@cheeseweasel 561569 wrote:

Nice! Might even have a stab at that myself.

if you do, I’d suggest resisting any temptation to substitute the 741 for more modern, cheaper alternatives.

It is surprisingly expensive in a DIL-8 package, it seems to cost the same as it did in 1986 in spite of all other similar components (even from the same TI plant in Malaysia) being heavily reduced in price.

Even then in 1986 it was thought of as “noisy” for audio circuits but as it is the circuit is deliberately generating two rough square or triangle waves and modulating them at what may be beyond distortion level, all this noise would be part of the sound – just like the 303 (which made use of transistors that the Japanese had over the years rejected for hi fi audio use and even cheaper transistor radios because of the distortion and feedback they made)