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Welcome

Introduction to VPixx MATLAB documentation

MATLAB Demo Library

3D Display Demos

Setting up a 3D Display

Digital I/O Demos

Recording digital input from a RESPONSEPixx
Generating digital output
Starting a digital out schedule using a digital input trigger
Creating a digital out TTL trigger with synchronization
Creating a response time game with the RESPONSEPixx
Configuring labels for RESPONSEPixx digital input

Analog I/O Demos

Acquiring data on the analog to digital converter I
Acquiring data on the analog to digital converter II
Basic analog to digital converters
Basic digital to analog converters
Synchronizing with the digital to analog converter
Generating audio with the digital to analog converter
Streaming audio on the digital to analog converter

Audio I/O Demos

Playing audio
Recording and playing back microphone input
Streaming continuous audio
Setting up a microphone feedback loop

DATAPixx Demos

Setting up a gaze-contingent display with a DATAPixx

High Bit Depth Mode Demos

Understanding CLUTs, M16 Mode, and Color Transparency

i1 Demos

Collect data from an i1Pro Spectrophotometer or i1Display Pro Colorimeter

PROPixx Demos

Drawing dots at 480 Hz
Displaying Gabor patches at 480 Hz
Drawing dots at 720 Hz
Drawing dots at 1440 Hz
Drawing dots at 1440 Hz with blending
Drawing dots at 1440 Hz with automatic quadrant assignment
Drawing in 3D using RB3D mode

TOUCHPixx Demos

Creating a touchscreen whac-a-mole with the TOUCHPixx

TRACKPixx /Mini Demos

Recording eye tracking data with the TRACKPixx /Mini
Recording button activity from a RESPONSEPixx and I/O Hub

TRACKPixx3 Demos

Recording and plotting fixation data with the TRACKPixx3
Recording and plotting pursuit data with the TRACKPixx3
Creating a circular gaze-contingent mask with the TRACKPixx3
Recording and plotting eye position data from the TRACKPixx3
Running a free-viewing experiment with the TRACKPixx3
Creating a dynamic gaze follower with the TRACKPixx3
Running a simple saccade to target task with data visualization
Running a simple saccade to target task with analog output of eye position
Calibrating the TRACKPixx3 and TRACKPixx /Mini in MATLAB

VIEWPixx Demos

Using a VIEWPixx as a Tachistoscope

Python Documentation

Introduction to VPixx Python documentation

Python Demo Library

3D Display Demos

A Simple "Hello World" In Stereo

Analog I/O Demos

Generate and record analog output using DAC and ADC schedules

Audio I/O Demos

Play audio on a digital input

Digital I/O Demos

Recording changes in digital-in
How to read button presses from a RESPONSEPixx
Send a digital output trigger on VSync
Using buttonSchedules to automatically pass button activity to digital output
Sending video frame accurate triggers using Pixel Mode
Combining Pixel Mode GB and buttonSchedules
Sending triggers and pulse trains using the digital output schedule

High Bit Depth Mode Demos

Setting up a device in High-bit depth grey-scale mode.

i1 Demos

How to verify the chromacity and luminance of the colors of your device using i1Device

PROPixx Demos

Setting up a PROPixx to display in 480 Hz.
Presenting stimuli at 480Hz
Setting up a PROPixx to display in 1440 Hz
Implement a 10kHz tachistoscope on the PROPixx
Drawing dots at 1440 Hz in Python

TRACKPixx Demos

A simple TRACKPixx3 calibration
A comprehensive TRACKPixx3 calibration
Collect data from the TRACKPixx3

TRACKPixx /Mini Demos

Collect data with TRACKPixx /Mini
Controlling the RESPONSEPixx via the I/O Hub

VIEWPixx Demos

Changing the back-light intensity on a VIEWPixx

pypixxlib Documentation

Getting Started
DATAPixx
DATAPixx2
DATAPixx3
PROPixx
PROPixx Controller
VIEWPixx
VIEWPixx3D
VIEWPixxEEG
Analog In
Analog Out
Audio In
Audio Out
Digital Inputs
Digital Out
DPx Device
Dual Link Out
3D Features
Libdpx Wrapper
Scanning BackLight Features
Video Features
VGA Out
i1Display
TRACKPixx
Shaders
RESPONSEPixx

VPixx Online Classroom and Library

Introductory Topics

The Logic of VPixx Hardware Control

A centralized I/O hub
Register writes and updates
Precision timekeeping with GetTime and markers
Configuring inputs and outputs with schedules
Example: A simple reaction time task

Using VPixx Hardware with PsychoPy

Choosing the Right VIEWPixx

Why replace a CRT monitor?
LCD Technology
Data I/O and synchronization
Side-by-side comparison

Special Features

High-Bit-Depth Video Modes

Introduction to Bit Depth and Colour Lookup Tables (CLUTs)
L48: High Bit Depth Colour and Full Resolution, Limited Colour Space
M16: 16-bit greyscale and limited colour, full resolution
C48: Wide Range, High Bit Depth Colour

Sending and Receiving Analog Signals with VPixx Hardware

Generating two tones using the DAC schedule
Recording an incoming analog signal

Sending Triggers with Pixel Mode

Using Pixel Sync for Stimulus-Accurate Timing

Example: Sending a digital trigger on Pixel Sync
Troubleshooting Pixel Sync

Record Response Times With a RESPONSEPixx Button Box

Construction and functionality of the RESPONSEPixx
Perform basic interactions with your data acquisition device
Record and use a digital input log
Restrict recording to specific button presses and cue participants to valid response choices

Forwarding RESPONSEPixx Button Activity to a Third-Party Receiver

Eye Tracking

Introduction to Eye Tracking with the TRACKPixx3

Principles of TRACKPixx3 operation
The TRACKPixx3 buffer
A simple free viewing task in MATLAB

TRACKPixx3 Calibration Walkthrough

TRACKPixx3 calibration and data collection routine in PsychoPy Builder
TRACKPixx3 calibration and data collection routine in Python IDE
TRACKPixx3 calibration and data collection routine in LabMaestro

Common Eye Tracking Problems and How to Solve Them
Implementing a Real-Time Gaze Follower on the Console
Configuring the TRACKPixx3 Analog Output
Visualizing Gaze Data
Checking if Fixation is Inside a Region of Interest

PROPixx Projection System

Tips for Positioning your Projector and Screen
Adjusting PROPixx Brightness

PROPixx Projection Geometry and System Configuration

Image Dimensions
Rear and Front Projection Screens
Lens Shift

PROPixx High Speed Projection Modes

Real time refresh rates
Quad 4x: 480 Hz colour, half resolution
Grey720: 720Hz greyscale, full resolution
Quad12x: 1440Hz greyscale, half resolution

3D Projection with the PROPixx and 3D Polarizer
Temporal Characteristics of the PROPixx DLP Projector
Rapid Invisible Frequency Tagging (RIFT) using the PROPixx 1440 Hz mode

VIEWPixx /3D

3D Stimulus Presentation with the VIEWPixx /3D
Measuring Pixel Behaviour and Temporal Characteristics of the VIEWPixx /3D

Troubleshooting and Support

What is Pixel Identity Passthrough?
Official Recommendations for Graphics Cards
A Scientist's Guide to Frame Dropping
Diagnosing and Disabling Dithering in the Graphics Pipeline
Diagnosing Display Issues on the PROPixx Projector

Cleaning and Disinfecting VPixx Hardware

Video I/O Hubs
PROPixx Projector
CRT Replacement Monitors
Projection Screens and Mirrors
Eye Trackers
SOUNDPixx Audio System
Other Accessories

Gamma-Correct the Luminance of a Display

Automate luminance measurements and plot the results
Estimate gamma
Generate and apply a gamma-correction CLUT
Using the gamma-correction CLUT in your experiments

VSS Keynote Lectures

VSS2021: Whatever works: Celebrating diversity in brain scaling and evolution
VSS2022: Coordinate frames and shape perception in neural nets
VSS2023: Creating, (Mis)using, and Detecting Deep Fakes

Presentations by VPixx Staff

Advanced vision research paradigms with the PROPixx high refresh rate projector (V-VSS 2020)
High speed eye tracking in vision science: TRACKPixx3 technology and applications (V-VSS 2020)
Timing and synchronization in gaze-contingent displays and latency-sensitive research paradigms (V-VSS 2020)

Hardware Documentation Home

3DPixx IR Emitter and Active Shutter Glasses Kit
3D Polarizer
DATAPixx3 Video I/O Hub
InfraRed Illuminators
Linux Machine
Projection Mirror
Projection Screens
Projector Stand
PROPixx Projector
RESPONSEPixx Button Boxes
SHIELDPixx Shielding Enclosure
SOUNDPixx Pneumatic Sound System
TRACKPixx3 Eye Tracker
TRACKPixx3 /MRI Eye Tracker
TRACKPixx /mini Eye Tracker
VIEWPixx3 /OLED
VIEWPixx LCD Series
X-Rite iDisplay Pro Colorimeter
X-Rite I1Pro3 Spectrophotometer
Hardware Manuals for Discontinued Products

LabMaestro Home

Getting Started with LabMaestro

System Requirements and Runtime Recommendations

Installation and Initial Setup

Full Software Access Permission (Licensing)
Restricted Mode

Introduction to the LabMaestro User Interface

LabMaestro User Interface Actions & Customization
VPixx Pack&Go Integration
Undo/Redo in LabMaestro
Customize Components from the Timeline Preview

LabMaestro Projects Files (*.lm)

Environment

Displays

Spatial Unit Type

Supported VPixx Devices

Starting Test Patterns on VPixx Devices

Adding VPixx Hardware to a project

Simulating Hardware

Resources

Experiment Design

Methods

Constant Stimuli (Condition List)

Staircase Method

Staircase Demonstration

Timelines

Epochs

Flow Control Within Timelines

EnterCondition and ExitCondition
Controlling Experiment Flow with Enter and Exit Conditions Template Project

Timeline Properties
Timeline Debugging

Recordings and Built-In Data Visualization
Data Export
LabMaestro Settings
Gamma Calibration

Components

Regions
Patterns
Commands

Values and Expressions

Custom Expression Editor

LabMaestro Project Templates, Tutorials, and Demos

Static Psychophysics Stimuli
Calibration with TRACKPixx3
Regions and Patterns for Rendering Visual Stimuli
Monitor Pixel Density and Degrees of Visual Angle
Drag & Drop Regions
Generating Rapid Invisible Frequency Tagging (RIFT) stimuli for the PROPixx in LabMaestro
High Bit Depth Rendering with VPixx Devices
High Refresh Rate Rendering with VPixx Devices
Free Viewing Experiment
Customizing Stimuli with Mathematical Functions and Expressions

Best Practice Tips
Troubleshooting Tips
Using the TRACKPixx3 within LabMaestro
Using the PROPixx within LabMaestro
Visual Stimuli Rending in LabMaestro
Colors in LabMaestro
X-Rite Measurement Tools
LabMaestro Component Library
Export Device Requirements as Code

LabMaestro Hardware Simulator Home

Licensing
Creating a New Device
Introduction to the Graphical User Interface

Digital Inputs

Accessory Configuration
Digital Pulse/MR Trigger

Digital Outputs

Pixel Mode

Analog Inputs and Outputs

Analog Output (DAC)
Analog Input (ADC) and Waveform Generator

Audio
Eye Tracking

Differences Between Real and Simulated Devices

Register/Memory/Clock/Timetag
Schedules
"Video" and Refresh Rate
VSync/PSync Synchronization
Loopback

Integration with API

LabMaestro Pack&Go

Getting Started with LabMaestro Pack&Go

Create an account and add credits
Uploading your experiment to Pack&Go
Testing an uploaded experiment before publishing
Publishing the experiment and downloading results

Integration of Prolific with LabMaestro Pack&Go
The Contents of the Session Results Folder
Troubleshooting Pack&Go studies
Best Practices for Designing and Implementing Pack&Go Studies
Pricing Information and Credit Calculator
Glossary
Setting Alternate Return Paths Using Pack&Go
Pack&Go API

Software Download & Information

Performing Firmware Updates
API/SDK Availabilities
Software Revision Log

Frequently Asked Questions

Sales and Ordering

Hardware

PROPixx
VIEWPixx /EEG, VIEWPixx, VIEWPixx /3D
RESPONSEPixx

Software

Troubleshooting

MATLAB/Psychtoolbox
Python
Configuring Linux for Multiple Displays

[VPixx Main Site]
[Scientist Portal Access]

Main

Introduction to VPixx MATLAB documentation

MATLAB Demo Library

3D Display Demos

Setting up a 3D Display

Digital I/O Demos

Recording digital input from a RESPONSEPixx
Generating digital output
Starting a digital out schedule using a digital input trigger
Creating a digital out TTL trigger with synchronization
Creating a response time game with the RESPONSEPixx
Configuring labels for RESPONSEPixx digital input

Analog I/O Demos

Acquiring data on the analog to digital converter I
Acquiring data on the analog to digital converter II
Basic analog to digital converters
Basic digital to analog converters
Synchronizing with the digital to analog converter
Generating audio with the digital to analog converter
Streaming audio on the digital to analog converter

Audio I/O Demos

Playing audio
Recording and playing back microphone input
Streaming continuous audio
Setting up a microphone feedback loop

DATAPixx Demos

Setting up a gaze-contingent display with a DATAPixx

High Bit Depth Mode Demos

Understanding CLUTs, M16 Mode, and Color Transparency

i1 Demos

Collect data from an i1Pro Spectrophotometer or i1Display Pro Colorimeter

PROPixx Demos

Drawing dots at 480 Hz
Displaying Gabor patches at 480 Hz
Drawing dots at 720 Hz
Drawing dots at 1440 Hz
Drawing dots at 1440 Hz with blending
Drawing dots at 1440 Hz with automatic quadrant assignment
Drawing in 3D using RB3D mode

TOUCHPixx Demos

Creating a touchscreen whac-a-mole with the TOUCHPixx

TRACKPixx /Mini Demos

Recording eye tracking data with the TRACKPixx /Mini
Recording button activity from a RESPONSEPixx and I/O Hub

TRACKPixx3 Demos

Recording and plotting fixation data with the TRACKPixx3
Recording and plotting pursuit data with the TRACKPixx3
Creating a circular gaze-contingent mask with the TRACKPixx3
Recording and plotting eye position data from the TRACKPixx3
Running a free-viewing experiment with the TRACKPixx3
Creating a dynamic gaze follower with the TRACKPixx3
Running a simple saccade to target task with data visualization
Running a simple saccade to target task with analog output of eye position
Calibrating the TRACKPixx3 and TRACKPixx /Mini in MATLAB

VIEWPixx Demos

Using a VIEWPixx as a Tachistoscope

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Streaming continuous audio
Setting up a microphone feedback loop

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