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Noise gate external key

A post by David Mellor
Saturday March 01, 2003
The use of the external key (trigger) facility of the noise gate.
Noise gate external key

Suppose you have taken every care over the setting of the threshold, but the gate still isn't opening and closing reliably on the snare drum.

What next?

The answer is to use an external key signal to open the gate. Here's the scenario:

  • Feed the signal from the regular mic through the gate as normal.
  • Tape a contact mic to the shell of the snare drum.
  • Feed it via a preamp to the external key input of the gate.
  • Switch the gate to external key ('EXT').
  • Set the threshold etc. for reliable triggering.

Now, the gate is triggered by a signal that picks up virtually no external sound - only the sound of the drum.

What's more, the signal from the contact mic comes maybe half a millisecond earlier than the signal from the regular mic, which allows the gate to open a little in advance so that the transient of the drum is accurately captured.

It has to be said that this is probably an over-elaborate technique for most circumstances. But it works very reliably and is worth knowing about for the occasional difficult situation.

A post by David Mellor
Saturday March 01, 2003 ARCHIVE
David Mellor has been creating music and recording in professional and home studios for more than 30 years. This website is all about learning how to improve and have more fun with music and recording. If you enjoy creating music and recording it, then you're definitely in the right place :-)