'Scale it' is an open source program (written in graphical programming language [Pure data][1] and in [Faust][2]) that allows sonification of a signal distribution in real time.
The set of objects plays stream of numbers on a predetermined scale, ranging from 2 to 12 steps.
There are two different possibilities of sonification of the signal. One of the objects, tone, generates changes in pitch of a monophonic tone. The other object, chord, expresses the input value in width of polyphony.
In combination with object that calculates running mean and sample standard deviation in user defined chunks you can observe, or rather, hear, the distance of each data point from the mean.
"Scale it" is being developed primarily for neurofeedback purposes. To allow straightforward and customizable instrument to carry sonic feedback about EEG activity in specific regions of the neocortex.
**Running the program**
You can download set of Pure data objects from the github pages. The objects are in folder Pd compiled.
These objects are necessary for running Pure data patches that you can find in the components section of this osf project pages.
If you download the pure data objects from github, please run the pd patch gameMixed.pd from the "test" folder.
**Scale it_tone_pd**
![enter image description here][3]
Go to this component to find a set of patches that demonstrate the usage of "Scale it" in neurofeedback application. For this purpose, a synthesiser of EEG oscillations is incorporated in the subpatches.
![enter image description here][4]
If you want to use the program with real-time EEG signal, use OpenVibe to send the signal via OSC.
**Dedication**
Development and publication of this software was supported by the grant SVV 2020 – 260556 realized at the Charles University, Faculty of Arts.
[1]: https://puredata.info/
[2]: https://faust.grame.fr/
[3]: https://files.osf.io/v1/resources/d4gm3/providers/osfstorage/5ea729ef3854e2012d69c583?mode=render
[4]: https://files.osf.io/v1/resources/d4gm3/providers/osfstorage/5ea72a1376188b015390f5df?mode=render
