Bit reduction, Approximation filter, Resampler – D16 Group Drumazon 2 Drum Machine 909 Emulation Plug-In User Manual

Page 21: Images filter, Mixer, Dynamics

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Bit reduction

Dither

- Sets the intensity of the half-bit white noise that is added to the signal just before quantization.

This reduces harmonic distortion that results from the signal’s amplitude degradation by masking the side effects

of quantization.

Bits

- The number of bits the input signal’s amplitude is degraded to, which corresponds to 2^N actual quantiza-

tion levels.

Approximation filter

This is an optional filter to remove partial or complete harmonic content above the resampler’s Nyquist frequency,
controlling the level of aliasing that occurs below the resampling frequency. It removes harmonic content before the
discretization process.

Enable

- Activates / deactivates the filter.

Freq

- Sets the cutoff frequency of the

Approximation Filter

relative to the Nyquist frequency of the resampler,

controlled by these parameters;

0

(the default) - Sets the

Approximation Filter’s

cutoff frequency exactly at the Nyquist frequency

(no offset). This removes all harmonic content above the Nyquist frequency, preventing audible artefacts.

The only occurring artefacts are images (harmonics occurring above the Nyquist).

< 0

(negative offset) - Sets the

Approximation Filter’s

cutoff frequency below the Nyquist frequency.

This removes audible aliasing and part of the original harmonic content below the Nyquist frequency

(proportionally, according to the negative

Freq

offset), as well as some images near the Nyquist.

> 0

(positive offset) - Sets the cutoff frequency above the Nyquist frequency. As a result, aliasing will start

to appear (artefacts below Nyquist frequency) in proportion to the positive

Freq

value.

Resampler

Freq

- Sets the frequency the signal is discretized to (resampled). This parameter ranges from 44 Hz to 44.1 kHz

Jitter

- Controls the intensity of random, short-period clock deviations in the resampler.

Images filter

Images are artefacts that result from resampling a higher sample rate to a lower sample rate. The

Images Filter

removes

some or all of these artefacts from the audio spectrum after the discretization process.

Enable

- Enables the images filter.

Freq

- Sets the cutoff frequency of the

Images Filter

relative to the Nyquist frequency of the resampler.

The higher the value of this parameter, the higher the frequency of harmonics passed to the output

(above the resampler’s Nyquist frequency).

Mixer

FX

– The crossfade between

Dry

and

Wet

signals

Dynamics

This is two effects in one; a typical compressor with a side chain option and an amplitude shaper with an envelope
triggered via

Drumazon’s

instruments.

There are two instances of the effect in the

FX Bus

chains.

21

inteRface oveRview •

The sound conTrol secTion

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