

www.audiophilerecordingstrust.org.uk
Welcome to the Audiophile Recordings Trust Our aim is to make available the highest quality recordings, usually in 6 or 7 channel formats, with completely natural record and playback techniques. We will not use digital effects, arbitrary mixing, equalization, noise reduction, compression, convolution or add reverberation all of which we believe are artificial and unacceptable for the highest quality recording. As well as promoting Ambiophonic natural surround recording and playback, I am also keen to promote improvements in audio systems by encouraging audiophiles to test their systems in their own room environment. In much of the material here, you will see that rooms have a profound effect on audio reproduction whether you are listening to normal stereo, 4 channel SACD or 7 channel Ambiophonics with the most basic or most expensive equipment. It is an ambitious project to concentrate again on the very basics of good sound reproduction. Good luck with your systems ! Phil Marshall Audiophile Recordings Trust / Marshall Choong

Sound test files now available for download Audio recordings may be classified as 2 types : Those that make no attempt to capture stereo cues. This is the most common commercial recording using multichannel techniques often with close microphone placement to individual sound sources. Stereo placement in the final recording is then fixed by stereo panning at the final mixing stage. Natural recording methods, such as binaural methods using dummy heads or similar, which try to capture all the original stereo information available to the ear. The Audiophile Recordings Trust is a non-profit making organization created to promote and produce natural *multichannel* recordings that capture full 360 degree sound images. The systems of particular interest are *Ambiophonics* and the related *Panambiophonics* which are presented in more detail in Section 1. A direct link to the Ambiophonics site is www.ambiophonics.org The defects inherent in traditional stereo are presented in Section 1 with a brief description of the Ambiophonics system. Sections 4 and 5 contain articles that discuss in detail our findings with regard to listening rooms, their characteristics, and their significant impact on speaker design and performance.

Current Status	March 2007 1. Mk2 recording head completed 2. Addition of side channels to improve + - 90 degree images. 3. Initial tests and calibration complete, first recordings expected March 2007 May 2007 Mk4 recording head completed, see section 2
Section 1:	An Overview	Marshall Choong Panambiophonic Listening Room
Section 2:	Description of our recording equipment and listening facility. Information for those interested in making their own recordings.	6 channel recording head
Section 3:	Crosstalk cancellation processing
Section 4:	This section contains articles of general interest to audiophiles: Article 1. Listening Room Treatment for more accurate music reproduction Article 1. pdf version Article 2. A Unified Explanation of Room Effects on Speaker Responses
Section 5:	*Sound test files now available for download* Section 5a Using your pc for Room / Speaker Measurement Section 5b Low Cost Speaker / Room Measurement Kit
Section 6:	Links to related sites, articles on sound localization and other papers
contact us
This site is sponsored by Marshall Choong , loudspeaker manufacturers www.marshallchoong.co.uk
Affiliated Sites Audiophile Products

This site is actively under development, last upload 2008-02-22