The One Control CrocEye is an add-on MIDI programmer for the Crocodile Tail Loop (OC10). Its main purpose is to overcome the OC10's relatively basic built-in MIDI functionality.

Key features

• 70 MIDI presets — one corresponding to each OC10 program (0–69). 
• 16 MIDI channels simultaneously — lets one OC10 preset control up to 16 MIDI devices, each potentially on a different MIDI channel. 
• Program Change (PC) — send patch/program changes to MIDI pedals, processors, amps, etc.
• Control Change (CC) — send CC messages for functions such as bypass, tap tempo, parameter changes, etc. The CrocEye supports the full PC/CC ranges. 
• PC + CC in the same preset — you can configure multiple MIDI commands so recalling one OC10 preset can reconfigure several pieces of MIDI gear at once. 
• Editable preset names — each of the 70 presets can have a custom name displayed on the unit. 
• 5-pin MIDI OUT — connects the CrocEye to your MIDI pedal chain/devices. 
• POL (Power On Link) technology — the CrocEye is powered through its link connection to the Crocodile Tail Loop rather than requiring a separate power supply. 
• Compact metal enclosure — approximately 94 × 39 × 35 mm, 100 g. 

What it adds to the OC10

Without CrocEye, the OC10 is essentially limited to MIDI Program Change. With CrocEye, it can send both PC and CC commands across 16 MIDI channels, making each OC10 preset capable of changing the state of an entire MIDI rig. 

For example, pressing one OC10 preset could simultaneously:

Crocodile Tail Loop preset →

• switch physical pedal loops
• select a preset on a delay pedal via PC
• turn a reverb on/off via CC
• change a multi-effects processor preset via PC
• send another CC command on a different MIDI channel

The CrocEye therefore acts less like a standalone MIDI foot controller and more like a MIDI expansion module that makes the OC10's 70 presets much more powerful.

One important limitation: the CrocEye's MIDI OUT does not provide power to connected MIDI devices; those devices need their own power