SMPTE ST 428-12, D-Cinema Distribution Master Common Audio Channels and Soundfield Groups This repository is public. Please consult CONTRIBUTING.md, CONFIDENTIALITY.md, LICENSE.md and PATENTS.md for important notices. Reporting issues Please report issues at https://github.com/SMPTE/st428-12/issues or at the 27C Chairs 27c-chair@smpte.org.