vosk-asterisk | Speech Recognition in Asterisk with Vosk Server | Speech library

In my live phone speech recognition project Python's asyncio and websockets modules are used basically to enable data exchange between client and server in asynchronous mode. The audio stream which to be recognized comes to the client from inside of a PBX channel (Asterisk PBX works for that) via a local wav file that cumulates all data from answering call until hangup event. While conversation is going on, an async producer pushes chunks of call record (each of them no larger than 16 kB) to asyncio queue, so that a consumer coroutine can write data to buffer before sending to the recognition engine server (my pick is Vosk instance with Kaldi engine designed to connect using websocket interface). Once the buffer exceeds a specific capacity (for example it may be 288 kB), the data should be flushed to recognition by send function and returned (as a transcript of the speech) by recv. The real-time recognition does matter here, therefore I need to guarantee that socket operations like recv will not halt both coroutines throughout websocket session (they should be able to keep queue-based data flow until the hangup event). Let's take a look at whole program, first of all there is a main where an event loop gets instantiated as well as a couple of tasks: