User Manual

Appendix
39 Rocket User´s Manual
tion destination is sound-shaping component such as a
filter or a VCA.
Note on / Note off
This is the most important MIDI message. It sets the pitch
and velocity of every generated note. The time of arrival
is simultaneously the start time of the note. Its pitch is
derived from the note number, which lies between 0 and
127. The velocity lies between 1 and 127. A value of 0
for velocity is similar to "Note Off".
Pitchbend
Pitchbend is a MIDI message. Although pitchbend mes-
sages are similar in function to control change messages,
they are a distinct type of message. The reason for this
distinction is that the resolution of a pitchbend message
is substantially higher than that of a conventional Con-
troller message. The human ear is exceptionally sensitive
to deviations in pitch, so the higher resolution is used
because it relays pitchbend information more accurately.
Release
An envelope parameter. The term "Release" describes the
descent rate of an envelope to its minimum value after a
trigger is terminated. The Release phase begins immedia-
tely after the trigger is terminated, regardless of the enve-
lope's current status. For instance, the Release phase may
be initiated during the Attack phase.
Resonance
Resonance is an important filter parameter. It emphasizes
a narrow bandwidth around the filter cutoff frequency by
amplifing these frequencies. This is one of the most po-
pular methods of manipulating sounds. If you substantial-
ly increase the resonance, i.e, to a level where the filter
begins self-oscillation, then it will generate a relatively
clean sine waveform.
Sustain
An envelope parameter. The term "Sustain" describes the
level of an envelope that remains constant after it has run
through the Attack and Decay phases. Sustain lasts until
the trigger is terminated.
System Exclusive Data
System exclusive data allow access to the heart of a MIDI
device. They enable access to data and functions that no
other MIDI messages are able to address. "Exclusive" in
this context means that these data pertain only to one
device type or model. Every device has unique system
exclusive data. The most common applications for SysEx