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English Tear Model HM2401

Industrial Music Electronics English Tear Model HM2401
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Description

The English Tear is a eurorack-format voltage conditioning module specially designed to interface with the Korg MS series of synthesizers. The systems differ in trigger polarity and frequency control law: the MS series using a "hertz per volt" scheme and the eurorack with "volt per octave" scaling. This module enables convenient two-way patching between the two systems with a minimum of user adjustment required.

Easy conversion from exponential volt-per-octave to linear hertz-per-volt and back, as well as V-trigger to S-trigger conversion. Jack normalling fixes the voltage processors to these converter circuits, so you may scale the input voltages as desired. The log/expo converter ciruits also have many other uses in your modular system beyond the conversion of pitched voltages.

Features additional offset trimmers for setting the base frequency of each circuit (and easier calibration as a result), as well as 2X gain on the positive end of Processor B.

Five Sections are Present

Scale & Invert Two voltage processors to scale and invert an incoming signal, with optional offset. The output of each section is normaled to one of the nonlinear amplifiers described below. The first processor circuit features a second, unattenuated input for simple voltage mixing.

CV to Hz/V An exponential amplifier for receiving a eurorack pitch control voltage and converting to korg's hertz-per-volt scale.

Hz/V to CV A logarithmic amplifier for taking the ms-20's keyboard voltage and scaling it to suitably control eurorack oscillators such as the Hertz Donut mk II.

Trigger/Gate Polarity Inversion A pair of simple trigger converter circuits, for inverting the polarity of trigger or gate signals. This allows transient events from each system to properly trigger the envelopes of the other.

CV Manipulation & Processing In addition to the stated application of korg ms voltage scaling, the English Tear has significant in-system utility in instruments of all sizes. The voltage processors provide additional scaling and mixing opportunities to cv inputs with limited controls, and the large offset generator knobs enable manual performance of a dc output voltage. Multiple units may be patched together to enable analog computation functions uncommon in musical instruments.

Specifications
Voltage processors: -1 to +1x multiplication
Nonlinear amplifiers: 3.5 octaves output range.

Discussions

The Modular Thread 2016

Are there any modules out there that support hz/volt natively, without converters such as English Tear?

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you know you're not really a modular person...

Truth doesnt hurt...after all the squabbling in here it was just meant to be a lighthearted comment. Id actually forgotten what way round my English Tear plugged in but whatever... :)

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Behringer 2600

...a user of the MS for as long as i care to remember this faff is why things like the English tear etc became popular, it is better to use them to translate to v/oct and vice versa than lose precious patching on the ms line

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