Last post by MetaPixel -
I don't know how these equipment of yours works, but if bandwidth isn't a problem the Opus codec is one of the best options as it can go from very high quality transparent audio down to intelligible 6kb/s speech and have very low latency (20ms by default, can go even lower or higher if needed). The crackles you talk about... if there are crackles in this analog transmission I guess there would be some packet loss, Opus can compensate for packet loss as well using forward-error correction. Here are some examples, including one with the mentioned forward error correction. Note that the latest versions sounds even better than these examples.
If the bandwidth ever gets to be a problem, consider Codec 2 as well. It is also open source, designed for low bandwidth HF/VHF digital radio and can do good enough speech with lots of noise even at around 2kb/s.
Last post by kode54 -
I think he was trying to imply it's not lossless because you can stuff any data you want into it, including decoded MP3 files. But in that case, CDs aren't lossless either, since you can burn audio tracks from any lossy source you want.