thank you for that,
but unfortunately the backs of your templates show through, you should avoid that.
simply place a piece of paper or cardboard that is as black as possible on the template when scanning..........
then carry out automatic level adjustment and convert the image to grayscale...
that should only be a passive RC filter,
to test you can bridge the input and output 1-3.
1 input
2 GND
3 output
please check before,
without warranty ;)
every ES5510/ESPR6 ensoniq chip has its own working voltage,
this is set with VR 1.
this voltage is always printed on the chip.
if this is unknown, you take the risk of destruction.
but this does not apply to the OTISR2 chip.....