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Master Quality Authenticated (MQA)
Last updated: May 5, 2022 12:07. Revision #3942
Master Quality Authenticated is an audio codec using a sophisticated compression algorithm, and a form of file authentication intended for high-quality
audio streaming and file download. This allows the listener to receive digital audio at the original studio quality.
Using a unique ‘origami’ folding technique, the information is packaged efficiently to retain all the detail from the studio recording. Hardware or software
with MQA decoding capability can ‘unfold’ the MQA file and reveal the original master resolution.
The file is also 'authenticated' to guarantee that it is the definitive master recording from the studio, artist or record label.
MQA tracks are delivered to the listener with all the required data for full studio quality hidden, or 'folded' within the file itself. This means with each
unfold, more data is revealed for higher quality playback.
There are essentially four versions of MQA playback. And depending on how your system is configured, each will perform different unfolds to reveal more
of the dormant information hidden within the file.
No Unfold
This is the raw folded MQA file that can be played back through any device as no decoding is required. This is typically better than CD quality at 44.1 or
48 kHz.
MQA Core Decode
This is the point at which the first unfold takes place. The MQA Core Decoder authenticates, decodes full dynamic range, and matches to the current
playback settings. This can be performed either within software (TIDAL, Audirvana, Roon) or hardware that contains a MQA Core Decoder, and at this
point the file is upscaled to 88.2 or 96 kHz.
MQA Core Decode with Hardware Rendering
In this method of playback, a combination of software and hardware is used to further unfold the file. As with MQA Core Decoding, the software decodes
the MQA 24 bit / 44.1kHz file and unpacks it to 24 bit / 88.2 kHz. This file is then output to the hardware renderer where it is expanded up to 24 bit /
352.8 kHz.
Full Decode and MQA Renderer
Full Decoding and MQA Rendering is only possible using hardware with MQA certification and is the optimum playback method of MQA files. This will
require all stages of the unfold or processing to take place within the hardware, which is fed the untouched MQA file before performing the various
decodes and rendering. This is typically the highest possible quality and files can be upscaled to a maximum resolution of 768 kHz.
