An Atari Punk console with dual NE555P chips.
https://sdiy.info/wiki/Atari_Punk_Console
To address the problem described in "Problems" above, where "With a pot turned down to minimum, because internally the 555 shorts pin 7 to ground during parts of the oscillation, there will be a short circuit across the battery.", a 330-ohm resistor is connected in series with each pot.
It certainly affects the oscillator's frequency, but the effect on the audible range seems minor when experimented with it.
MIT License
Originally designed by Forrest Mims, and then named by Kaustic Machines in the 1980s.