Consider a real drum kit. When you hit a single drum, sound is also reproduced in the nearby drums. You are going to learn how to make this effect from a sampled drum kit,  using a drum trigger and mixing in modified samples. To illustrate the effect listen to these two sound clips.

The original drum beat:

The drum beat enhanced with resonance:

In the example three drums are enhanced. Kick, snare and tomb.

That is done by creating their corresponding resonance samples composed of five low attack samples of the drum kit. Kick, snare, tomb, cymbal 1 and cymbal 2.

The waveforms displays the low volume of the samples. In a multisampled kit the low attack samples can be found being used at low velocities.

Creating the resonance samples
Put together the low attack samples and do leveling and panning. Also delay the samples individually. If you want to think in therms of a real drum kit, this would reflect the microphone placement. The further away from the mic, the more delayed.

- Kick

The kick resonance sample consists of low attack samples: snare, tomb, cymbal 1, cymbal 2. Mixdown as sample1.wav

- Snare

The snare resonance sample consists of low attack samples: kick, tomb, cymbal 1, cymbal 2. Mixdown as sample2.wav

- Tomb

The tomb resonance sample consists of low attack samples: kick, snare, cymbal 1, cymbal 2. Mixdown as sample3.wav

Trigger and mix with original samples
Now if you have a drum beat with at least kick, snare and tomb on separate tracks you can use the LADSPA Trigger to apply the resonance. But first you have to add the resonance samples to the trigger. Replace sample1.wav, sample2.wav, sample3.wav with the ones you’ve created. The path is: /usr/share/ladspa/samples/.

Insert the trigger to each track and step up the sample number to select the correct resonance sample. Then adjust the amount of saturation.

Contribute
If you make your own resonance samples it wold be nice if you share them with us. I see this as an effect, not just a way of making realistic drums. So go ahead and use your imagination.

If you want to get your Hydrogen drum tracks into Ardour, one way of doing it is to record the Hydrogen outputs. You can use either the stereo output or the track specific outputs. This example uses a stereo sampled drum kit that is exported into Ardour as mono track(s). This is done by using the left outputs and panning the channels fully to the left.

Recording individual outputs to separate tracks

Ardour inputs are connected to track specific outputs (track_out_1_kick, track_out_2_snare, track_out_8_crash). Each output is recorded on a separate mono track.

Recording several outputs to one track

Ardour input is connected to track specific outputs (track_out_2_snare, track _out_4_snare, track _out_5_snare). Each output is recorded on the same mono track.

Recording master output allowing volume adjustment

Ardour input is connected to master output (out_1). Output is recorded on the same mono track. By using the master output it’s possible to adjust the output volume. You can use solo (s) to export a single track or mute (m) for several.