Yes, I can think of two things and I hope I explain it well.
1)Press Shift + Loop On Button: It'll bring you sequence looping window. With this, you don't really have to know the tempo of a sample. Given that you have a sample(s) already and you've mangled it however you want, just go ahead and lay the sample down however you like. Play your sequence from the beginning, and according to your ears, stop it wherever you want. When you stop it (don't go back to the beginning), look on your top left of the window. It'll give you the measures for where you stopped the track. Open up your seqeunce loop window and match that to the measures on the top left. Press the Loop On button so it becomes lit. Play your sequence now and it should do a perfect loop to wherever you set it. If the loop finishes too eaqrly or too late, you can always fine tune the last three digits in the sequence loop window. Usually go up or down about 50 with the last three digits. NOTE: I only do this in a midi track, not with an audio phrase in an audio track.
After your sample has been laid down, go ahead and lay your drums (it should have pre-loaded drumkits. You can access this with the import button. Then the pathes folder. then the drumkits folder. You can import a drum track to any track right away, or you can audiiton the sounds AND PLAY A SEQUENCE AT THE SAME TIME on the 16 pads.) You'll notice that even though the default tempo of the MV doesn't match the tempo of your pattern, you can still slow or speed up your midi patterns from the tempo window.
2) If you assign a sample to a patch phrase instead of audio phrase and you wanna REVERSE THE SAMPLE, simply hold the sample pad down and press the clip board button on the left. Scroll to an audio track, press the clip board button and press any empty pad in the audio track. Then hold that new pad down and press quick edit button. It'll give a new edit window which has PARAMETERS ONLY FOR AUDIO PHRASES. You'll notice there is a reverse on and off button. Turn it to on and hold the pad down and press the clip board button. Go to your midi track of choice and press the clip board button and press whatever pad you want the reversed sample on. VOILA!!! You can MANGLE IT EVEN MORE by going to the QUICK EDIT SCREEN IN A MIDI TRACK.
3) Accessing the Attack, pitch, fine tune, and ANALOG FEEL of an entire patch. Say you have A DRUM PATTERN and you wanna change the attack for all the notes in that drum pattern. Select the MIDI TRACK that the drum pattern is on and go to the QUICK EDIT SCREEN FOR ANY OF THE PADS(you can change the attack for a single note here, instead of all the sounds in the patch/track). PRESS THE EXIT BUTTON. Now it'll bring you to a PATCH EDIT SCREEN. Notice at the bottom middle it'll say Attack. You can raise and lower the attack (I usually do) for the ENTIRE TRACK. Go ahead and raise it by 4 and press the play button. It should play back your drum pattern with a higher attack rate. You'll notice you can also change the pitch and fine tune the whole track here. There's also an ANALOG FEEL SECTION. I guess this just makes all the sounds sound a little analog. You'll definitely notice a difference, but I don't use it much.
I have the MV8000 and I'm really sorry for making all that so long, but I wanted to pass onto you what I've learned with my machine. If you have any more questions, let us know. peace.