Fixed drums, mkiv

mkiv now drops empty streams, avoiding a crasher in broadcast.

drums now starts on the alternate port scanned by the broadcaster so as to not conflict with client.py.

drums.py

@@ -16,7 +16,7 @@ parser.add_option('-v', '--verbose', dest='verbose', action='store_true', help='
 parser.add_option('-V', '--volume', dest='volume', type='float', default=1.0, help='Set the volume factor (nominally [0.0, 1.0], but >1.0 can be used to amplify with possible distortion)')
 parser.add_option('-r', '--rate', dest='rate', type='int', default=44100, help='Audio sample rate for output and of input files')
 parser.add_option('-u', '--uid', dest='uid', default='', help='User identifier of this client')
-parser.add_option('-p', '--port', dest='port', default=13676, type='int', help='UDP port to listen on')
+parser.add_option('-p', '--port', dest='port', default=13677, type='int', help='UDP port to listen on')
 parser.add_option('--repeat', dest='repeat', action='store_true', help='If a note plays longer than a sample length, keep playing the sample')
 parser.add_option('--cut', dest='cut', action='store_true', help='If a note ends within a sample, stop playing that sample immediately')
 parser.add_option('-n', '--max-voices', dest='max_voices', default=-1, type='int', help='Only support this many notes playing simultaneously (earlier ones get dropped)')

mkiv.py

@@ -651,6 +651,18 @@ for fname in args:
                         i += 1
         print '...culled', ev_cnt, 'events'
 
+    print 'Culling empty streams...'
+    st_cnt = 0
+    for group in notegroups:
+        torem = set()
+        for ns in group.streams:
+            if not ns.history:
+                torem.add(ns)
+        st_cnt += len(torem)
+        for rem in torem:
+            group.streams.remove(rem)
+    print '...culled', st_cnt, 'empty streams'
+
     if options.verbose:
         print 'Final group mappings:'
         for group in notegroups: