Absolute favourite is Animoog - The interface is just so perfect for a touch screen device. Of course Loopy HD for looping. SampleTank is great for quickly creating beats and loops (and so is Figure for creating a random loop to build on). Bebot is just a heck of a lot of fun.

I use Amplitube for a virtual guitar amp and it works really well with little lag. I've got a bunch of keyboard synth app, of which my faves are: Arturia iSEM, iMS-20 and Magellan.

I know these are mainly old apps which have been around for a while, but I have hardly bought new apps these days because these ones have served me for years.

For a sample of Animoog plus SampleTank - https://soundcloud.com/cyberferret/in-a-bad-moog

AudioKit Synth One is fantastic, and it's all open-source too.

Thanks for the link. To close the loop the audio kernel documentation in AudioKit Synth One references the OP.

https://github.com/AudioKit/AudioKitSynthOne/blob/master/Aud...

It's interesting in that it's written in Objective-C++ which in xcode are suffixed with .mm - This is for performance reasons I assume.

I didn't know about Objective-C++ and here is a link about it. Is it kind of pushed into a dusty closet? Because I only found an archive.org link.

https://web.archive.org/web/20101203170217/http://developer....