It’s free for now, and not sure if anyone here already knew about it!
"A custom sample mashing app designed by Aphex Twin.
Samplebrain chops samples up into a ‘brain’ of interconnected small sections called blocks which are connected into a network by similarity. It processes a target sample, chopping it up into blocks in the same way, and tries to match each block with one in its brain to play in realtime.
This allows you to interpret a sound with a different one. As we worked on it (during 2015 and 2016) we gradually added more and more tweakable parameters until it became slightly out of control."