This is a One to One In/Out Midi Driver. Use it to input (into Cakewalk for example) without an external keyboard ! Or use Cakewalk without Midi Hardware ( to use staff view on a laptop for example) Example : - Connect CakeWalk Midi In to Midimux In 1 (using Midi setup) - Connect MidiKeyb Midi Out to MidiMux Out 1 .That's it !!! To install midimux copy midimux.drv to \WINDOWS\SYSTEM\midimux.drv , add "MIDIx = midimux.drv" in your system .ini ,[drivers] section ; where x is the next value. example : [drivers] timer=timer.drv midimapper=midimap.drv MIDI=sbpfm.drv Wave=sbpsnd.drv MIDI1=sbpsnd.drv MIDI2=midimux.drv Comments Welcomed ,CIS :Thierry TABARD 100064,2213