Arptron has been updated to v1.2
Here's what's new:

*New dual delay section with stereo spreader
*Added gate control to the arpeggiator
*Can now process audio through the arp gate and the delay
*Added audio mixer: let's you crossfade between the oscillator's signal
and the incoming audio's signal
*Added MIDI button: There was a problem with recording notes in some hosts
because of the arp's MIDI output, this button allows you to disable the output
if it is not in use.
*Added LFO routing,
*Added Filter Envelope
*LFO rate can now go alot slower: from 16 beats to 1/16 of a beat
*Enabled MIDI patch change
*Each parameter is now assigned it's own MIDI cc#

Here's a MIDI cc screenshot

Arptron is part of the Neurosynth pack, available here