I've just been reading about how different samplers are sample acurate and some are not. Main thing being if you use the audio tracks. Will they line up perfectly, or will they start off the mark by several samples? I've used them with great results. I was just wondering if it's something I need to keep my ears on...

If you line up two audio tracks with the same audio and hear a flange effect, then that would mean it is not sample accurate. But if you just hear it louder, then it is.

As per my testing, with the synth engine, if you assign the same sample to all 4 tones, you don't hear a flange effect, so this means all 4 samples start exactly from the same position, and yes this is sample-accurate.

Bad ass, Thanks Art!