OmniPlex Software

The OmniPlex® Neural Recording Data Acquisition Systems rely on two important software programs: PlexControl, which is the main user interface, and OmniPlex Server, known as the system’s “software engine”. Together, they are referred to as the OmniPlex Software.

**OmniPlex Release 19 now available. Learn More about OmniPlex Release 19**

PlexControl is the powerful online spike sorting software for the OmniPlex System that has a flexible and customizable main user interface. The software represents the next generation in signal visualization and easy-to-use spike waveform classification methods, and allows the researcher to interact with the system. It features easy-to-use signal visualization, spike detection and sorting algorithms. Many spike sorting methods are available including: box, template, line, band sorting in time/voltage space and contour sorting in PCA feature space. A spike waveform snapshot of user-defined size is automatically acquired on each channel by the PlexControl program, and may be viewed at any time to revise spike sorting parameters as necessary. Units can be defined based on either snapshots of the live data or by “drawing” directly on the live data in real time. Each method may be used to sort single electrodes, stereotrodes and tetrodes online.

Continuous spike, field potential and wide-band signals are conveniently displayed in PlexControl’s flexible, customizable user interface along with detected spike waveform segments and their associated two-dimensional (2D) and three-dimensional (3D) feature space clusters for online spike sorting. Additionally, all three data types, as well as thresholded spike waveform segments and digital event data, may be recorded to disk on a per-channel basis.

OmniPlex Server
The OmniPlex Server is the “engine” under PlexControl. It visually displays each of the various hardware devices (e.g., headstages, amplifier) and software modules (e.g., spike and LFP separators, thresholding, sorting) of the system. It acquires data from the OmniPlex chassis and amplifiers, sends commands to those devices, and implements the software digital signal processing (DSP) for OmniPlex’s filtering, spike detection and spike sorting functions. OmniPlex Server is based on a modular, extensible framework – or topology – hardware and software devices, which are interconnected in a dataflow topology that utilizes a topology wizard to enable users to easily define custom configurations without tedious low-level editing.

The OmniPlex Software is compatible with Plexon’s MATLAB® and C/C++ APIs and Client Development Kits (SDKs), and the online NeuroExplorer® link – enabling low latency, closed-loop experiments and online analysis of live data. It can also be further enhanced by Plexon’s PlexNet protocol supporting remote online data access across any TCP/IP or UDP network, and PlexUtil for modifying the OmniPlex Software output .PLX data files. Additionally, flexible digital filtering functionality in OmniPlex is also incorporated in the Offline Sorter program, enabling the user to apply the same filters offline to continuously sampled data as is used online.

OmniPlex Software, arrives pre-loaded on the control computer with the purchase of any OmniPlex System. A demo version of the OmniPlex Software, which can be run without the OmniPlex hardware, is available at the top of this page.

If you have additional questions, a Plexon Sales Engineer would be more than happy to discuss them with you.

FeaturesSpecifications and OptionsRemarks
Recording file formatsPlexon (.PL2, .PLX)
Spike detection methodsVoltage threshold
Spike sorting methods– Manual methods include: template,
line sorting, band sorting, box sorting,
2-D polygon sorting
– Automatic methods include: template,
band sorting, 2-D polygon sorting.
Features available for sorting– Projections onto principal components
– For stereotrode and tetrode data,
per-electrode features
Views available– Wideband continuous
– Spike continuous
– Field potentials
– Spike waveforms
– 2D PCA clusters
– 3D PCA clusters
– Stereotrode and tetrode features
– Spike activity
– Firing rate
– Sorted units
– Peak histogram
NEW 3D spike sample histogram
Electrode supportSingle, stereotrode and tetrodeAcquire and online sorting.
PlatformWindows® 7 and Windows® 10
Activation requirementPlexon version-specific hardware license keyWhen OmniPlex® is ordered, it comes with 2 license keys. Additional keys may be purchased.

Manuals/User Guides

Includes features up to Release 18

Post date April 17, 2017

Installation Packages/Upgrades

Post date June 2020

Change Log

Guides and How To Papers


Post date January 2020

Technical Specs and Data Sheets

Research Articles with Video

*Must use the OmniPlex Windows 10 Migration Guide in order to upgrade to Windows 10

Jacobson, Tara K., Jonathan W. Ho, Brendon W. Kent, Fang-Chi Yang, and Rebecca D. Burwell. “Automated Visual Cognitive Tasks for Recording Neural Activity Using a Floor Projection Maze.” JoVE (Journal of Visualized Experiments) 84 (2014): e51316-e51316.