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-rw-r--r--libs/ardour/ardour/slavable_automation_control.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/libs/ardour/ardour/slavable_automation_control.h b/libs/ardour/ardour/slavable_automation_control.h
index 88114d24c6..4a3c990147 100644
--- a/libs/ardour/ardour/slavable_automation_control.h
+++ b/libs/ardour/ardour/slavable_automation_control.h
@@ -99,6 +99,7 @@ protected:
double val_ctrl () const { return _val_ctrl; }
double val_master () const { return _val_master; }
+ double val_master_inv () const { return _val_master == 0 ? 1.0 : 1.0 / _val_master; }
double master_ratio () const { return _val_master == 0 ? master()->get_value() : master()->get_value() / _val_master; }