The biggest advance in recording technology in the 1960s was the wider introduction of multitrack recording. Because of the growing importance of popular music, many new recording studios were founded in the US and in the UK, and some artists even started thinking about building their own private studio complexes, such as Jimi Hendrix’s Electric Lady Studios for example (which only became operational in 1970, after Hendrix’s death).
Companies heavily invested in the development of new technologies, which finally led to a wider use of 8-track and even 16-track recording facilities in that decade. The Fairchild 670 stereo compressor was very popular, and Neumann introduced a number of classic microphones that are still in production today, such as the U 87, U 89, KMR 81, KMR 82, and USM 69.
Most of the music was sold on vinyl, with both 7-inch 45 rpm singles and 12-inch 33 rpm albums being very popular. The 8-track tape was introduced in the mid 1960s and became quite popular in the US. The compact cassette (aka MC or music cassette) had been invented around the same time, but it originally wasn’t a very popular format, at least not in pre-recorded form.
Even the concept of music piracy originated from the 1960s, as recording music on blank tapes became more and more popular in the second half of the decade.