183 APPENDIX B - GLOSSARY
K
Key Follow
Modulation source proportional to the MIDI note number i.e.
which key you play.
Key Pressure
See Polypressure.
L
Layer
Two or more sounds played in unison. Achievable in Multi mode
by setting PARTs to the same MIDI channel.
LED (Light Emitting Diode)
Electronic component often used for displaying switch status
on instrument panels. Most of the LEDs on the TI desktop are
red, those on the Pølar are white.
LFO (Low Frequency Oscillator)
Generally used as a cyclic modulation source, the LFOs in the
Virus can alse serve as “one shot” envelopes (when set to Enve-
lope Mode).
M
Mark-Space-Ratio
See Pulse Width.
MIDI
Acronym for Musical Instrument Digital Interface. The standard
protocol used for communication between electronic musical
instruments and computers.
MIDI Feedback Loop
Problem caused by e.g. the following situation: MIDI output is
connected to MIDI input on the same device (via any route, e.g.
through a computer and back again). If MIDI input is also mir-
rored at MIDI output (see “Soft Thru” on page 153), this will
cause data feedback.
Mode
Generic term for any exclusive, switchable “type” or fundamen-
tal way of working.
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