User guide

APPENDIX A: GLOSSARY
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Flywheeling: Another name for Freewheeling. See
Freewheeling below.
Freewheeling: A process in which a synchronizer, such as
the MIDI Express XT, continues to generate time code
even when it encounters drop-outs in a time code source.
Converters may briefly lose synchronization during a
drop-out and, in turn, momentarily stop converting time
code. The MIDI Express XT can freewheel up to 32
frames, making it insusceptible to drop-outs.
Genlock: A process in which a video generator (graphics,
picture, or VITC) is locked in phase with an external
source.
Guard Track: An empty track adjacent to the LTC track on
a multitrack tape recorder. A guard track prevents
crosstalk from another track, which can interfere with the
time code and cause synchronization problems.
Hard Record: A mode on a VTR that erases and records all
tracks simultaneously.
House Sync: A process in which all video equipment in a
studio is connected to and genlocks to a single video sync
generator.
Input cable: One of the eight (or sixteen) MIDI IN jacks in
a MIDI Time Piece network.
Insert Record: A mode on a VTR that records on the video
tracks without recording on the audio tracks, or vice versa.
Jam Sync: The process of creating fresh, error-free time
code or extending existing time code on tape by locking a
time code generator to existing code.
LT C : Longitudinal Time Code. The Society of Motion
Picture and Television Engineers (SMPTE) time code
format, expressed in audio form as an 80-bit binary audio
signal, that describes the location of each frame on film,
video, or audio tape in hours, minutes, seconds, and
frames. LTC’s video counterpart is VITC (Ve r t i ca l Inte r va l
Time Code), which is the same time code format in the
form of a video signal. In audio production, LTC is often
referred to as SMPTE or SMPTE time code since VITC is
seldom used.
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