prevent duplicate locations in users sets

1 files changed, 4 insertions, 0 deletions

diff --git a/src/adlmidi_midiplay.cpp b/src/adlmidi_midiplay.cpp
index f1a0c56..ae37e06 100644
--- a/src/adlmidi_midiplay.cpp
+++ b/src/adlmidi_midiplay.cpp
@@ -1569,6 +1569,10 @@ void MIDIplay::killOrEvacuate(size_t from_channel,
         if(adlch.users.size() == adlch.users.capacity())
             continue;  // no room for more arpeggio on channel
 
+        if(!m_chipChannels[cs].find_user(jd.loc).is_end())
+            continue;  // channel already has this note playing (sustained)
+                       // avoid introducing a duplicate location.
+
         for(AdlChannel::users_iterator m = adlch.users.begin(); !m.is_end(); ++m)
         {
             AdlChannel::LocationData &mv = m->value;