Mirage DSK-1 Manual page 40

instruments, all the important performance instructions - key down, key up, velocity, pitch bend,
Mod wheel, sequencer control functions, etc. - are sent and understood by all MIDI instruments,
regardless of the manufacturer.
In addition to notes played and sync information, the Mirage will also send and receive Program
Changes (which can be used to remotely instruct the Mirage to load a sound from disk, or to
change Upper and/or Lower programs). The Mirage can be set to respond to Pressure (After
Touch) or a Breath Controller when played from an instrument that has them. There is also a
LOCAL ON/OFF control (param. 30) which allows you to turn off the Mirage's internal voices
and only send what you play out MIDI, It's a good idea to familiarize yourself with the
descriptions in the PARAMETER APPENDIX in order to take full advantage of these
capabilities.
For more information about the MIDI standard, contact the International MIDI Association,
11857 Hartsook St., North Hollywood, CA 91607.
Since the Mirage is essentially a computer, how it functions (including its MIDI implementation)
depends entirely on the operating system (O.S.) that is loaded into its memory from diskette each
time you turn it on. The standard Operating System (which is the one found on the three sound
disks that came with your Mirage) is optimized for performance - sequencing, receiving program
changes and After Touch, etc. There is another operating system, called MASOS (Mirage
Advanced Sampling Operating System), which gives up these features in order to implement
others, such as the ability to send sound data via MIDI to computers, and to perform complex
data manipulations such as scaling, reversing, and adding sounds together digitally. MASOS is
included with the Advanced Sampler's Guide, and its MIDI implementation is covered there.