User Manual

Front Panel 12Apollo x16 Hardware Manual

(5) CLOCK Indicators

The clock source and status are displayed with these indicators. Either internal (INT) or

external (EXT) is displayed. The clock source is set within the Console application; see

the Apollo Software Manual for details.

Internal Clock

When set to internal clock, the INT indicator is illuminated white.

External Clock

Apollo x16 can use an external digital clock source from the Word Clock or AES/EBU

inputs. The EXT indicator has two possible states:

White – When set to external clock and a valid clock signal is detected at the

speciﬁed port, the EXT indicator is illuminated white and Apollo x16 is synchronized

to the external clock source.

Red – When set to external clock and a valid clock signal is NOT detected at the

speciﬁed port, the EXT indicator is illuminated red and the internal clock remains

active instead. In this situation, if/when the speciﬁed external clock becomes

available, Apollo x16 switches back to the external clock, and the EXT indicator is

illuminated and white.

Important: When set to use any external clock source, Apollo x16’s sample rate

must be manually set to match the sample rate of the external clock.

(6) METER Indicators

These indicators show the current state of the Channel Level Meters (#3). The current

state is changed with the METER switch (#9).

IN – When IN is illuminated, the channel meters display analog input signal levels.

OUT – When OUT is illuminated, the channel meters display analog output signals

levels.

(7) Sample Rate Indicators

These indicators display the current sample rate setting for A/D and D/A conversion.

The sample rate is set within the Console application or the host DAW; see the Apollo

Software Manual for details.