Hi. I have recently worked through the excellent Logic 201 tutorial section on beat-mapping and I have a question regarding its application. I posted this on the Sonikmatter forum a couple of days ago but have so far had no response so I thought I'd post it here and see if anyone might have some insight. I hope that's cool. I am working on a piece which is based on a long, picked acoustic-guitar track. That track was recorded to the click and lasts about 4 minutes. The recording sticks fairly well to the click for the most part but not perfectly. I want to add some other tracks to it, drums and bass included. The drums are based on an initial midi loop which will be varied throughout. When I played the drum track over the guitar, it really showed up the imperfections in the guitar in terms of it wandering on and off the grid. So I tried quantizing the guitar track in the sample editor using the "Guitar picked" setting, which turned out pretty hopeless. Then I went back to the original (thankfully I'd backed it up!) and beat-mapped the whole thing. Now it's pretty good, much better than before. Obviously the drums now lock to the new grid and play in sync with the guitar. However, as the tempo goes through its multiple changes at some places this is really noticeable, mostly where the snare falls just a little too late or it audibly picks up the tempo just a trace etc. Now it's not too bad - I think I did a reasonable job of the beat-mapping in that there aren't too many very radical tempo changes - but the result is not really good enough. I'm wondering if there is a way to neaten this up in the places that need it (or all the way through). I've tried shifting the drum hits a little at those points as well as choosing different nearby transients but that throws the groove out in a different way. Also, is what I have described above the best way to proceed or would it in fact be better to quantize the audio track, obviously using different/better parameter settings than I did before? Any help appreciated.