MFOS has a very interesting and somewhat complicated guitar synth project available –
The SUB-COMMANDER is a great project for the advanced electronics hobbyist/guitar player. I think there are quite a few of us out there. Obviously you can buy this functionality in a “Digi-Tech” stomp box with no soldering, troubleshooting, or swearing involved but heck… what fun is that? By the time you complete this project you will have built:
– A guitar sub-octave generator
– A guitar to gate & trigger generator
– An audio mixer.
– Two AD/AR generators.
– Two Triangle wave LFOs.
– A 12dB/octave lowpass VCF (Voltage Controlled Filter)
– A exponential response VCA (Voltage Controlled Amplifier)
Awesome effects with ‘made-it-myself’ pride – could be a good way to familiarize yourself with the synth basics as well – Link