Sending audio and response times
Quality of results and response times relate to each other, in order to receive a timely response, it is important to send small chunks of data. But for the quality of your results it is better to send larger chunks. This all relates to the contextual awareness of the system. Scriptix advices to send chunks between 8KB and 64KB in size. Smaller chunks do work but may result in lesser quality, larger chunks work too, but result in larger response times. With the conversion used above (16Khz PCM Wave) 1 second of audio corresponds to 32KB of data.
Scriptix has a few private models for callcenter purposes. These models are build with 8Khz audio data 16-bit low endian. Ensure to adjust the audio rate, and corresponding blocksize, for these kind of sessions.