Operating instructions

The TH3 Signal Routing Window
The TH3 Signal Routing window permits the TH3’s
internal signal routing to be modified for unusual
applications.
The default settings are as shown, with all inputs
and outputs enabled, and the supplementary echo
canceller inserts bypassed. Most applications do
not require any change to these settings.
Unchecking AUX Input mutes the TH3’s AUX IN
port. AUX OUT continues to function normally,
and the TH3’s other inputs are unaffected.
Unchecking Expansion Port prevents the TH3 from accepting input signals from any expansion port source. The
checkboxes below (Main In and Mix Minus In) offer individual muting of the expansion port inputs.
Unchecking Main Out or Mix Minus Out prevents the TH3’s output from reaching the indicated expansion port
destinations.
Checking Use External Canceller enables the Supplementary Echo Canceller inserts on the rear panel. If no
external echo canceller is connected, the signal paths will be incomplete and the TH3 will not function.
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