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PLUM AUDIO –

ARBA

OPERATING PRINCIPLES:

In this part of the manual you will find a few examples of patches that can be done with

ARBA

and

demonstrations of various aspects of its operating principles, please take your time and try out these

patches for a better understanding of the

ARBA

EXAMPLE 1 - QUAD MONO VCA:

The most basic usage of

ARBA

is as a quad mono VCA.

Use one channel to control the level of one mono source.

Connect the output of the source (oscillator, filter or any other audio source) to the input of this

channel, connect the CV source (an envelope generator, LFO or any other CV source) to the CV

input and connect the output of this channel to your listening path (a mixer or any other audio

interface).

When the CV level rises, the level of this channel will increase.

ARBA

provides four identical channels that can process four mono audio sources.

Содержание ARBA

Страница 1: ...Variable sensitivity Unlike most VCA s in Eurorack that clip easily due to the 5V unity gain the cause of this annoying clipping is that many envelope generators output a standard voltage of 8V with...

Страница 2: ...wer bus board The red stripe of the ribbon cable 12V side must be oriented to the same side as the red stripe marking on the header Use the four screws supplied to mount ARBA to a free 18HP space in t...

Страница 3: ...age of ARBA is as a quad mono VCA Use one channel to control the level of one mono source Connect the output of the source oscillator filter or any other audio source to the input of this channel conn...

Страница 4: ...one CV for two or more channels In the following example ARBA is divided into two sections each of which functions as a stereo VCA The first stereo VCA including channels 1 and 2 CV input of channel...

Страница 5: ...ed at the next connected output In this example only the output of channel 4 is used This output sums together the outputs signals of channels 1 2 3 and 4 In this configuration you can also use ARBA a...

Страница 6: ...channel 1 is connected This input is shared with the inputs of channels 2 3 and 4 You can connect outputs 1 4 to different paths and use different CV generators to create cool rhythm sequences BOOSTI...

Страница 7: ...hard clipping of ARBA is about 23 2V peak to peak 11 6V Be careful ARBA can produce high gains EXAMPLE 5 BOOSTING Connect the audio signal to the input of channel 1 and your envelope signal to the CV...

Страница 8: ...of channel 4 and connect it to your listening path Use the CV input of channel 2 to control the amount of distortion When the CV signal on this input is 0V the output is clean Any CV above 0V will inc...

Страница 9: ...low the calibration procedure CALIBRATION PROCEDURE First you need to choose what amount of CV will cause unity gain unity gain is the point when the input gain and output gain are equal For super cle...