Brain Imaging & Analysis Center

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====== HDMI Vide
o Switcher ======

[[https://www.monoprice.com/product?p_id=39665|Blackbird 4K HDMI Matrix]]
{{:biac:experimentalcontrol:39665_Manual_191115.pdf|Blackbird Manual}}

Web Gui connection from Tech iMac at each scanner:
[[http://10.0.1.229|http://10.0.1.229]]

The video **AND** audio connections between the input ( computers, DVD, etc ) and output ( monitors, projector, TV, headphones ) at each scanner pass through a software-controllable video switching box. The box is located in the rack that contains the 2 stimulus control PC's in the scanner equipment room.

The video switching box only connects the audio/video signals. The keyboard and mouse devices on the console desk are connected directly to their respective computers and cannot be changed. This means you will probably find it hard to work if you connect monitor 1 to CPU 2 (or vice-versa) because the keyboards and mice will be linked to the wrong screens.

The monitors contain integrated speakers and there is an HDMI audio extraction device connected to the subject's headphones as input.  This means that the audio signal to the subject is just another connection controlled by the switching software and the audio toggle switch no longer exists.  If you send INPUT1 to OUTPUTA, both audio and video from the stimulus presentation computer are sent.  So send audio/sound from the primary stimulus presentation computer to the console room and the subject, send INPUT1 to Left Screen, Projector and Headphones.

{{ :biac:experimentalcontrol:blackbird_general.png?direct&600 |}}

Currently the only ways to control the video switcher are: 
  * through a web GUI from the iMac ( connect to 10.0.1.229 at both scanners )
  * the small blackbird remote ( press the output you want to change, THEN the input you want to send )
  * the buttons on the switcher itself


To control the switcher from the web interface:
  * open [[http://10.0.1.229|http://10.0.1.229]]
  * Click "Status" to show existing connections
  * Go to "Matrix" to get to the switching interface
  * each Output and their current Input will be shown
  * hover over the IN# to change which input will be sent
  * select the appropriate IN# to go to the output destination you are changing 

{{ :biac:experimentalcontrol:blackbird_matrix.png?direct&600 |}}



The current connections at BIAC6 are:

^ Inputs  ^ Outputs ^
| In1 : CPU1 Primary   | OutA : Left Screen  |
| In2 : CPU1 Secondary | OutB : Middle Screen  |
| In3 : CPU2           | OutC : Right Screen  |
| In4 : Blu-Ray        | OutD : Projector  |
| In5 : Extra Console Input     | OutE : Headphones  |
| In6 : Eyelink        | OutF : 3D LCD  |
| In7 :                | OutG : Secondary Headphone  |
| In8 :                | OutH :    |


The current connections at BIAC5 are:

^ Inputs  ^ Outputs ^
| In1 : CPU1 Primary   | OutA : Left Screen  |
| In2 : CPU1 Secondary | OutB : Middle Screen  |
| In3 : CPU2           | OutC : Right Screen  |
| In4 : Blu-Ray        | OutD : Projector  |
| In5 : Extra Console Input     | OutE : Headphones  |
| In6 :                | OutF :   |
| In7 :                | OutG :   |
| In8 :                | OutH :   |


Labeled Graphic of input/outputs:

{{ :biac:experimentalcontrol:new_switcher_setup.png?800 |}}
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