From b68c28986cb2e142c7559351e752e24ef2f19024 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Thu, 7 Jul 2016 18:02:36 +0200
Subject: fix AU bus sidechaining

---
 libs/ardour/audio_unit.cc | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

(limited to 'libs')

diff --git a/libs/ardour/audio_unit.cc b/libs/ardour/audio_unit.cc
index d276320d33..74e0cc2800 100644
--- a/libs/ardour/audio_unit.cc
+++ b/libs/ardour/audio_unit.cc
@@ -1267,9 +1267,10 @@ AUPlugin::can_support_io_configuration (const ChanCount& in, ChanCount& out, Cha
 				continue;
 			}
 			for (uint32_t i = 1; i < input_elements; ++i) {
-				for (uint32_t j = 0; j < bus_inputs[i]; ++j) {
-					io_configs.push_back (pair<int,int> (possible_in + j, possible_out));
-				}
+				// can't use up-to bus_inputs[]
+				// waves' SC-C6(s) for example fails to configure with only 1 input
+				// on the 2nd bus.
+				io_configs.push_back (pair<int,int> (possible_in + bus_inputs[i], possible_out));
 			}
 		}
 	}
-- 
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