Playing .m4a files

Forum|Forum|5 years ago
January 16, 2021
4 replies
664 views

Both ALAC and AAC files use suffix .m4a How does Sonos differentiate between these two formats

m4a

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Best answer by ratty

From the metadata, in the file header.

J

John B

Differentiate in what sense? For what purpose? I assume it is clear from the music file metadata.

rattyAnswer

From the metadata, in the file header.

Ken_Griffiths

.m4a is a container and Sonos devices will play .alac (lossless) or aac (lossy) from devices at the bitrates shown in this Sonos support document:

https://support.sonos.com/s/article/79

A

AshwellAuthor

Contributor I

Thanks - I now understand that Sonos differentiates .m4a files as to whether they are ALAC and AAC from the metadata in the file header that identifies the bitrate available.

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