AMTRA – ambiophonics transcoder

AMTRA the Ambiophonics Transcoder and Player transforms your music files to provide a completely new listening experience.

 11.77 incl. VAT if applicable Add to cart

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  • Windows 7 – 10 / 32 & 64 Bit
  • Mac OSX Lion 10.7.3 – Mojave 10.14.x

Ambiophonics Transcoding and Playback


64Bit High Precision Audio Engine


Input Audio Formats: WAV, AIFF, FLAC, ALAC, DSD and MP3


Output Audio Formats: WAV, AIFF and FLAC


Sample Rates: 44.1 kHz – 384kHz


Bit Depth: 16, 24 & 32Bit


Metadata (album, cover picture, etc.) transfer for AIFF to AIFF and FLAC to FLAC conversion


Batch processing with freely configurable output file names


The test version is limited to one minute playback and transcoding per audio file


The activation key allows three parallel activations on Windows and/or MacOS X

Apple MacOS X Image - v1.1.7

(minimum 10.7.3 – Lion)
» Release notes


Microsoft Windows 32/64bit Installer - v1.1.7

(minimum Windows 7 – 32bit)
» Release notes

Download 32bit Download 64bit

 11.77 incl. VAT if applicable Add to cart

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The AMTRA can be fully tested before purchase. Only the playback and analysis is limited to 30 seconds.
The activation allows 3 parallel installations. In fact, it is possible to use the Windows and MacOS X Version in parallel by just using one activation key.


The most crucial difference between Ambiophonics and Stereophonics (Stereo) is the elimination of crosstalk and therefore a reduction in the frequency response errors at the entrance to the ear canal, comb filtering, localization distortion, and pinna direction finding errors. In stereo we hear a delayed signal from the right speaker with our left ear and vice versa, which causes the above mentioned adverse effects and many others.


Advantages of Ambiophonics:

Elimination of Comb filtering effects and pinna direction finding errors.

By having the speakers close together (approx 20° Speaker Separation) reflections by walls and the bass mode response of the room are much easier to control.

The center image is very stable and therefore always easy to locate. No need for a center speaker in 5.1 surround.

The sound stage has enhanced depth, and realistic width (up to 180 degrees) which simulates a normal 3D listening experience. You’re able to pinpoint each instrument on the full width stage. To achieve optimal cross talk cancellation, Ambiophonics has a sweet spot (similar to stereo) along the median line, where the sound stage has its truest representation.

The most remarkable difference between Stereophonics and Ambiophonics is the loudspeaker setup. The classical 60° stereo triangle is replaced by a 20° loudspeaker separation called Ambiodipole. The Recursive Ambiophonic Crosstalk Elimination (RACE) Algorithm ensures a 120° to 180° wide sound stage even with the loudspeakers that close together.

The RACE algorithm has been developed by the Ambiophonics Institute:

Which records sound best?

In contrast to the standard stereo setup where even spatially rich recordings that contain true binaural cues (Interaural Time and Level Differences (ITD, ILD) unavoidably suffer large changes in these values causing clearly audible losses in depth, clarity, localization accuracy and frequency response errors, Ambiophonics produces a much more realistic sound stage since it is binaural rather than phantom imaging in nature.

Many productions mix monaural microphones or direct sources between channels to create phantom images using just ILD, but even these recordings benefit from the wider and more precise delivery of the captured ILD.

What do I need to do to listen to Ambiophonics?

Place your loudspeakers in a separation angle of around 20° instead of the usual 60° for stereo reproduction. If you don’t want to move your HiFi-Speakers then just try your PC-Speakers to enjoy Ambiophonics.

Use the AMTRA software to play or even transcode for storage your audio files for later Ambiophonics playback through your favorite audio player.

Ambiophonics Speaker Position


The AMTRA loads several audio file formats with all conceivable sample rates into the play list.

Using this internal Ambiophonics audio player makes the setup of your system as easy as possible. If everything is set then the AMTRA transcodes the audio files by applying the RACE algorithm.

Finally, you are able to playback the resulting audio files by using any audio player of your choice enjoying the 3D sound stage of Ambiophonics.

What are all these settings?

The RACE algorithm has a couple of settings to allow it to work flawlessly with a variety of speaker angles and personal taste.

We choose to set the default values in a way that there is no need to change anything for the standard 20° loudspeaker setup.

Nevertheless, if you want to optimize the settings for your speaker setup then just keep the following details in mind:

The RACE Attenuation defines the amount of expected cross talk needing to be cancelled. A value of around -2.3 to – 2.9 dB is most likely optimal.

The Delay sets the times when the cancellation signals, that eliminate the cross talk, are sent out.

To increase the mono part of the signal the Center value can be set accordingly. The zero value leaves the center level unaltered.

AMTRA Main Screen