From a73577a45a744034eb856fff7fefd1bfc8151991 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Wed, 18 Dec 2019 17:34:39 -0700
Subject: [PATCH] do not try to process audio in a diskreader with no audio
 playlist

---
 libs/ardour/disk_reader.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libs/ardour/disk_reader.cc b/libs/ardour/disk_reader.cc
index 700a058392..1d306230f0 100644
--- a/libs/ardour/disk_reader.cc
+++ b/libs/ardour/disk_reader.cc
@@ -309,7 +309,7 @@ DiskReader::run (BufferSet& bufs, samplepos_t start_sample, samplepos_t end_samp
 		disk_samples_to_consume = nframes;
 	}
 
-	if (c->empty()) {
+	if (c->empty() || !_playlists[DataType::AUDIO]) {
 		/* do nothing with audio */
 		goto midi;
 	}