back in 2009, the d-fuser was conceived to mix ‘triplehead’ dvi. it was a direct need for d-fuse’s live shows, along with HD. that story is long told.

then in 2011, the datapath X4 was released. it’s a triplehead2go on steroids, coming from the pro-av market rather than gamers. still, surprisingly affordable for what you get, which is a 1-in, 4-out dual-link dvi box where each output is completely configurable. before even getting to running quad-head, you could take triplehead input, split that to three outputs, and then use the forth to scale that non-standard 12x3 input back to something you could display on a monitor on your desk. i like, a lot1.

it was a while until we got our hands on one at d-fuse HQ, but we did, and

*spark d-fuser, meet datapath x4. quite the upgrade from a triplehead2go.

— toby*spark (@tobyspark) December 10, 2013 %22%3EDecember%2010,%202013%3C/a%3E%3C/blockquote%3E%0A%3Cscript%20async%20src=%22//">now the d-fuser can work with one too. of course, this has all happened since the firmware was commissioned and plans went to the factory, so the retail units don’t ship with this support. having just stepped through the process for the guildhall school of music and drama’s purchase of two d-fusers and an X4 for their scenography work2, i’ve packaged up and made good the resources necessary. it’s not quite ready for yet — it involves a windows pc, amongst other things — but the process works, and i’ve even got a nice align grid and 4x1 to 2x2 pixel map and test movie rolled in there.

so - attached is a zip of files with the resources you need to configure 2048x1536@30Hz through your d-fuser and 2048x1536@30Hz to 4x 1024x768@60Hz through the X4.
  Align Grids
    SPK Align 2048x1536.png
    SPK Align 4096x768.png
  D-Fuser Controller Setup
    _See support site for firmware v30 and above_
  D-Fuser Processor Setup
    Windows CorioTools SPK-DF-750 v423 with
  Datapath X4 Setup
    spark dfuser - datapath X4 configure script
  Pixel Map
    Spark D-Fuser X4 4x1 to 2x2 Pixel Map.qtz
    SPK Align 4096x768 30fps 

i didn’t see many config scripts for the X4 when i wrote my first, so here’s the configure script from the zip in plain, google-searchable, text.


echo '### Datapath X4 Configuration for *spark d-fuser'
echo '###'
echo '###'

if [ ! -x '/usr/local/bin/vqscmd' ]
  echo 'Error: Missing Mac OSX software for X4'
  echo '       Download and install from'

echo 'Setting input format to 2048x1536 30Hz'
/usr/local/bin/vqscmd -DeviceNumber=0 -InputEdid=1,2048,1536,30000

echo 'Setting output format to 2x2 grid of 1024x768 60Hz'
/usr/local/bin/vqscmd -DeviceNumber=0 -OutputMode=1,1024,768,60000,1
/usr/local/bin/vqscmd -DeviceNumber=0 -OutputSource=1
/usr/local/bin/vqscmd -DeviceNumber=0 -CaptureRegionDefault=0

echo 'Saving settings in X4'
/usr/local/bin/vqscmd -DeviceNumber=0 -Commit


  1. its noisy fan and bulky power supply, less so. 

  2. first use of which was this: [a bright spring day spent in a dark concrete cellar…](

    “>March 23, 2014