In order to ensure the best performance, 3D Sound by Arkamys requires a large number of manual adjustments, this is the job of the acoustician, or ‘Golden Ear’ as he is known. These are not the minor adjustments needed to fine-tune the digital processing performed on a car radio, but a form of customisation that is vital for achieving such a result.
The adjustments may be broken down into three stages:

- In-car Listening and Measurement
Acousticians perform an analytical sound study in the vehicle, which involves assessing the amount of bass and treble, etc…. They then assess the factors distorting the sound (speaker location, shape of dashboard). These observations are subsequently expressed in the form of an acoustic data sheet for the vehicle.

- Sound correction
The data gathered by the acoustician is then processed during real-time sound adjustment in a computerised unit known as a professional equaliser. Fifty different types of acoustic corrections can therefore be made and together they constitute the correction map.
- In-car implementation
The digital correction map is entered into the radio’s audio processor and is subsequently integrated into every model in the range.
This sound processing will function continuously as long as the car radio is switched on, without requiring any prior adjustments by the user.

It is hard to describe sound sensations, especially when it comes to 3D sound. But it is possible to identify three major impressions after a listening session in a Renault Mégane kitted out with 3D Sound by Arkamys.

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3DSound by Arkamys is an audio processing software program designed to spatialise sound, in other words adapt volume so that the listener thinks the sound is originating from several sources. Unlike the 5.1 systems, 3D Sound by Arkamys does not require additional speakers to recreate the spatialisation effect, two speakers will suffice. To achieve this effect, 3D Sound reproduces the time lag and difference in sound intensity between the listener’s right and left ears, in other words the parameters the human ear requires to perceive sound in three dimensions.

Nor does 3D Sound need any special decoder or processing of the music source, since it is directly integrated into the equipment. In a car, 3D sound is located on the car radio’s DSP circuit. Such is the case with the Mégane III, the first vehicle to be series-equipped with this system.
Finally, unlike other on-board audio spatialisation systems (SRS, Qsound…), 3D Sound by Arkamys is specially configured on each type of vehicle by ‘Golden Ears’ (sound engineers and acousticians).