That's a good point and could be a factor but i rather change my interface than change computer...Well, I think, that an "ultra fast" interface is no warranty to get better results with a MOTU m4. I'd think different. Try it on a usb 2 interface. Why? Because I had many issues due to not observed standards with usb 3 interfaces. And MOTU m4 is made for usb 2. USB 2 deserves less speed but in some circumstances better latency. Had some problems with my WACOM tablet on a usb 3 interface. Plug into a usb 2 interface and all problems were gone. Backward compatibility is often only a dream ...
It's possible...Most likely the variation is midi jitter
Interesting study! Does the table indicate that the delay of headphone output for Garritan CFX vs. Roland on-board sounds would be:So every time i was hitting a note on the keyboard,two note was recorded and i've calculated and compiled the difference between the two note.The unit that i've use are "sample".I've notice that there was a slight variation in the result for each note,play several times,most probably because of the round-robins and/or the layers...
I'm gonna do a second test and i'm gonna change a few things:Interesting study! Does the table indicate that the delay of headphone output for Garritan CFX vs. Roland on-board sounds would be:
--Buffer 16
MOTU 453/44,100 ~ 10.2ms
Quantum 160/44,100 ~3.6ms
--Buffer 64
MOTU 567/44,100 ~12.9 ms
Quantum 274/44,100 ~6.2ms
And that the Quantum output is about 6.6ms faster than that of the MOTU USB for these 2 cases?
In real life playing, how low can you get the Garritan CFX buffers without dropouts with these interfaces? I've seen quite a few people typically running buffers of 64 or 128 with consumer USB interfaces with minimal dropouts.
Using Garritan,the Quantum beat the M4 easily,before doing the test,i've compare both interface for about a hour,switching from interface every 5 mins and i could "feel" the difference.The test have just confirm what i've "felt"
That is excellent performance. Glad this worked out for you.no dropouts at all at (96 , buffer 64) which gave me almost the same feel that i've when i'm using my RD-2000.