On a video tutorial on Studio One Expert on using Sound Radix AutoAlign one of the founders Nir Averbuch stepped in to offer some very cool free advice on how to get the best results from Sound Radix AutoAlign when using it on drums.
"Hi guys, thanks so much for producing an Auto-Align tutorial! If I may, I'd like to offer some suggestions.
Auto-Align looks for correlation in the signal to calculate the optimal time and phase correction for the mics. This is important to remember when choosing the SEND and RECV sources for each track. e.g. using the the top tom mic as a reference for the kick mic will probably won't yield very good results...
As demonstrated in the video, the top snare mic is a great place to start as the initial reference for the overheads and room mics. Try aligning both left and right overhead and room mics to the top snare for the clearest snare sound and most accurate transients reproduction. Don't be shy with the Noise Floor settings, we rather miss some beats than feeding Auto-Align with irrelevant bleed.
When aligning the toms, hihat and kick mics to the overheads, it's important to feed Auto-Align with sound of those drums for the detection process rather than the snare, or you will be simply aligning the bleed of the snare into those mics. For best results, align the toms and hi-hat mics to their nearest overheads.
So if you are using Sound Radix AutoAlign or trying it then make sure you take Nir's advice, when it comes to AutoAlign he knows how to get the best from it.