Bagài

BAGÀI

Multipurpose Thingamabob

bagài / baˈgaːi / s.m. [modenese dialect, from a late Latin bagagium ‘baggage’, formed after the late Latin baga, deriving presumably from the Anglo-Saxon bag (see ancient French bague, Provençal bàgua, ‘bundle’), whose root may be traced down to the Indo-European *pac, ‘to tie,’ from which also ‘package,’ ‘pact’] – ‘thing,’ ‘thingamabob.’ A term used when the actual name of a thing or a person does not come to mind.

A module that is at the same time a clock burst, S&H, audio bitcrush, or fluctuating random voltage generator is indeed a bit elusive to describe in a single word. Even if one tries, some aspects will always be missing.

Why bother, then? Let us just call it “that thingamabob,” or better, “that bagài.”

 

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Description

Bagài is an analog sample and hold, bitcrusher, and downsampler for Eurorack systems, also capable of generating clock bursts, fluctuating random voltages, and colored noise.

It consists of six highly intertwined sections:

  1. A clock with straight and random outputs (yellow)
  2. An analog noise generator with variable color (grey)
  3. A bipolar fluctuating random voltage generator (white) with variable rate
  4. A sample and hold the circuit (orange) with selectable time scale, slow for modulation, or fast for audio sampling up to 48 kHz.
  5. An 8-bit quantized version of the orange S&H circuit with variable bit depth (red)
  6. A clock burst section (green).

By default, it outputs bipolar random voltages and triggers. The voltages are fluctuating, stepped, and quantized with selectable bit depth. The clocks are straight, randomized, or “burst.”

Once you start patching, you can use it as a S&H, audio downsampler, and bitcrusher, with a sample rate of 48 kHz.

All its major parameters are voltage controllable.

It belongs to the same family as Sapèl, with the following differences.

Sample and Hold with an 8-Bit Quantizer

Bagài features two stepped S&H circuits with open input (semi-normalled by default to an analog noise source).

The quantized one has a LSB selector that defines its bit depth, from 1 to 8 bits.

Random Triggers & Clock Bursts

Besides the well-known “main,” “more than,” and “less than” modes, Bagài also features a clock burst circuit that creates super fast and unpredictable streams of gates that you can combine with the main clock or to any other trigger you want.

Voltage-Controllable Bitcrusher

When used with audio signals, the 8-bit quantized S&H becomes a warm bitcrusher effect with voltage-controllable bit depth!

Dynamic Downsampler

Bagài’s internal clock can switch to an audio rate mode going up to 34 kHz. Patching audio signals into the S&H input will transform Bagài into an analog audio downsampler.

Open Signal Path

Lots of semi-normalled connections allow you to use Bagài in infinite ways: cross-patching has never been this fun.

Start and Stop Controls

You can control both the main clock and the clock bursts via external gates. The main clock also features a button to manually hold it.

Analog Noise

At Bagài’s core is a thermal noise generator that feeds the S&H circuit, creating random voltage streams. The noise output features a knob that changes its color, emphasizing the high or low frequencies.

Fluctuating random voltages and Global Rate of Change

The feature we all loved on Sapèl, now bipolar and with extended range!

BAGÀI

SAPÈL

Clock generators

1

2

Clock range

~0.05-75 Hz / ~0.025-34 kHz

~0.1–60 Hz 

Fluctuating random voltage circuits

1

2

Fluctuating random voltage type

Bipolar (extended range)

Unipolar

Quantized random voltage circuits

1 Bipolar

2 quantized to Octaves Unipolar
2 quantized to Semitones Unipolar

Quantization approach

Fixed source amplitude, variable bit depth (1-8 bit)

Fixed 6-bit, variable source amplitude

Unquantized S&H circuits

1

2

Unquantized S&H type

Bipolar

Unipolar

S&H source

Built in Thermal noise or any external signal

Built in Thermal noise

Random clocks

1 section with Simultaneous More than, less than, and burst

2 sections Selectable more than or less than

Probability distribution

On the fluctuating random voltage

On every generator

Burst Section

1

N.A.

Noise Sources

 With tone control

Blue, white, pink, red

Noise Generators

1 built in thermal noise

4 built in thermal noises

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