Powerglide Transmissions: 2 speed Sound on Sound tape loop

Akai GX370D 1, 4 reeltoreel tape recorder with tape loop. There is a Philips EL3752, 00 stereo microphone plugged into the microphone inputs of the tape recorder. The tape recorder stereo outputs are plugged into two channels of a Fostex mixing console and are being played back through the one of the studio s monitoring systems (Not the small speakers seen in the video). The Philips microphone is set up in front of the built in 6 x9 speaker of a Wurlitzer model 145 electric piano. There is a Korg Monotron Duo plugged into the record player input of the Wurlitzer electric piano. The Korg Monotron is going through a Boss TE2 Tera Echo