TLBX

2HP multipurpose mix, mult and math utility Eurorack module

TLBX is a tiny and flexible utility module in only 2HP that packs a lot of functionality in a small footprint. It can precisely mix, mult, add, subtract and multiply input signals in many different combinations enabled by clever normalization. Built with tight tolerance components, it works with both audio and precise CV. It is skiff-friendly and the perfect utility toolbox to squeeze into any tightly packed case.

At its core, TLBX is simple. It consists of three main sections: MULT, MIX and DIFF:

MULT is a 1-to-2 precision multiple. If you plug nothing into the input, the outputs will act as 1V and 5V voltage reference. Both references are calibrated are very precise - the 1V reference even has an error of less than 1mV and can be used to calibrate other modules or for precise octave transposition.

MIX is a 2-to-1 mixer or precision adder. The second input is normalized to the first one, enabling it to be used as a precise 2x voltage multipler.

DIFF is a 2-to-2 precision adder/subtractor. The first output is the sum of the inputs, the second output the difference.

All the sections can be used independently - however, they are also cleverly normalized to each other. This normalization expands the functionality of the module to far more than just the pure sum of its parts.

TLBX can be used as multiple with up to five outputs, as a mixer with 5 inputs - or anything in between. It can pose as precision 1V or 5V voltage referene, can multiply signals by fixed factors, and offset them precisely. It can transpose pitch CV up or down by 1 or 2 octaves and accomplish voltage range conversion in between 0-5V, -5-5V and 0-10V. It can even be used as a comparator - what makes TLBX truly special is its flexibility in a tiny footprint. 

Inputs/Outputs

• 3.5mm jacks
• 100k input impedance
• Designed for both audio and pitch CV
• DC Coupled
• Compensated zero-impedance output topology - no voltage drop regardless of input impedance of following modules

Usages

• Mixing and multipling in different configurations
• • 1-to-2 multiple, 2-to-1 mixer, 2-to-2 adder/subtractor
  • 1-to-3 multiple, 2-to-2 adder/subtractor
  • 3-to-1 mixer, 2-to-2 adder/subtractor
  • 1-to-2 multiple, 4-to-1 mixer
  • 1-to-5 multiple
  • 5-to-1 mixer
  • 2 channel stereo mixer, 1-to-2-multiple
  • 2 channel stereo mixer with one additional mono channel
• Precision 1V/5V voltage reference
• Fixed voltage multiplier
• Voltage range converter (between 0-5V, -5-5V, 0-10V)
• Octave transposer
• Comparator

Measurements

• DC precision
• • Static offset: typical <±0.1mV, max <±0.5mV
  • Scaling error: typical <±0.1%, max <±0.25%
• Voltage reference accuracy
• • 1V: typical deviation <±0.5mV,  max <±1mV
  • 5V: typical deviation <±1mV, max <±2.5mV

Technical specifications

• Width:  ​2HP
• Height: ​ 3U
• Depth: ​ 25mm
• Power: ​ 15mA (+12V), 15mA (-12V)
• Power header can be connected either way

Links

• Modulargrid