APPENDIX A: GLOSSARY
135
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 (Ver t i ca l In t e r val
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.
MIDI: Musical Instrument Digital Interface. An
information protocol developed in the early 1980’s by
synthesizer and electronic instrument manufacturers to
allow devices to communicate musical performance data
to one another.
MTC: MIDI Time Code. A form of time code, digitized
within the MIDI format, that expresses time in hours,
minutes, seconds, and frames, just like SMPTE time code
(LTC and VITC).
Network: Two MIDI Time Pieces connected via their
NETWORK serial ports with a mini-DIN 8 cable.
Non-drop Frame: A SMPTE time code format that does
not drop any frames. Its counterpart, Drop Frame, skips
over the first two frames of every minute (except every
10th minute). Non-drop is the least confusing format and
should be used unless Drop Frame is required. Drop-
frame is required only with color video programs in which
the SMPTE time code numbers must precisely match the
actual elapsed time.
NTSC: National Television Systems Committee Format. A
system of coding color information for broadcasting
television formulated by the NTSC. NTSC uses 30 frames
per second for black and white and 29.97 frames per
second for color.
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