https://ffmpeg.org/doxygen/trunk/dca__syncwords_8h_source.html
FFmpeg: libavcodec/dca_syncwords.h Source File
ffmpeglibavcodecdcasyncwordsh
https://www.ringcentral.com/apps/syncwords
Syncwords for RingCentral Events | RingCentral App Gallery
Provide on-demand captions and translations for both live and pre-recorded events.
ringcentral eventssyncwordsappgallery