dtblkfx Darrell Barrell

DtBlkFx by Darrell Barrell

DtBlkFx is a Fast-Fourier-Transform (FFT) spectral processing plug-in.


Precision parametric equalizing with sharp-roll off:

  • Set the frequencies so accurately that you can adjust individual harmonics of a sound.
  • Frequency resolutions of up to 0.7 Hz.

Harmonic based (or comb) filtering:

  • Set a fundamental frequency and adjust the level of it and its harmonics – you can even remove the pitched component of a voice.
  • Active harmonic tracking – let DtBlkFx automatically track a sound and adjust the level of its harmonics.

Various types of noise control:

  • Change the “contrast” between loud and soft frequency components.
  • Adjust only those frequencies below or above a particular threshold.
  • Clip frequencies above a particular threshold.
  • Sound smearing (phase randomizing).

Frequency shifting:

  • Harmonic shifting by a fixed number of notes.
  • Non-harmonic shifting by a fixed frequency.
  • Active harmonic repitch – the content of your sound is monitored and re-pitched to a destination note.


  • Standard (frequency enveloping) – make your trumpet rap, string section sing or synthesizer talk.
  • Harmonic based – harmonics in one channel are power-matched to those in the other (or some predefined waveforms) for a new vocoding sound.

Frequency masking:

  • A harmonic or threshold mask may be set for any effect (apart from vocoding) – for example only shift frequencies that are below the threshold.

Realtime spectrogram (waterfall) display of input and output sounds:

  • See what frequency components are in your sound and exactly what you’ve done.
  • Use your mouse to see the note & frequency under the pointer.

You can select up to 4 of the above effects to be run in series – combining the effects in this way allows you to make completely new and surprising sounds.

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