I'm a long time Acid Pro user so building drum tracks with loops is quite easy to do with Acid. However, since I've upgraded to Windows 7 and using SonarX2 I don't feel the need to drop the upgrade price to have Acid run on win7 just for drums.
 
When it comes to midi I'm pretty much in the dark, especially when it comes to drum tracks. I don't know how to do it!
 
The project I'm working on is based on an old song I was tinkering with in Acid. I found the saved drum track I rendered to MP3. The problem is it doesn't sound that great. With some EQ on it it sound better, but still not great.
 
My question is this. Is there any possible way to convert the MP3 to a midi format so I can load it into Sonar and ezdrummer? If not how can I go about creating my own midi file to duplicate it? Any good video tutorials on this available?

If you still have the loops that you made that drum track from you can do the very same thing with Sonar with it. Sonar uses Acid loops in the same way as Acid does.

You can use Audiosnap to extract a MIDI track of the drum beats. 

Another suggestion - since you have EZDrummer, you might try adding that to your project, finding a loop in EZD that is close to your original loop, drag that EZD loop onto a MIDI track, and then you can open the MIDI clip to see it.

From there you could delete/add MIDI notes. You'll be able to see which note is used for the kick drum, for example, and you could move, delete, or add more of those as desired. Turn on quantize to help get them aligned to the beat.

There's really no way for me to find a midi in ezd that comes close to this since I did a bit of chopping and editing in acid to make it.

How might one go about extracting midi from this with audiosnap to open in ezd? I watched a video for audiosnap and I got the basics of it, but not sure how to get the midi file back into ezd.

All you do is create a MIDI track. Once you have MIDI from audiosnap its a matter of outputting that MIDI track to the input of EZdrummer.

What John said, you can still use your generic loops in Sonar but it doesn't do it as easily as the Acid did. I too once had to part ways with Acid, it was like an old girlfriend~ You'll find using MIDI with some practice is WAY better than loops, as you can modify each hit and control everything vs being stuck with a loop. I only use BFD Drums so I'm not sure if EZdrummer or any of the others come with MIDI grooves, which are just loops and beats already made you can copy/modify etc...

I have tried to use loops in Sonar like I do in Acid, and you're right, it's not quite as easy. I did download Acid Express. It sucks, but it does do the job I need for loops and keeps me from dropping money to upgrade a program just for loops I'm trying to get away from.

I would love to learn midi. For some reason when I play a midi file or groove in ezd it sounds great, but when I load the same file in sonar it sounds completely different.

As for converting the file I have to midi with audisnap. I can see the markers added to the clip, but no clue how to output the midi to the input of ezd.

[<font]Using midi clips is the same thing. You just need two tracks. One midi track routed to your drum synth and an audio track with it's imput being fed by the drum synth and it's output to ......