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Music Technology, Audio Technology, Sound Design, R&D & Education.

Acoustical Design

a Waterfall plot

Referenced near field monitoring is a way to sit closer to your monitors with the idea that sitting closer to the speakers (70-220 cm. depending on room size), will reduce the sound of the room in the mix. Flooding the monitoring position with direct energy from the loudspeakers will reduce the impact from side wall reflections at the monitoring position. The more your ears hear the sound from the speakers directly, the more you hear the actual speaker as the speaker designer intended. Near field monitoring minimizes reflections from side walls..., but does not eliminate all room sound.

The widely accepted professional standard is the ITU-R BS. 775-1. The recommendation states clearly a few well-known points: the positioning of the reference listening point is at the centre of an imaginary circle having a radius between 2 m and 4 m (min. and max. radius defined in the ITU-R BS.1116–1 recommendation). Concerning positioning angles, in the horizontal plane, there should be 60 degrees between front left and right speakers, with the centre speaker in the middle. Both rear speakers should be placed within 100 to 120 degrees from the centre line. The acoustical axis of the front speakers should be approximately at the listener’s ear height, meaning 1.2 m. for the ITU.

Due to simple physics every listening room is causing acoustic distortions, which strongly degrades the tonal-, temporal- & spatial quality of sound, listening at the sweetspot.

An ideal closed acoustical space has:

Standard room acoustical parameters are based on this ideal model.

A real closed acoustical space typically exhibits:

...unwanted artifacts which become more irratic in behaviour by a faulty loudspeaker setup.

Thus the key questions to be answered are:

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acoustiColour crossing borders, connecting knowledge, ..and getting inspired by art & science.

Because music is art & sound science, in 1988 acoustiColour is founded by musictechnologist (multidisciplined & certificated: electronics-, audio-, recording-, mix-, mastering engineer, composer, sound designer) and teaching musician Marcel Wardenier.

(Call +31 6 26 46 20 88 or email me).

(...who is also having problems with beliefs and much prefers to let physics do the talking! (John Watkinson on Slaying Dragons)).


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Stuff acoustiColour uses daily and do highly recommend you to check them out!


Measuring Hardware:
Measuring Software:
Room Correction:
Miscellaneous Software:

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Project Software Downloads:

Inspired by some of the most groundbreaking innovative audio pioneers/gurus acoustiColour created bootable CD/USB/VM images with clean builds of a hardened Debian Server for experimental dedicated realtime DSP Low-Latency JACK Audio Server Applications.

Disclaimer: as is, because this is work in progress.. (Altough functioning 99.99% stable in my audiolab 24/7!)
Please: don't forget to check out the tutorials & RTFM's!!

(And if you do read them, you'll notice how easy the concept is ported to other hardware platforms ☺!!)

(...acoustiColour simply loves the power of Open Source Software and Debian installed on a nowadays old useless-, but relatively silent Mac Mini 2,1+. Easily 'build' your own DSP power house running 16/24 bits 44.1/48/(96*) kHz., syncing on WC via S/PDIF signal using one of these instant functioning DSP bootable disk images.

(*) Dependent on production date of Mac Mini 2,1+

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AES Anthology Microphones AES Anthology Stereophonic Techniques AES Anthology Time Delay Spectography AES Anthology Loudspeakers Vol 1 AES Anthology Loudspeakers Vol 2 H.J. Pain, The Physics of Vibrations and Waves M.P. Stavrou, Mixing with your mind Ken C. Pohlman, Digital Audio B. Owsinski, Mixing Engineers Handbook F. Everest, Acoustic Techniques for Home and Studio F. Everest, Master Handbook of Acoustics F. Everest, Critical Listening Skills for Audio Professionals E. Winer, The Audio Expert - Everything You Need to Know About Audio B. Katz, Mastering Audio - the art and the science B. Katz, iTunes Music - Mastering High Resolution Audio Delivery T. Holman, 5.1 Surround Sound - Up and Running Templeton/Saunders, Acoustic Design for the Home Studio T.J. Cox/P. D'Antonio, Acoustic Absorbers and Diffusers - Theory, Design and Application G. Ballou, Handbook for Sound Engineers - The New Audio Cyclopedia D. de Vries, AES Monograph - Wave Field Synthesis R. Nicol, AES Monograph - Binaural Technology E. B. Brixen, Audio Metering - Measurements, Standards and Practice J. D'Appolito, Luidspreker Meettechniek J. L. Murphy, Introduction to Loudspeaker Design F. E. Toole, Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms V. Dickason, The Loudspeaker Design Cookbook R. R. Sanders, The Electrostatic Loudspeaker Design Cookbook Dipl.Ing. W. J. Tenbusch, Grundlagen der Lautsprecher M. J. Lawrence, High-Quality Loudspeaker Engineering T. Görne, Tontechnik: Hören, Schallwandler, Impulsantwort und Faltung, digitale Signale, Mehrkanaltechnik, tontechnische Praxis T. Görne, Mikrofone in Theorie und Praxis P. M. Pfleiderer, Zeitrichtige, klangrichtige und akustisch hochwertige Musik in Konzertsälen, in Wohnräumen, in Tonstudios, sowie mit Lautsprechern oder Kopfhörern durch PfleidRecording und Pfleid-Marot-Mixing M. Senior, Mixing Secrets for the Small Studio C. Nocke, Raumakustik im Alltag: Hören - Planen - Verstehen E. Mommertz, Akustik und Schallschutz: Grundlagen, Planung, Beispiele A. Friesecke, Studio Akustik: Konzepte für besseren Klang W. M. Willems, Schallschutz: Bauakustik: Grundlagen - Luftschallschutz - Trittschallschutz (Detailwissen Bauphysik) Ulf-J. Werner, Handbuch Schallschutz und Raumakustik: für Theorie und Praxis (Bauwerk) S. Weinzierl, Handbuch der Audiotechnik (VDI-Buch) B. Owsinski, The Recording Engineer’s Handbook S. Turnidge, Beyond Mastering: A Conceptual Guide B. Owsinski, The Mixing Engineer's Handbook B. Owsinski, The Mastering Engineer's Handbook T. Görne, Microfoons - in theorie en praktijk P. Swarte, Introductie tot de Electro-akoestiek R. Römer/G. Schwamkrug, Luidsprekers - fabels en feiten H. Baggen, Praktische Filtertechniek D. Doepfer/C. Assall/M. Marass/R. Langer, MIDI in theorie en praktijk J. Dunn, Audio Precision application note #5: Measurement Techniques for Digital Audio B. Metzler, Audio Precision - The Audio Measurement Handbook

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