First thank you #LFE06 for the talkback button.
For the ones that want to have the knob triggered by midi device like if using a real talk box button. By this I mean you have to push the button and hold when you are talking and real ease it to cut talkback
here are the steps , its simple as this.
In the environment
- select the Talkback layer
-clic new/physical input
-click new /faders/specials/bang 2nd fader
-click new / monitor
-link the midi device you want to use as talkback button to monitor, push the button to show its midi message
-link monitor to the bang 2nd fader
- let the bang 2nd fader instrument values as they are
- select the talkback text fader : set input to the value of your midi message ( note, program change ...) in my case its a note, then set the values as with the data byte 1 of your monitor ( third row) in my case E7.
-link the bang 2nd fader to the talkback fader.
-if the midi controller you are using is a fader , knob or foot expression pedal, you can stop here its will work as long as you push the controller all the way up or down ( data byte 2 needs to be 0 or 127 to trigger bang 2nd fader object.
if using a launchpad like dj's use oftenly, theire are chances you are all set! since their is no scaled velocity other that 1/ pushing hits 127 and 2/ releasing falls down to 0.
-if using keyboard keys since I have not yet found a way to dissociate the note on and off of incoming message just inside logic environment , I would have to dig a bit deeper.... but not just now, my girlfriend is waiting for me and I have crossed the boundaries of her patience gauge with this reply. if I see people interested in using keyboard key without assigning more than one key, I will try to work out a way to accomplish this. Maybe not using the meta 99 aka bang fader .
now press the note and it triggers
Anji - Logic pro 10.0.7/ OSX 10.9.3/ Mac Pro 6 cores intel xeon 12gb Ram Apollo quad audio interface