CHAPTER 31. MIDI FACT SHEET 505
At 44.1 kHz and 512 sample buffer, occasional events with +/- 6 ms occurred. In all
cases, the majority of the jitter occurred at +/- 1 ms.
Interface C: For most of the tests, the maximum jitter was +/- 5 ms. At 96 kHz and 512
sample buffer, there were a small number of events with between +/- 6 and 8 ms of
jitter. At 44.1 kHz and 1024 sample buffer, there were a small number of events with
jitter as high as +/- 10 ms. In all cases, the majority of the jitter occurred at +/- 1 ms.
OS X:
Interface A: At 44.1 kHz and 1152 sample buffer, jitter was fairly evenly distributed
between +/- 4 and 11 ms. For all other tests, the maximum jitter was +/- 5 ms. In all
tests, the majority of the jitter occured at +/- 1 ms.
Interface B: For most of the tests, the maximum jitter was +/- 4 or 5 ms. At 44.1 kHz
and 1152 sample buffer, there was a fairly even distribution of jitter between +/- 2 and
11 ms. In all cases, the majority of the jitter occurred at +/- 1 ms.
Interface C: In all tests, the maximum jitter was +/- 1 ms, with most events occurring
with no jitter.
We also performed a similar procedure for testing the timing of outgoing MIDI events, as
represented in the following diagram:
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