machoka’s voice has bewitched Kenya, and possibly beyond. Over the years since his days at the national broadcaster VOK, now KBC, many of us, across all ages, fell in love with rhumba. There was a time when the music was tied to class; if you drove a Mercedes-Benz or a Land Cruiser – not even owned, just drove – you loved rhumba. But our retired general made it a treasured fireside commodity for everyone. Where I…