Dvs Mode
The goal of this mode would allow people to easily use Mixxx with external mixers and vinyl control, disabling unneeded internal processing for better responsiveness.
Add a "DVS mode" checkbox to the Options menu that makes the following changes:
- Enables vinyl control, obviously
- Routes deck outputs to separate selectable sound card outputs (in prefs->DVS mode)
- Disables gain, EQ, channel faders, cross fader, play, cue, pitch, master output MixxxControls and all associated processing
- Grays out/hides applicable GUI controls (or just suggests changing the skin)
- Leaves LADSPA enabled on a per-deck basis
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