def test_sequence_duration_and_offset_with_append(self):
        from sebastian.core import OSeq, Point
        OffsetSequence = OSeq("offset", "duration")

        s1 = OffsetSequence()
        s1.append(Point(duration=10))
        s1.append(Point(duration=10))
        self.assertEqual(20, s1.next_offset())
        for point, offset in zip(s1, [0, 10]):
            self.assertEqual(point['offset'], offset)
Set current audio channel.
dataset/ETHPy150Open jtauber/sebastian/tests/test_sequences.py/TestSequences.test_sequence_duration_and_offset_with_append--crossover with--dataset/ETHPy150Open disqus/playa/playa/lib/vlc.py/libvlc_audio_set_channel