The sound recordings are an essential part of any modern multimedia endeavour when commencing interviews, vlogs, podcasts, conference calls captured into mono audio channel, or when performing instrumental and location stereo recordings, or when capturing or generating sound sources into complex acoustic environments using immersive mic techniques. Tri-side technique provides a flexible multichannel pattern to record a relatively wide but accurate stereo sound image with a warm sense of ambience preserving the basic mono compatibility and the ability to be automated and controlled by adaptive AI-based software.