Input Source A
The MX400 has both analog and digital inputs that can be connected to.  
Depending on which inputs you will be using, you need to select between 
analog or digital sources.  The MX400 offers three different input sources 
to select from: Analog Mono L, Analog Stereo, and Digital.  Input Source A 
refers to whether you will be using analog A - Front (Stereo) inputs or digi-
tal input A.  When only a single analog input is to be used, select Analog 
Mono L and connect to the A - Front (Stereo) Left input only.  All inputs 
(analog and digital) can remain connected simultaneously in the event 
you find yourself switching between using both.  Use Knob A to select the 
appropriate Input Source you will be using.
Input Source B
Input Source B is identical to Input Source A (explained above) except it 
refers to analog and digital Input Pair B only.  Use Knob B to select the 
appropriate Input Source you will be using.
Clock Source
This option allows manual selection of either the internal or external clock 
source for the MX400.  When set to 44.1kHz, the MX400 utilizes an inter-
nal clock with a 44.1kHz sample rate. When set to 48kHz, the MX400 uti-
lizes an internal clock with a 48kHz sample rate. When set to Digital, the 
unit utilizes the S/PDIF input clock source, even if an analog audio source 
is used.  The MX400 only accepts external digital clock information on the 
Digital S/PDIF A input. Refer to The MX400 and Digital I/O section on 
page 10 for more information on using digital audio sources. Use Knob C 
to select the appropriate Clock Source you will be using.
Analog Output A
The MX400 analog outputs can be configured to run in stereo or in mono.  
Each pair of outputs can be configured independently of the other.  Analog 
Out A refers to only A - Front (Stereo).  When only a single output cable is 
to be used, connect to the A - Front (Stereo) Left output only and set the 
Output mode to Mono Left.  Output Mode only affects the analog outputs.  
Use Knob A to select between Mono Left and Stereo.
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MX400 System Menus
MX400