Alesis AI-2 Reference Manual page 7

Storage of Setups. The AI-2 can read and write setup informa-
•
tion to the beginning of each ADAT tape, for later retrieval. This
information (tape table of contents) is in the same format as the
ALESIS BRC information. The AI-2 can read existing BRC
information from the tape and will use only the data that it
requires. The AI-2 intelligently handles all the existing tape
header data so that it can be restored to tape non-destructively.
AI-2 information saved to a new tape can also be used by a
BRC in future sessions.
Editor and Synchronizer Control. The AI-2 permits ADAT
•
tape recorders to be directly controlled from a video editor using
SONY protocol or to be integrated into a TimeLine machine
control system. The AI-2 ensures a transparent interface to the
controller and provides features such as editor track mapping.
Time Code Chase. The AI-2 has a built in broadband time
•
code reader and chase unit. The AI-2 will follow SMPTE or
EBU time code that is fed into the reader input.
Time Code and MIDI. The AI-2 generates Longitudinal time
•
code and MIDI time code based on the ADAT's position. The
time code generated can be 30, DF, 25 or 24 frame code with
30 and DF being generated at a frame rate of either 30 or
29.97 fps (frames per second). The AI-2 generator is user
selectable to run in Play, Stop and Wind transport modes.
Selectable Sample Clock Rates. The AI-2 will lock the ADATs
•
to either internal or external digital audio word clocks. When the
AI-2 is generating the ADAT sample clock, a nominal sample
rate of 48 KHz, 47.952 KHz, 44.1 KHz or 44.056 KHz can be
selected by the user. When a sample rate other than 48 KHz is
selected, the AI-2 takes care of the frame rate conversions, so
the controlling device always sees time code at the correct rate.
The AI-2 even includes a variable sample clock option so the
ADATs can be run in varispeed if required.
2