This is something I’ve been working on for a while, a very versatile tremolo guitar effect. Electrically it’s not very complicated, most work is done with a PIC16F886 microcontroller which generates a PWM signal which is then filtered and used as an analog control voltage for a VCA (voltage-controlled amplifier).
The video shows an older version. Recently I started to rewrite the software because the old software was too unreliable (tap tempo problems, rotary encoders issues, noise).
Some features so far:
- Sine, triangle, ramp-up, ramp-down, square, pattern modulation;
- Tap-tempo with subdivisions (including triplets)
- Very low and very high speeds for weird effects
- Three user-programmable patterns (a la BOSS Slicer)
- Duty-cycle control for square wave modulation
- Fade-in with tap-tempo switch (in ‘special mode’)
Future add-ons:
- Stereo input/output for panning options
- Additional ‘special mode’ features such as compressor, expander, random on/off…
Hyves
Last.fm
Myspace
Twitter
YouTube