Draft:MaccaTroll

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• Comment: In accordance with Wikipedia's Conflict of interest guideline, I disclose that I have a conflict of interest regarding the subject of this article. Arnvidk (talk) 15:34, 19 April 2026 (UTC)

MaccaTroll (also referred to as Maccatrols or Maccatroll) is a custom-built live electronics control system used in contemporary vocal performance. It was developed by Arnvid Karstad and Asle Karstad and is primarily used by the Norwegian vocal ensemble Trondheim Voices.

The system has been described in international media as a set of wearable electronic devices enabling performers to manipulate and transform their own vocal output during live performance.^[1]

MaccaTroll consists of wireless, body-worn controller units operated by individual performers. Each unit allows real-time manipulation of vocal processing parameters, including delay, reverberation, pitch shifting, and looping.^[2]

The system is designed for ensemble use, enabling each performer to independently process their own voice while contributing to a collective electronic sound field.^[3]

The system emerged from experimental performance work involving Trondheim Voices in the mid-2010s. Early implementations of similar technology were used in theatre productions such as 100 hemmeligheter (2014), where reviews describe the use of specially built electronic sound devices for live vocal processing.^[4]

By the late 2010s, the system appears under the name Maccatrols in connection with Trondheim Voices’ Rooms & Rituals project, where it is described as a system of wireless controllers enabling performers to process their own voices in real time.^[5]

The system has also been presented in international festival contexts, including the Moers Festival, where it was described as enabling live looping and vocal transformation through custom-built wearable devices.^[6]

MaccaTroll consists of a distributed system of wearable interfaces used to control live audio processing. Each performer operates an individual controller, allowing real-time modification of vocal effects within an ensemble setting.

Documented functions include:

• real-time looping
• delay and reverberation processing
• pitch-based transformations^[7][8]

The system has undergone successive hardware iterations during its use in different performance contexts. Early implementations were developed for initial Trondheim Voices productions, while later configurations were adapted for larger-scale staged works and touring performances.

These changes reflect ongoing technical refinement of a custom-built wearable controller system used in live vocal electronics performance.^[9]

MaccaTroll has been referenced in artistic research environments associated with the Norwegian University of Science and Technology (NTNU), where it appears in practice-based research on vocal performance, improvisation, and live electronics.^[10]

It has also been presented in academic-artistic research contexts discussing custom-built performance technologies and ensemble interaction systems.^[11]

• New Interfaces for Musical Expression
• Digital musical instrument
• Live electronic music
• Vocal processing
• Trondheim Voices