Mid Side

ARREL Audio ER-130 Eurorack Voltage Controlled MID SIDE (M/S) Unit is the answer to all stream creative needs for EURORACK synthesizers. Its features set it apart from other similar products on the market due to a very high fidelity approach used for the design of the electronics together with the use of high quality components. The internal circuits of the ER-130 have been directly derived from the ARREL Audio professional units in order to obtain maximum sonic performances.

MID/SIDE processing is based on the coding of a stereo signal into two components. The “MID” channel contains the information that appears in both the left and right channels (monophonic content), and the “SIDE" channel contains all the information that differs between the left and right channels (stereophonic content).

Once encoded into M/S, these two signals can be “creatively” processed independently, before being decoded back into the L and R channels. The M/S technique gives control over the width of the stereo image. In addition the ER-130 provides insert points on the MID and SIDE channels for the insertion od Voltage controlled Eurorack units for the maximum "creativity".

On top of its amazing sound quality, the ER-130 MS unit features a unique set of functions.

Manual (zero detent) and CV (Control Voltage mode) switch, the control Voltage range [0V, +5V]) but it can accept up 0 +12 V (attenuation control)
High quality analog M/S Matrix
Unbalanced in/out
By-pass push button
LO-CUT filter on the SIDE
Inserts on MID SIDE channels with on off switch
Multicolor stereo depth display
Peak indicator (Out signal and CV)


  • 80 mA +12V
  • 60 mA -12V
  • 0 mA 5V
  • 40 mm deep

This Module is discontinued.

$539 Price in € submitted Nov 22nd 2016, 21:21 by virusvoice | last Change Oct 25th 2019, 15:59 by ezra

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