Sep 2013

Building a master volumes UI with impromptu

Based on one of the examples packaged with Impromptu, I wrote a simple function that uses the objc bridge to create a bare-bones user interface for adjusting your audio instruments master volumes.

The script assumes that your audio graph includes a mixer object called *mixer*. The UI controllers are tied to that mixer's input buses gain value.

The objc bridge commands are based on the silly-synth example that comes with the default impromptu package.


Being able to control volumes manually rather than programmatically made a great difference for me. Both in live coding situations and while experimenting on my own, it totally speeds up the music creation process and the ability of working with multiple melodic lines.

The next step would be to add a midi bridge that lets you control the UI using an external device, in such a way that the two controllers are kept in sync too. Enjoy!

P.s.: this is included in the

Cite this blog post:

Michele Pasin. Building a master volumes UI with impromptu. Blog post on Published on Sept. 15, 2013.


See also:


paper  Data integration and disintegration: Managing Springer Nature SciGraph with SHACL and OWL

Industry Track, International Semantic Web Conference (ISWC-17), Vienna, Austria, Oct 2017.

paper  Fitting Personal Interpretation with the Semantic Web: lessons learned from Pliny

Digital Humanities Quarterly, Jan 2017. Volume 11 Number 1


paper  PhiloSURFical: browse Wittgensteinʼs Tractatus with the Semantic Web

Wittgenstein and the Philosophy of Information - Proceedings of the 30th International Ludwig Wittgenstein Symposium, Kirchberg, Austria, Aug 2007. pp. 319-335