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-rw-r--r--libs/ardour/processor.cc5
1 files changed, 4 insertions, 1 deletions
diff --git a/libs/ardour/processor.cc b/libs/ardour/processor.cc
index 76ff7c36a1..a99d09049a 100644
--- a/libs/ardour/processor.cc
+++ b/libs/ardour/processor.cc
@@ -268,12 +268,15 @@ Processor::configure_io (ChanCount in, ChanCount out)
Derived classes must override and set _configured_output appropriately
if this is not the case
*/
+ bool changed = _configured_input != in || _configured_output != out;
_configured_input = in;
_configured_output = out;
_configured = true;
- ConfigurationChanged (in, out); /* EMIT SIGNAL */
+ if (changed) {
+ ConfigurationChanged (in, out); /* EMIT SIGNAL */
+ }
return true;
}