What is voice control? What is Andhadhun?

Voice control: that is, voice control, which controls the volume of sound. (generally, the sound repairers in bars and KTV are called voice control. Andhadhun: He is a person who uses special equipment to control the volume, tone and timbre of sound sources and design sound systems in song and dance halls (including discos and performance bars), singers' concerts, recording studios, musical performances and venues. This is all my own investigation. I hope to adopt ~~O(∩_∩)O~~ to help improve the adoption rate ~ ~ Thank you ~ ~