Published April 18, 2026 | Version 1.0.0
Software Open

HeadTracking_Demo — REAPER session for "The B-Format as Score"

Authors/Creators

  • 1. Zurich University of the Arts (ZHdK) — Institute for Computer Music and Sound Technology (ICST)

Description

This REAPER session is a companion artefact for *The B-Format as Score:
Composition, Interpretation, and Spatial Form in Ambisonics* (Johannes
Schütt, 2026), submitted to the Journal of Artistic Research (JAR) via
the Research Catalogue platform.

**What this session demonstrates:**

The session illustrates the second thesis of the paper (§4.2): decoding
is not a neutral technical transfer but an aesthetic interpretation.
The same 7th-order HOA source — `A00 Rethinking Thought` (B-format, 64
channels) — is decoded through two parallel binaural paths: one static
(no rotation compensation) and one head-tracked (IEM SceneRotator
counter-rotates the scene in real time via OSC, before the binaural
decoder renders). A JS `AB Monitor Switch` enables immediate A/B
comparison on the master bus. The externalization difference is the
experiment's aesthetic payload.

**Contents:**

- `HeadTracking_Demo.rpp` — REAPER project
- `Media/` — source audio (A00 7th-order ambiX / SN3D, 64-ch PCM WAV, 48 kHz / 24-bit, ~52 s)
- `docs/headtracking_workflow.png` — session screenshot (Figure 1)
- `docs/A00_FOA_Analysis.html` — static FOA spectral/energy analysis of the source
- `README.md` — detailed reproduction instructions, test protocol, integrity verification

**Requires:** The JAR Reaper Ambisonics Bundle
([doi:10.5281/zenodo.19633159](https://doi.org/10.5281/zenodo.19633159))
for the REAPER environment, IEM SceneRotator, a binaural decoder
(dearVR AMBI MICRO or IEM BinauralDecoder), and the `AB Monitor Switch`
JSFX. Install the bundle first, then open this session's RPP inside it.

For the head-tracked path, an OSC head tracker on UDP port 7000 is
required (e.g. SceneRotator HeadTracker,
github.com/joambi/SceneRotatorHeadTracker).

**Target platform:** Apple Silicon macOS 13+ (Ventura, Sonoma, Sequoia).
Tested on REAPER v7.69 / IEM v1.15.0 / dearVR AMBI MICRO under the v1.0.0 Bundle.

**License:** CC BY 4.0 for session RPP, documentation, the AB Monitor
Switch JSFX, and the A00 source audio (excerpt from *Rethinking Thought*
© Johannes Schütt, released under CC BY 4.0).

**Integrity:**

SHA-256: e6dff0208ad04eb7a3c2326e78b7ba7e4abc7796aa7add549f87228c40e5954e
MD5:     69003d461bfa60172ebbc7a60b4b532d
Bytes:   336,751,396

Files

HeadTracking_Demo_v1.0.0.zip

Files (336.8 MB)

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Additional details

Related works

Is part of
Software: 10.5281/zenodo.19633158 (DOI)
Requires
Software: 10.5281/zenodo.19633159 (DOI)