Simple 16 bit integers would allow you to divide 10 octaves into interval
of 0.183105 cents, and a dynamic range of 130 dB into intervals 0.00198364
dB, do we really need 32 bit floats or even floats at all. Remember that
midi is designed to represent music in a abstract musical way, not actually
physical values like Hz and watts. Things like tunings should be set in the
synth not on your Midi keyboards or what every. All right dynamic tunning
is an idea I myself find interesting but 0.183 cents should handle that.

Nathan Day
nathand@senet.com.au