From d6d5903a24477f6a41d9501ffc80120b46b39553 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Thu, 26 May 2016 02:20:14 +0200
Subject: [PATCH] fix Audio Unit BBT

---
 libs/ardour/audio_unit.cc | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/libs/ardour/audio_unit.cc b/libs/ardour/audio_unit.cc
index 9fc9416ac5..37c96a30ca 100644
--- a/libs/ardour/audio_unit.cc
+++ b/libs/ardour/audio_unit.cc
@@ -1765,9 +1765,10 @@ AUPlugin::get_beat_and_tempo_callback (Float64* outCurrentBeat,
 	tmap.bbt_time (_session.transport_frame() + input_offset, bbt);
 
 	if (outCurrentBeat) {
+		const double ppq_scaling = metric.meter().note_divisor() / 4.0;
 		float beat;
-		beat = metric.meter().divisions_per_bar() * bbt.bars;
-		beat += bbt.beats;
+		beat = metric.meter().divisions_per_bar() * (bbt.bars - 1) * ppq_scaling;
+		beat += (bbt.beats - 1) * ppq_scaling;;
 		beat += bbt.ticks / Timecode::BBT_Time::ticks_per_beat;
 		*outCurrentBeat = beat;
 	}