Alesis BRC - C Using the AI-1

66
tracks.
• A digital source track cannot be selected as a digital destination
track (i.e. digital source tracks will not be allowed to be record
enabled when DIGITAL I/O is enabled).
• When copying digital tracks, any track delays and machine offsets
will be in effect.
4.7C Using the AI-1
The Alesis AI-1 is used to route up to two tracks at a time to other
digital audio recording equipment from other manufacturers,
including: multitrack digital recorders, hard disk recorders, digital
effects devices, CD recorders and DAT machines. Since the ADAT
digital bus is a proprietary multichannel interface, it is necessary to
convert the digital audio of the optical bus into a standard that is
compatible with other equipment. The two standards supported are
AES/EBU and S/PDIF. It might also be necessary to convert the
sample rate of incoming or outgoing digital audio. The AI-1 can
convert back and forth between 48 KHz and 44.1 KHz.
While in Edit mode, if the DIGITAL I/O button is pressed a second
time when the first display reads "AES/EBU" or "S/PDIF", (or if it is
pressed a third time when the first display reads "ADAT" and an AI-1
is connected), the user may select the source tracks that will output to
the AI-1. When the button is pressed a third time, you may select the
output clock rate for the AI-1, which can be either 48 KHz or 44.1 KHz.
This allows you to perform sample rate conversion.
To route tracks between ADAT and the AI-1:
1. Press the EDIT button (the EDIT button LED will go on to indicate
you are in Edit mode);
2. Press the DIGITAL I/O button;
3. Use the UP/DOWN buttons to select the digital input you wish to
use as a source for recording (AES/EBU or S/PDIF). These two
options are only shown if an AI-1 is connected.
If either AES/EBU or S/PDIF is selected as the input source, any tracks
that are record enabled while DIGITAL I/O is turned on will record
the selected input from the AI-1. Since only two inputs are available
(left and right), these inputs will alternate assignment between all
selected record tracks if more than two are selected.