# Synchronization failure only when external USB device connected

**URL:** <https://psychtoolbox.discourse.group/t/synchronization-failure-only-when-external-usb-device-connected/4260>\
**Category:** Hardware\
**Tags:** windows, linux, io, gpu\
**Created:** [February 21, 2022, 5:27pm UTC](https://psychtoolbox.discourse.group/t/synchronization-failure-only-when-external-usb-device-connected/4260 "2022-02-21T17:27:32Z")\
**Posts on this page:** 1\
**Showing post:** 15

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**Author:** ![Ian-Max-Andolina](https://yyz2.discourse-cdn.com/free1/user_avatar/psychtoolbox.discourse.group/ian-max-andolina/32/4_2.png) [@Ian-Max-Andolina](https://psychtoolbox.discourse.group/u/Ian-Max-Andolina)\
**Post date:** [February 24, 2022, 11:06pm UTC](https://psychtoolbox.discourse.group/t/synchronization-failure-only-when-external-usb-device-connected/4260/15 "2022-02-24T23:06:16Z")

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> [@aladdin](#):
>
> Great, thanks for the note. I am also interfacing with a Tobii eye tracker which I’m not sure if if works with Octave, but I’ll double check.

I also use Tobii Pro eyetrackers, and you should strongly consider using the Titta toolbox which builds on the SDK providing a metric ton of improvements:

> [@Toolboxes for Tobii and SMI eye trackers](https://psychtoolbox.discourse.group/t/toolboxes-for-tobii-and-smi-eye-trackers/105):
>
> Hi All, Me an my colleague Marcus Nyström have written MATLAB/PsychToolbox and Python/PsychoPy toolboxes for using SMI and Tobii eye trackers. For PsychToolbox, have a look here: - [https://github.com/dcnieho/Titta](https://github.com/dcnieho/Titta): Tobii toolbox supporting MATLAB and Octave on Windows and Linux - [https://github.com/dcnieho/SMITE](https://github.com/dcnieho/SMITE): SMI toolbox, Windows and MATLAB only (as SMI SDK is windows only). The respective Python/PsychoPy links are: [https://github.com/marcus-nystrom/Titta](https://github.com/marcus-nystrom/Titta) and [https://github.com/marcus-ny…](https://github.com/marcus-nystrom/SMITE)

> **[GitHub - dcnieho/Titta: Matlab and PsychToolbox interface to Tobii eye...](https://github.com/dcnieho/Titta)**
>
> Matlab and PsychToolbox interface to Tobii eye trackers using Tobii Pro SDK - GitHub - dcnieho/Titta: Matlab and PsychToolbox interface to Tobii eye trackers using Tobii Pro SDK

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