RGBmix

RGBmix is a custom project developed for Edutones, a team of music trainers based in Rotterdam. The project goal was to develop a simple audio mixer with a very accessible controlling interface for non-music people to be used in school-workshops with young students or in team building sessions for business teams.

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Music Workshop, Wolfert College Rotterdam (The Netherlands)

Team Building Session, Rotterdam School of Management (The Netherlands)

Design

The main characteristic of the RGBmix is the round-shape design. This specific clockwise placement of knobs and ports permit to 6 persons divided in 3 groups to sit around the table and cooperate on the mix and obtain an individual mixed output for each group.

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#Colorcode

The RGBmix hasn’t any label on the surface. The three colours: red, green and blue, represents the 3 different audio sources: a lead synthesiser, a drum-machine and a bass-synthesiser. So each coloured knob adjust the volume of the same color audio source. Headphones outputs and volume knobs are instead grey.

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Concept Design

Schematic and PCB design

RGBmix is a portable rotary mixer with 3 stereo inputs shared between 3 independent mixing groups. This device it’s designed specifically for team-working and workshop activities.

Features

  • 3 low-impedance stereo inputs (6,3mm jack)
  • 6 individual headphone amplified outputs with volume control
  • 3 mixing subgroups
  • Powered by a 9v battery or with DC jack 9v/12v
  • Power lights
  • Polarity protection circuit

The making of

The device is entirely 3D printed with FDM process and high quality shock-resistant PLA filaments.
The final result it’s a 15cm by 4cm hard shell without any visible screw. Some parts have been spray painted and sanded to reach the appearance we wanted to achieve.