Synth Schematics

It’s surprisingly simple to build your own analog synthesizer. Schematics have been around for decades, and many are online. Finding them can be a harder task, so I’ve compiled a list of interesting circuits a while ago.

Oscillators

• The simplest possible osscilator
• Simple VCO
• Another simple VCO
• CEM3340 VCO
• Another CEM3340 VCO
• A more fancy CEM3340 VCO
• XR2206 VCO

LFOs

• Simple LFO
• LFO around electric druid’s VCLFO10
• 555 LFO

VCAs

• AS3360 VCA
• Basic VCA
• Another basic VCA

Filters

• The simplest LPF and HPF
• Vactrol filter
• State variable VCF
• LPF
• BPF

Mixers

• Four channel mixer based on AS3360
• TL072 mixer

Envelopes

• AR envelope
• ADSR based on electric druid’s envgen8C
• 555 ADSR

FX

• pt2399 Delay
• Another pt2399 Delay
• Bitcrusher
• Simple Fuzz
• Vactrol Phaser
• Chorus

Other

• Atari Punk Console
• Arduino Sequencer
• Envelope Follower
• Buffered Mult
• Attenuverter
• Slew Limiter
• 8 bit ADC

Collections

• Dintree
• Tone