T.J.Hooker...
The triggers are ones you can buy (very expensive usually) or the ones you can make for yourself with a quick trip to Radio Shack and about $20!
Purchase their little Piezo tweeter dealy. It is a buzzer thing that is used on doors in businesses, etc....You have heard them before I am sure.
But that little speaker makes one hell of a microphone! Of course microphones and speakers are essentially the same thing and a speaker can be used as a microphone (I great story I have for that, I may even share it one day...
![Smilie :) :)](/images/smilies/smile.gif)
). Anyway....
The Piezo has three wires coming off of it. Red, Black, Blue. Cut the blue wire, it is not needed.
Now, you also purchased a regular old 1/4" connector, a TS (tip sleeve) not TRS (tip ring sleeve, or stereo connector). It is the connector on a guitar cable.
Now, solder Red to tip, and Black to sleeve. Presto! You now have a trigger. Yes, if you have a midi device like a D-4 that accepts 1/4" input sources, you can use this trigger and any surface to produce the signal to excite a sound in the tone module....
Plug that bad boy into the Key input of the gate (like said above by jamiecer....) and attach the trigger to the top head of the drum in question. Make sure to do it at the edge of the drum!!!
Now, you may have to use some two sided tape to keep her on there. Buy the EXPENSIVE, BEST double sided tape you can find, because if that trigger is on a floor tom that is tuned to resonate, that head vibration is going to pop that trigger right off the head during the drummers best take of a song! It never fails. And without that trigger on there, the tom signal is never going to make it to tape.
Anyway. Once you have it affixed to the drum head, the way to set the trigger is as follows.
Hit every other drum on the kit and adjust the Threshold of the gate until none of them will trigger the gate. Yes, even with triggers other drums can produce enough vibration on the said drum head to open the gate, so you must still carefully set the Threshold. Now, once no other drums are triggering the gate on said trigger, very lightly tap the drum in question. The gate should open to the slightest hit! If it doesn't, hit it just a hair harder. You may need to play a bit with the Threshold to get everything working well. If the drummer hits hard, then don't worry if the gate don't open with he hits the drum really lightly because as long as it opens with his "average" hit, you are in the game. But, you should still set the lowest threshold setting possible to assure that every time the drummer hits that drum that the gate opens via the trigger, but, that other drums do not open the gate via that trigger.
Make sure that you set longer then you think you may need Hold and Release times on the gate. With snares, you will want the "ping" of the snare to get to tape. On toms, you want a full resonance.
Actually though, John has the best idea for gating, using mute automation if you have it. This is much more reliable, and can be edited whenever you want. Also, it assures that you get the full drum sound to tape, and you are just gating during mix down.
There are countless (okay, maybe 4 or 5) other ways to simulate a noisegate at mix down time. These can include editing your tracks in a DAW and removing back ground noises between tom hits, and applying a fade out to the tom hit, to actually transferring the tom tracks to another track but only when they actually hit. I have has cases where the tom hits were so inconsistent that they needed constant level adjustment, so a gate would not work. Basically, I just run the tom tracks back into the console, and feed to console to new tracks, and adjust the volume of each hit one by one. I of course only engage record right before the tom hit (tricky to do) and disengage it after the hit has resonated. I must say that this is a last ditch thing to do, and I only use it when the tom tracks are just really horrible (I get stuff that was tracked at other studios and it isn't always pretty....
![Smilie :) :)](/images/smilies/smile.gif)
). This is a very time consuming thing to do. Takes about 1-2 hours per song for three tracks of toms.
Anyway, trigger are sometimes appropriate during tracking, but mostly, you probably shouldn't use them. I think that if you play with your mic placement, and are using good mics and preamps, and have good monitors, you will find that in most cases the wide open drum sound is more pleasing to the ear.
Good luck.
Ed