[gl3ny]

All I’m concerned about and I’m sure people most people who use sequencer are concerned about is the reality of how far their midi timing is off in real terms rather than some formula to make it look better than it really is.

Really come on! LoL surely you can see my point? What does 0.75ms tell me? It doesn’t mean jack to me when in reality the timing can be off by up to 5ms. Where is the correlation there for the average user? So if you want to use the standard deviation, that’s cool! If I was in the business of selling midi interfaces then ok I would use the standard deviation method.

All I wanted to point out is that MidiTest is grossly misleading when it comes to its message jitter report just like a manufacturer would be and I think I accomplished that.

I won’t mention midi jitter again because that seems to be a standard and it’s always been measured that way. I’ll don’t know if there is a name for how I have calculated my problem but if there isn’t I’d like to reserve the name ‘midi true jitter’ or ‘midi titter’ for short.

I want you to know I’m not taking offense here. I actually think it is a good discussion. We do need to work together but we need to be on the same page with what is a good number and what is not. Sorry but 0.75 mean nothing to me so. Can anyone come up with a formula to convert jitter to titter?

Seriously now,

Originally Posted by qtuner

In documenting these, I think it would also be helpful to identify for PC which Timer each interface uses.

I saw a tool last week that would test drift and identify which driver to use. Does anyone know what I'm talking about? I can't find it now.

the app is miditime.exe
found here
Parapoetica: PC MIDI Timing and Nuendo

That is a good reference for anyone at the beginning of trouble shooting a midi interface even though it’s a bit old there is much that is still valid.

One thing I got out of it that article I think deserves some attention is DirectMusic drivers. I’d be interested to know if anyone has any kind of jitter, titter or latency problem with an interface that uses these DM drivers?

My RayDat uses DM drivers and it is extremely low titter @0.9ms (0.15ms Midi Jitter).