MIDI Microphone?????

[dave solursh]

Hello from canada,  I just finished my first real DIY project, a theramin
from Paia.  I painted it green because it reflects my experience with the
workings inside the black boxes I have been using for years.  I have had
great luck and it is working just fine, but it is time to take this
theramin to the next level.  I would like to use it as a MIDI controler and
have not been able to find any designs for a CV to MIDI converter.  I know
there are a lot of aspects to consider going from CV to MIDI but I am
looking for something pretty crude for the moment.  I have heard through
the grape vine that something exists called a MIDI MICROPHONE that converts
CV to MIDI and that may do just fine.   I can't seem to find any literature
on this MIDI Mic and was wondering if any of you could lead me in the right
direction, or help me design something that could convert a Theramin CV to
a MIDI note on and off message on seperate notes over at least on octave.

        I have one idea, and maby someone could help me start my quest.  is
there an electrical circuit that would be turned on (conduct electricity)
when a certain frequency was introduced into it.  I figure if you have 128
of these (tuned to approx. each note) each triggering an eight bit MIDI
note # and velocity # It could be a CV to MIDI.   Please remember I am
GREEN to this,   Little Dave.