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Wave Machine Labs Auria 48 Track IPAD Studio $50.00 @Diggiti

This is a 48-track iPad music production app (audio only, it would seem) that, providing you have a suitable USB audio interface, enables you to record up to 24 tracks at once. 


There's multitrack editing, AAF support (so that you can move session files to your main DAW) and, perhaps most interestingly - and in the developer's words VST plug-in support