"There is no default application specified to open the document "dfx Turntablist.component".
Turntablist is an AU (audio unit) effect plug in, and you need an audio unit compatable host application like any of these below to use it..
Logic (version 5.4 or higher)
Spark (version 2.8 or higher)
Metro (version 5.8 or higher)
Rax
SynthTest
Final Cut Pro (version 4.0 or higher)
Final Cut Express (version 2.0 or higher)
Soundtrack
SONASPHERE
AudioXplorer
Ouroboros
Audio Hijack Pro
Melodyne (version 2.0 or higher)
Peak (version 4.0 or higher)
DSP-Quattro (version 1.2 or higher)
Digital Performer (version 4.1 or higher)
Numerology (version 1.2 or higher)
Intuem (version 2.0.1 or higher)
GarageBand
Sample Manager
Plogue Bidule
Amadeus II (version 3.7.2 or higher)
Ableton Live (version 4.0 or higher)
WaveBurner
Critters (version 2.0 or higher)
SonicBirth
AU Lab
Wave Editor
Sound Studio (version 3.0 or higher)
Impromptu
Audacity (version 1.3 or higher)
XO Wave
djay
soundBlade
Toast (version 8.0 or higher)
TwistedWave
AudioCodex
WireTap Studio
Ardour
to install an audio unit component you don't open it, you just copy it to this location 'library/audio/plug-ins/components' ..then open it in the compatable application that you want to use it in!
Hope this helps!?