ER-301/Sample Scanner

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Applications

  • Quantizate to custom-made scales or grids
  • Wave-shaping
  • Use CV (such as an LFO) to scan a sample as an interpolated look-up table (i.e. the name-sake application).

Description

This unit lets you (flexibly) turn any sample into an interpolating lookup table. If you understand the Bump Scanner, then the Sample Scanner is exactly the same with the (entire) sample taking the place of the bump. The incoming CV selects a position in the sample and the unit outputs the value (or an interpolated value if the position falls between two samples). Most of the complexity of this unit comes from having to locate the entire sample somewhere on the input CV range.

Sample-scanner.png

In the figure above, a sample containing a single cycle of a sine wave has been loaded into the unit. This diagram above is not showing the output signal vs time. The x-axis is not time, but rather the input signal. The diagram shows how the output signal is derived from the input signal. The graph should be read like a lookup table. The center parameter locates the sample in the unit's input range. The width parameter determines how much of the unit's input range is covered by the sample. The height parameter adjusts the amplitude of the sample values, while the fade parameter dictates the percentage of the width used to fade out the sample's edges to zero.

Pitfall.png
Don’t be fooled! This unit is not a wavetable synthesizer. There is no phase accumulator. Instead the input signal is used to directly lookup output values from a lookup table. The lookup table just happens to be loaded from a sample.


Pitfall.png
This unit applies an internal gain of 2.0 to the input signal. For input signals with a range greater than +/-0.5 (or +/- 5V for external signals), you will want to attenuate them with a Linear Bipolar VCA or some other amplification Unit prior to connecting to the Sample Scanner.


Parameters

center

Control Type Has Sub-chain? Sub-chain Parameters Fader Scale
Gain/Bias yes gain (-10 to 10)

bias (-1 to 1)

linear


The center parameter controls where the center of the sample should be placed on the input range.

width

Control Type Has Sub-chain? Sub-chain Parameters Fader Scale
Gain/Bias yes gain (-10 to 10)

bias (0 to 1)

linear


The width parameter controls how much of the input range the sample covers.

height

Control Type Has Sub-chain? Sub-chain Parameters Fader Scale
Gain/Bias yes gain (-10 to 10)

bias (-1 to 1)

linear


The height parameter adjusts the amplitude of the sample values.

fade

Control Type Has Sub-chain? Sub-chain Parameters Fader Scale
Gain/Bias yes gain (-10 to 10)

bias (0 to 1)

linear


The fade parameter dictates the percentage of the width used to fade out the sample's edges to zero.

phase

Control Type Has Sub-chain? Sub-chain Parameters Fader Scale
Gain/Bias yes gain (-10 to 10)

bias (-1 to 1)

linear


The phase parameter rotates the sample within its boundaries with wrap-around.