Rare Vintage Indian Drone Synth / Drum Machine

via this auction
"So here is a bizarre machine that I bought that makes drones. Called the "Sruthi Manasa - Thala". I've never seen one before and probably won't ever again.

It has 3 tones / oscillators that you can tune and switch that makes all the pitches the same, Auto and non-auto, and then maybe minor and major? says "ma and pa" and I am not sure, but it has something to do with the indian scale. Also a main knob that keeps the master pitch. it is in a specific rhythm that you can speed up / slow down, and you can also vary the "pluck" or attack of the tones. It also has a funny drum machine / rhythm that are just beeps and you can set the tempo for that too, but I don't think they ever sync up."