Yesterday i tried to make a little Emax Editor...and it works fine!
It's not complete now, but my favorite parameters are inside.
With the RMG-Page of C-LAB Notator (Atari St) you can make it very fast (needs 30min).
As slow as Sysex with a Matrix 1000 etc. but it's easy to edit the "Analog area" of the Presets!
For "real" realtime it's better to control by CC with MIDI A or B for Cut-Off an Q etc.
Two exampels of the code, one i found at the yahoogroups, that was the inspiration for me to do this:
VCF-Envelope Decay (HEX-Code): F0 18 02 1A 00 57 02 29 XX F7
F0 - system exclusive
18 - E-mu id
02 - Emax id
1A - exclusive command to change voice parameter
00 - the lowest key number
57 - the highest key number (87 in decimal)
02 - affect both voices, primary and secondary
29 - Decay-Parameter Filter
XX - Value from the fader (0 to 31 in decimal)
F7 - end of sysex message
VCF-Cut Off (HEX-Code): F0 18 02 1A 00 57 02 1F XX F7
F0 - system exclusive
18 - E-mu id
02 - Emax id
1A - exclusive command to change voice parameter
00 - the lowest key number
57 - the highest key number (87 in decimal)
02 - affect both voices, primary and secondary
1F - Filter cut-off parameter
XX - Value from the fader (0 to 120 in decimal)
F7 - end of sysex message
the specs you can find here:
http://www.emulatorarchive.com/assets/PDF/Emax%20MIDI.pdf