Sequencer plays same note multiple times in play_Bar()

[b8d241b26a27cbcf2c7345393]

Hi folks. Sorry for the way to proceed, I dont really know how to properly submit a patch.
But I found a bug in the sequencer and would like to share.

The issue: in the below code, the (whole) note on bBackground bar actually gets rendered as 4 quarter notes.

from mingus.midi import fluidsynth
from mingus.containers import Note
from mingus.containers import Bar
from mingus.containers import Track
from mingus.containers import Composition
from mingus.containers import NoteContainer

fluidsynth.init("timbres.sf2")

bBackground = Bar()
bDrums = Bar()

bBackground.place_notes("A-3", 1)

bDrums.place_notes("A-5", 4)
bDrums.place_notes("A-5", 4)
bDrums.place_notes("A-5", 4)
bDrums.place_notes("A-5", 4)

trackBg = Track()
trackBg.add_bar(bBackground)
trackDr = Track()
trackDr.add_bar(bDrums)
c = Composition()
c.add_track(trackBg)
c.add_track(trackDr)
print(c)

for n in range (1):
    fluidsynth.play_Composition(c, [1,2], 180)

The issue is coming from sequencer.py, line 248, in play_Bars().
for (n, x) in enumerate(cur):

The enumerate() function will return the (0,0) couple at each tick increment (due to the 2nd track having quarter notes). But this should occur only once.

Sorry again for the format, but if that can serve...

cheers', and thanks for this cool software!