I recently designed an effect pedal for the voice, mainly for reverb.
- XLR connectors
- Audio processing by the Spin FV-1 DSP
- Basic but decent mic preamp, lacks phantom power
- External 9 V power supply required (no room for battery in a 1590BB enclosure)
- A lot of FX can be realized with the help of SpinCAD Designer (http://holycityaudio.com/forum/viewforum.php?f=28) or the SpinASM, and an EEPROM programmer.
- Building is simple and not very expensive (about 60 € with good quality components)
Schematics, PCB and building instructions on the Aélis project page (http://ldesoras.free.fr/elec/aelis/aelis-eng.html). I'll put pictures when I get them.
(http://ldesoras.free.fr/elec/aelis/aelis-side-small.jpg) (http://ldesoras.free.fr/elec/aelis/aelis-side.jpg)
Below, the prototype circuit with a few patches. Enclosure illustrated by Diane Aberdam (http://dianeaberdam.tumblr.com/).
(http://ldesoras.free.fr/elec/aelis/aelis-top-small.jpg) (http://ldesoras.free.fr/elec/aelis/aelis-top.jpg) (http://ldesoras.free.fr/elec/aelis/aelis-inside-small.jpg) (http://ldesoras.free.fr/elec/aelis/aelis-inside.jpg)