In Path to Rust Audio I briefly mentioned that the repos are in a variety of states of maintenance - here I'll give my own impression of the current state of each of the repositories.
ogg and lewton - active I believe both were started by est31, both seem to be actively used and worked on.
coreaudio-sys and coreaudio-rs - active I started these to add audio I/O support to CPAL a few years ago. I have since moved to Linux as my daily machine and don't often get the chance to test for them anymore, however Rhuagh has kindly taken over testing and reviews. I still try to review code when I can.
deepspeech-rs - seems active