I've been experimenting with sequencing iMini, Sunrizer and Magellan from BM2 using virtual MIDI. However, I've found that the timing of parts created in this way is not good. For instance, if I create a 16th-note bassline, then examine it closely in an audio editor, none of the notes fall exactly on the beat.
Worse, some of the notes fall slightly in front of the beat, while some fall slightly behind, so it isn't just a case of needing to compensate for a few ms of latency.
This behaviour is the same whether I record into BM2 via Audiobus, into BM2 via Inter-App Audio, or into Auria via Audiobus. Therefore I assume that it's an issue with the MIDI, rather than the audio, side of things.
I wonder if anyone else has had similar problems? I'm using an iPad 4.