Since, the early / mid 1980's, computers have become apart of musician's lives , on stage, rehearsal and studio . In the late 1970's/ early 1980's, Tom Schultz of the Rock band, Boston was in the middle of serious Court Litigation with his record label. So with his down time, he founded Schultz Research and development and created many new ground breaking technologies , such as the Rockman, X-100 and other rack mountable analog units that broke the mold to bring the sounds of the studio on to the stage . By 1985, a new form of technology took the World by storm , M.I.D.I. Implementation. From then on, many companies started using computer software to control effects moduals , live on stage or the studio. Now, A.I. has entered the Music Gear Industry .
The early days were endless fun. both ways around, with the button getting pressed before the band were ready, to the playback breaking down when the bands mikes were turned right down to prevent acoustic feedback. The funniest moment ever, was when the wrong version of a song was loaded. Amidst a round of applause, the guy started his vocal and his voice miraculously became female. Even classical music is not immune. Studio recording such as this are used, for releases following the BBC promenade concerts. While it is admitted on the label, you would need a microscope to read it.
If I recall correctly Frank Sinatra was famous for using a microphone, a Telefunken U47. (Referenced in one of Frank Zappa's songs.) Before his time people like Al Jolson had to sing very loudly to be heard in a concert setting. The microphone allowed Sinatra and others to "croon" or sing softly and still be heard. So innovation, especially electric or electronic, has been around for awhile. Today a Telefunken costs about $9,000.
I can activate two part guitar harmonies or three part guitar harmonies . Use Guitar Synthesizers or go from clean to heavily distorted guitars . I can go from Jimi Hendrix's House Burning Down tones to Pantera at the Stomp of a button.