Intellijel

Notes: Att 1U Passive Variable Signal Attenuator

This passive attenuator has a 100K linear potentiometer that is DC coupled. Perfect for adding attenuators to those 1U/3U modules without.

Width: 6HP
Depth: 18mm

Notes: Dual 1 x 4 buffered mult (one audio or cv signal in with multiple buffered outputs).

The output of the first mult is normalled to the input of the second mult to create a 1×8 buffered mult.

Notes: This module allows you to connect balanced line level audio (+4 dBu) into your Eurorack modular system. It is a compact and easy way to patch in a rack mount/desktop FX units, external line-level instruments like synths and drum machines, outputs from your DAW, or many other line level sources.

Notes: This module allows you to interface your Eurorack modular system to the pro balanced line level world (+4 dBu). You can send audio out to rack mount/desktop FX units, patch to external line-level instruments like synths and drum machines, interface to a DAW, and much more.

Features:

1 x Eurorack modular level signals to Balanced TRS 1/4? output path
Uses a high quality THATCorp balanced line driver IC
Output path steps a nominal Eurorack level (10 Vpp) down to +4 dBu with up to +6 dB gain.

Notes: Dual 4-way passive mult (one audio or cv signal in with multiple unbuffered outputs)

On the back of the pcb is a pair of solder points marked as "link". You can connect these (with a solder blob or small jumper wire) to turn the mult into a single 8 channel Mult instead of 2 x 4 channel.

Notes: Tiny little low-pass gate in Intellijel's compact 1U format. Great value approach to this west coast classic module, based on a vactrol for that natural, organic sound.

Supplier's Notes:

Drop this module (or a few of them) into your 1U row, patch in some sound sources, and then ping them with gates and CV to get some instantly pleasing results. So simple and fun!

Natural dynamics with the magic of vactrols.

In general, low pass gates (LPGs) control the amplitude and timbre of a signal by opening and closing a low pass filter. When the gate is closed, no frequencies are allowed to pass through (and no output is heard). As the gate begins to open, the lowest frequencies pass through to the output. As the gate opens further, the output grows louder and its high frequency content increases.

Traditional Low Pass Gates use vactrols to control the opening and closing of the filter. Encased within a vactrol is both a light source and a light detector. Applying a control voltage to the vactrol lights its internal LED i the brightness of which is measured by its detector. What makes vactrols particularly unique (and well-suited to musical applications) is their non-linear response to voltage - in particular, the way in which the internal LED slowly dims (rather than shutting off instantly) when the control voltage is removed. This sonic coupling of timbre and volume, along with the circuit's natural decay, makes the low pass gate particularly adept at producing tones associated with struck objects, like hand drums or marimbas. Indeed, low pass gates are the main ingredient of the so-called Buchla Bongo sound.

The Intellijel Passive Low Pass Gate 1U is a simple, vactrol based, 1-pole, passive low pass gate, which is controlled by an external CV input. Without positive control voltage, the gate is completely closed and none of the LPG's input signal is passed through to the output. Increasing amounts of positive CV open the gate i making the output signal both louder and brighter. At +5V, the gate is fully open and the input signal is passed through to the output.
This makes LPGs sound very different (and more acoustic) than the traditional complement of envelopes, VCFs and VCAs that are employed in most subtractive synthesizers. Exciting the vactrol (via the CV input) with a trigger, noise blast, or short envelope will result in a very natural sounding filtered envelope that's reminiscent of the sonic characterics of struck objects, which are allowed to decay naturally.

In addition, because this is a passive circuit (no power is applied to it), its sonic characteristics are somewhat dependent upon the audio signal you feed into it, making it a very natural and organic way to shape a signal's volume and tone.

Pairs very well with the intellijel Shifty module to derive polyphony out of a only a few HP of modules.

Width: 6HP
Depth: 19mm

Notes: 1/4" TRS Jack Panel For Stereo Line In 1U Module

If you don't own an Intellijel case with built-in compatible 14" jacks, then you need to purchase a Stereo Line In Jacks 1U module, which connects via ribbon cable to the Stereo Line In 1U module to provide 14" TRS input jacks for interfacing with other studio or stage gear.

Width: 8HP
Depth: 39mm