MIDI

Audio to MIDI Triggering of Drum (2)

The Music Telegraph | Text 2019/06/12 [12:49]
MIDI

Audio to MIDI Triggering of Drum (2)

The Music Telegraph| 입력 : 2019/06/12 [12:49]

▲ Converting Drum Trigger Audio to MIDI

 

 

Audio to MIDI Triggering of Drum (1) 

 

 

Other Critical Factors

The CV (Control Voltage) to MIDI conversion must be fast and inaudible or the resulting trigger delay will cause minor but critical time delays that mess up the time feel or groove by causing"Flams". (Trigger delay is the time in milli seconds that it takes the device's computer to actually convert  CV to a MIDI note "On" command.) Again, less than 7 ms is considered OK but the faster the better. All the latest devices, samplers, etc., that provide this feature are fast enough to avoid unacceptable trigger delay.

 

Many units that provide CV to MIDI conversion do not do dynamics as part of the conversion however, direct MIDI triggering (Using any MIDI control keyboard, drum pad, etc.) does provide for dynamics. And in many cases, direct MIDI triggering using layered samples, provides for variations in tone as well.

 

The CV to MIDI process only converts CV to a MIDI note "On" command without regard to thedynamics or tone of the source. That's why this technique works best on kick drum and snare drum where the drummer plays a relatively stable, consistent simple, solid beat or groove that isnot excessively syncopated, dynamic or complex. Elaborate, dynamic, syncopated drum parts may trigger well technically (fast) but sound stiff or otherwise unmusical due to the lack of dynamics and tonal variations that are interpolated in the triggering process.

 

Remember: When a drum is hit hard or soft, two changes take place. There is a change in amplitude (volume) and there is a change in tone as well. For example, a soft hit on a snare drum has a different tone than a hard hit. In order to trigger with total realism you will need a device that interpolates changes in dynamics and has a variety of multi layered samples to accommodate the variations in tone. 

 

Also a drum sounds very different depending on where on the head it is struck and what it is struck with (sticks, brushes, wood or felt beater etc.). You can see how elaborate this can get.

 

 

Triggering Is A Very Useful Tool

When used carefully and appropriately, triggering is a major part of today's mixing techniques and can be of tremendous value in saving an otherwise good drum performance. 

 

 

 

 

 

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