Status - scsynth_info and mixer_info (active signal)

Hi! I had an idea about a condition that could fire notes/samples/sounds, if no current sound, or on sound finish, or even better crunching the synthnode/mixer current status for all threads, if everything is basically threads, to get info on loops and noise

Is this information already available somewhere in SP?
Anyone else considered/played with anything similar?

Are there already available to determine if anything is currently playing, or other stuff like status of threads and loops ?