Alesis AI-2 Reference Manual page 90

Resolving. A technique for regulating the play speed of a tape
machine by matching the rate of pulses recorded on tape with a
pulse rate from another stable source or a master tape machine.
Sequencer. A device that can record performance data for synthe-
sizers and other electronic instruments and then, on playback, pass
that data on to the instruments so that they'll play what has been
recorded. Modern sequencers use MIDI as their communications
protocol.
Setup Mode. The process of defining the user-selected
operational parameters, such as defining a specific mode or option.
Shuttle. Fast-wind, Fast-forward or Rewind.
SMPTE. Society of Motion Picture and Television Engineers. An
industry standards committee. The group responsible for develop-
ing SMPTE time code.
Speed. Speed, Frame Rate and Rate are synonymous. Time code
speed is counted in frames-per-second (fps). SMPTE time code
has two speeds: 30 fps and 29.97 fps. EBU time code is 25 fps.
Film time code is 24 fps.
Synchronizer. A device that reads time codes recorded on two or
more tape machines, compares the codes, and adjusts the
machine's tape positions and speeds based on the results of that
comparison.
Time Code Format. Time code format defines both the frame rate
and code type being used. Example: To describe a time code
format as 30 NDF is to say that the frame rate is 30 fps and the
code type is non-drop frame. Simply saying either 30 or drop frame
defines only part of the SMPTE time code.
Time Code Generator. A special signal generator designed to
generate and transmit SMPTE time code at one of the international
formats and rates.
Time Code Reader. A counter designed to read and display
SMPTE time code.
Time Code Type. The word "type" is the key to understanding this
phrase. Type defines the counting method that is employed by the
reader. There are two SMPTE types: 30 (also called non-drop
"ND" or non-drop frame "NDF") and DF (drop frame). EBU and film
types are the same as their respective speeds, 25 and 24.
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