I’ve got each oscillator feeding one into the next with a diode and resistor in between each. (The schematics below recommend 1Ks.) But, there doesn’t seem to be agreement out there on which way to hook up the diodes.
The last schematic here shows the cathode going towards the second oscillator:
hackaday.com
The third schematic here shows the cathode going towards the first oscillator:
fluxmonkey.com
I’ve constructed a little keyboard with multiple trimpots in the circuit of the third oscillator and am trying to figure out why my harmonically-strange higher pitched notes are so much lower in volume than lower pitched notes.
Are those diodes (and/or the 1K resistors) really necessary between the oscillators? I’m wondering if the slight voltage drop across each one is causing my voltage issue.
Thanks for any and all help!
The last schematic here shows the cathode going towards the second oscillator:

Logic Noise: Sweet, Sweet Oscillator Sounds
Welcome to part one of a series taking you down the rabbit hole of DIY electronic synthesizers based on (largely) CMOS logic chips. Instead of synths being commodity gear made by large corporate en…
The third schematic here shows the cathode going towards the first oscillator:
fluxmonkey - xprmntl snd - electronoize
fluxmonkey is a kittylitter bucket full of sonic activities involving bbob drake, including electronic and electro-acoustic performance, recordings, synthesizer design and construction, and workshops on music tech and improvisation.
I’ve constructed a little keyboard with multiple trimpots in the circuit of the third oscillator and am trying to figure out why my harmonically-strange higher pitched notes are so much lower in volume than lower pitched notes.
Are those diodes (and/or the 1K resistors) really necessary between the oscillators? I’m wondering if the slight voltage drop across each one is causing my voltage issue.
Thanks for any and all help!