9-9-09, via iloveanalogue, is a short ‘oral history’ of drum machines, celebrating 25 years of the Roland TR-909.

Narrated by Robbie Ryan, the video traverses the history of the programmable drum machine from the CR78, TR808, TB303, TR909, and LinnDrum, with audio examples of each.

But what really makes this oral history unique are Ryan’s vocal approximations of each of the devices and the music that they were used on. “Tchk-a-tchk-a tcha, tchk-a-tchk-a thcha….”