Just because Anvil tries to show sheet music notation does not imply that the grouping is applied back to your original data; the original timestamps should have been kept intact. (Did you try to play it back?)

I do not know of any DAW that changes the timing of your notes (unless you explicitly tell it to do so).

If you don't like the sheet music view, use the piano roll instead.

The issue is not "changing midi note timing." It's latency, or more accurately, latency compensation (or lack thereof.) If you are playing a bunch of virtual instruments, the code used to create the virtual instrument will introduce latency between the time that the midi note on message appears and the sound comes out. The best daws (pro tools, cube base, etc) have automatic latency compensation. Others may not. Also, you may have through-put issues if your DAW computer is being taxed to the point of creating midi note logjams. You will want to read up via Google on techniques of midi note placement in order to create a work-around for your problem. You have not give enough specifics for an accurate, in-depth answer to your question.

What is your machine? How much RAM? What is the microprocessor? Are your running *NOTHING* else while running your DAW? Have you optimized your machine for audio production applications?

Very little of this stuff is straightforward. You'll need to education yourself. Keep posted here, and google the heck out of your issues, challenges and plans.

Good luck!

This is an old posting, going back to May 2017, and the OP has not bothered to provide any follow-up, and may well have moved on to other things, and may no longer be watching this forum.

Just to follow-up the first reply, yes, the detail of a midi recording, on even the simplest of systems, is massive, and the detail will usually be MUCH more than any normal MUSICAL standard will require. Midi will pick up and store every tiny imperfection in playing technique, and if you show this data as a score it will look quite silly. Nothing like a normal score for the same music would. Quantisation and similar processes will bring the displayed info back towards 'sensible', and this MAY (if you so instruct) change the stored midi data, but this NEED not be the case. As suggested, the piano roll type display may be more helpful.

So, the question of the 'accuracy' of the data raised by OP may well be nothing to do with midi, or with the software (DAW or whatever) used, but merely with the settings of the selected display mode. If you're not happy with what you see, then change the settings, or change the display mode.

Geoff

Agreed!