University of Applied Sciences Technikum Wien

Chordion & FreakyTricky - Accessible Music Sequenzer & Synthesizer

"Freaky Tricky" and "Chordion" are accessible music interfaces developed by Georg Schmelzer Ziringer in cooperation with Harry Hötzinger, Cornelia Salomon (student of bachelors degree in Biomedical Engineering) and the AsTeRICS Academy team. Both music interfaces build upon the Open Source Software Pure Data - which must be downloaded and installed before they can be used. "Freaky Tricky" and "Chordion" can be combined with special input solutions - for example the AsTeRICS-based 'FaceTracker-Mouse' or eyetrackers like TobiiEyeX or EyeTribe.

Freaky Tricky is a step-sequenzer for triggering sound samples in defined order - to create rhythms. You can choose between two default sample sets, a basic drumset and a set of bongos. The default instruments can be changed by loading own sound samples.


Scrennshot of Freaky Tricky Step Sequenzer - an accessible Music interface

Freaky Tricky Accessible Music Interface, created with Pure Data by Georg Schmelzer Ziringer

With the "Chordion" synthesizer, the user can play harmonic chords and send them to the internal sound card or a synthesizer via Midi format. The Open Source synthesizer "ZynAddSubFX" is recommended as a good alternative to the (limited) standard Midi instruments of the computer's sound card. To route the Midi signals from "Chordion" into "ZynAddSubFx", a midi routing tool is needed, we recommend the free version of LoopBe virtual midi driver. 

Screenshot of accessible Chordion programmed with Pure Data

Chordion Accessible Music Interface, created with Pure Data by Georg Schmelzer Ziringer

To experience the music interface in action, here is a video from the band "AsTeRICS and the toilers of tune" where Harry Hötzinger ist playing the accessible music interface. Other band members are Petra Feuerstein (voc), Georg Schmelzer-Ziringer (bass), Andi Sagmeister (banjo) and Leo Geist (drums).


The Pure Data files for "Chordion" and "FreakyTricky" can be dowloaded here: Chordion & FreakyTricky

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kindly supported by:  
     Link to City of Vienna MA23
Since 2016 this work is
supported by the
City of Vienna (MA-23)
within the Call18 project
ToRaDes, grant nr. 18-04.

  link to ToRaDes Project