I've been itching to play around with EQ FX isolation after seeing the
DJTT article and
one of Stewe's great mappings. One thing I wanted to avoid, though, was the use of any modifier states to achieve EQ isolation. My setup is is X1 + Z1 + MF3D, and it's great to be able to use a single non-native mapping without worrying about modifiers/etc clashing.
After poking around a bit, I came up with two techniques. Both eat up the 3rd and 4th decks, so this still isn't a very good solution if you're mixing with 4 decks, remix decks, live input decks, etc.
Simple EQ Isolation
The first technique is a super simple method that uses four buttons per deck: Reset, High, Mid, Low. Each button sets all three EQ kills across both matched decks. I copy deck A->C and B->D on a bunch of inputs to maintain sync for each pair of decks. The risk with this mapping is losing sync with EQ still split between decks.
http://www.youtube.com/watch?v=thxVcs1hjBk
Advanced EQ Isolation
The second technique allows for individual EQ band selection (instead of a single toggle, you can put any combination of high/mid/low on Deck A, with Deck C always opposite). It also automatically maintains sync by watching beat phase and seek position; if anything drifts it re-copies the shadow deck.
To do this, I'm using the scripting capabilities in
Lemur and having Lemur fire notes back to its Traktor mapping. I only picked Lemur up the other day, so I'm sure there's a more elegant solution than the one in the video, but I really love it so far.
http://www.youtube.com/watch?v=xgsCO5GENxs
Lemur is a paid piece of iOS software (currently $25 on holiday sale), and I'm actually using a wired connection with an
iConnectMIDI2+ to stay away from wifi issues (it's an $80 device, but provides a TON of MIDI/audio routing capabilities).