|
gl3ny
Jitter should not be interpreted as the difference between the max and min deviation from norm. Those would be extreme values and represent the worst case. Jitter is normally interpreted as the average deviation over time from the expected value. Miditest states in the readme file that it calculates a jitter value using the standard deviation formula. So what it gives you in the results is the average time and then the standard deviation for that average. The standard deviation tells you the average variance from the expected average value: in effect the average change from the average. So what your results tell you is although your receiving latency is quite high, the jitter or deviation from this latency is pretty good. Most of your results are between 5-10ms and about .5% are between 10-20ms with an average variance of .65ms. So most of the time things are stable if slow with occasional peaks.
Having said all of that it should be remembered that midi interfaces are only one part of the chain. Midi sequencers can introduce just as much or even more variance as midi interfaces on either playback or recording. And of course if you are playing hardware synths then you have latency and jitter associated with the hardware. So getting a good interface is only the beginning. The app you are using may be messing things up as much.
Jon
|