Summary

Demonstrating an unusual application of a CMOS NOR gate to implement a CMOS varactor controlled VCO, I explore the idea of circuit schematics as a music notation and how scholars and practitioners might create and analyze notations as part of the rich web of interactions that constitute current music practice.

This is the first of a set of thematic overviews of CNMATs work I am writing that cover the period since our inception to the closing in 2017 of the research sector after David Wessel’s death. The activities themselves are more completely understood with concurrent perspectives of many themes so this serialization is more a reflection of the cursed sequentiality of language than any suggestion that a particular theme might be more important than an other. Future themes may include Spatial Audio, Musical Programming Tools, Musical control Structuring, Instrument Building, etc.

In a recent workshop on e-textile sound for the 2018 e-Textile Spring Camp, I provided a unifying framework for analog and digital sound synthesis and capacitive sensing techniques under the rubric of relaxation oscillators.

The following pages provide context for the workshop and include links to contributions from my co-teacher, Martin De Bie. This includes pointers to various iterations of his 555 timer-based Textilo project.

This project will be expanded ongoingly with further relaxation oscillator schemes.

Here follows my workflow to produce the publication list and bibliography on adrianfreed.com.

Pervasive Cameras: Making Sense of Many Angles using Radial Basis Function Interpolation and Salients Analysis

Yotam Mann, Adrian Freed

Abstract. This paper describes situations which lend themselves to the use of numerous cameras and techniques for displaying many camera streams simultaneously. The focus here is on the role of the “director” in sorting out the onscreen content in an artistic and understandable manner.

Commentary proposed for NIME Reader

The fingerphone is my creative response to three umbridges: the waste and unsustainability of musical instrument manufacturing practices, the prevailing absence of long historical research to underwrite claims of newness in NIME community projects, and the timbral poverty of the singular, strident sawtooth wavefrom of the Stylophone – the point of departure for the fingerphone instrument design.

David Wessel’s Slabs: a case study in Preventative Digital Musical Instrument Conservation, Freed, Adrian , SMC2016, 2016, Hamburg, (2016)

Not my first publication, but my first one with some challenging engineering. I did this in my late teens and it was published in a hobby electronics magazine, "Electronics Australia". https://adrianfreed.com/content/audio-oscillator-using-digital-ics

I discovered by accident that some folk from Greece published the same ideas in a professional technical journal in 1989 (attached). If you are a scholar of such things it is interesting to compare and contrast the modes of articulation in my vernacular engineering approach with those of the academic paper.

An audio oscillator using digital ICs, Freed, A. , Electronics Australia, 01/1978, Volume 39, Number 10, p.53-4, (1978)