Alesis QSR 64 Reference Manual page 26

Chapter 3: Connections
48 KH I
Z N
If your ADAT system has an Alesis BRC Remote Controller, the QSR's digital clock
must be synchronized to the clock coming from the BRC. This requires that a
connection be made providing the clock signal to the QSR and that the QSR's Clock
function be set to either one of its two external settings (Ext48kHz or
Ext44.1k).
Connect a BNC-to-BNC cable (such as the Alesis BN cable) between the BRC's 48
kHz CLOCK OUT and the QSR's [48 KHZ IN]. Set the Clock function to either
Ext48kHz if the BRC is set to 48kHz, or Ext44.1k if the BRC is set to 44.1kHz.
For more information about the Clock function, see page 118 in Chapter 8.
Tip: With this type of connection, the ADAT tracks will remain in tune with the QSR
even when the BRC's pitch value is adjusted.
Note: When using only one or more ADATs without the BRC, it is not necessary to
connect the 48 kHz Clock.
6 QSR Referenc