помогите, пожалуйста, с переводом gen.

[littlemoor]

Здравствуйте! Хотела бы попросить о помощи с переводом.
Вот контекст:
All these issues are solved due to the way the Auro-3D codec allows
mixers to create an artistic and dynamically controlled PCM signal that
contains two or three other PCM signals without any audible loss. The
master of that mixed information is still a standard PCM signal with the
same sample rate as the original mixed tracks. This means that, in the
PCM domain, we can create multiple distributions in just one 5.1 master.
This 5.1 PCM master carries these formats as unperceivable metadata
and can be played back on every audio device that supports 5.1 PCM.
В этом тексте я не могу перевести "master"..
Заранее благодарю за помощь.

[Amor 71]

http://en.wikipedia.org/wiki/Master/slave_(technology)