Orinj Dither

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Orinj version 4.0.0

The Orinj Dither is an effect that introduces low level random noise to the signal to reduce systematic errors – a process known as dithering. Such systematic errors could appear, for example, during the recording quantization when an analog signal is converted into a digital signal. The values of the digital signal are the rounded values of the analog signal, especially when the sampling resolution is lower. If the analog signal is periodic, the same analog values will often be rounded in the same way and the resulting error will be correlated with the signal. Errors due to rounding cannot be removed, but can be made random and not systematic.

Using the Orinj Dither

The Orinj Dither can be added to tracks in the multitrack session view, tracks in the loop building view, and to waves in the single wave view. In the multitrack session view and in the loop building view, first select the track to which you want to add the effect. In all these views, click on Effect, Other, and then on Orinj Dither in the Orinj menu. You will see the following dialog.

The Orinj Dither dialog

When this dialog becomes visible, the Orinj Dither effect has been added. Adjust the parameters of the dither, which are described below, in the dialog above and click Close.

Orinj Dither parameters

See Orinj Effects for an explanation of the Title, Track, Presets, and Bypass controls. The remaining Orinj Dither controls are described below:

  • RPDF: Click on this button to create a dither with a rectangular probability density function. If, for example, the depth of the dither is 2, then the probability of the random dither numbers appearing anywhere between -2 and 2 is the same.
  • TPDF: Click on this button to create a dither with a triangular probability density function. If, for example, the depth of the dither is 2, then there is a higher probability for the random dither numbers to appear in the middle of the interval from -2 to 2 than towards the ends of the interval.
  • Depth: Use this spinner to set the depth of the dither. The depth is the maximum absolute value of the random noise and can be between 1 and 3. (Although dither would rarely be used in 32-bit signals, since the values of the signal in these signals are between -1 and 1, the random dither value depth in 32-bit signals is scaled by 0.000001).
  • Noise shaping: Click on this check to apply noise shaping to the dither random noise. The noise shaping that is used reduces the magnitude of the frequencies between 1 kHz and 5 kHz in the random noise, where the human ear is supposedly most sensitive.

See Orinj Effects for additional notes on: where Orinj effects can be used, applying effects to mono and stereo waves, and using effects during playback. See Orinj Working with effects for additional information on creating, modifying, moving, removing, and processing effects. See Dithering for additional information on the different types of dither effects in audio processing.

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