I hope this means we'll be seeing Audiobus support soon.
Thanks for contacting us. Some of the presets for Alchemy Mobile are based on arp sequencers, and a few of them are looped or rhythmic content. In some cases adjusting the individual performance controls will change or stop the rhythm, but otherwise it's not possible to edit the presets without having access to the full version of Alchemy.
We are preparing a major update to Alchemy Mobile, and will be changing the content slightly (although the current presets will still be available). The new content will be more focussed on traditional instruments.
Let us know if you need any more information.
Camel Audio Support