I use an older Pi with a USB DAC to bring in audio and data from my radio scanners, for a slow-moving side project. Goal is to mux the audio with time sensitive

I use an older Pi with a USB DAC to bring in audio and data from my radio scanners, for a slow-moving side project. Goal is to mux the audio with time sensitive radio metadata, like talk group and location (surprisingly difficult given messy state of formats, containers and playback options) and deliver this to clients on the network for easy listening and other processing (e.g. speech-to-text, mapping, etc.). Learned a bunch of gstreamer in the past half year, hoping to pick this all back up with the Pi4.