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-rw-r--r--libs/ardour/disk_io.cc2
1 files changed, 2 insertions, 0 deletions
diff --git a/libs/ardour/disk_io.cc b/libs/ardour/disk_io.cc
index e001e58aa5..076912b1d0 100644
--- a/libs/ardour/disk_io.cc
+++ b/libs/ardour/disk_io.cc
@@ -57,6 +57,7 @@ DiskIOProcessor::DiskIOProcessor (Session& s, string const & str, Flag f)
, _need_butler (false)
, channels (new ChannelList)
, _midi_buf (0)
+ , _mbuf (0)
, _samples_written_to_ringbuffer (0)
, _samples_read_from_ringbuffer (0)
{
@@ -189,6 +190,7 @@ DiskIOProcessor::configure_io (ChanCount in, ChanCount out)
if (in.n_midi() > 0 && !_midi_buf) {
const size_t size = _session.butler()->midi_diskstream_buffer_size();
_midi_buf = new MidiRingBuffer<samplepos_t>(size);
+ _mbuf.resize (1048576);
changed = true;
}