Final answer:
The process of mixing and copying to create more available tracks for recording is called multitrack recording. It involves playing back recorded material from one tape machine while recording it onto another machine that has spare tracks allowing for layering of sounds, known as overdubbing.
Step-by-step explanation:
The procedure of mixing and copying to a new tape machine to create more available tracks involves several steps and is known as multitrack recording. Originally, the process starts with a recorded song on a portable device. What happens next is similar to the DIY approach where an artist might use multiple tapes and masking tape to mark sections or tracks. In a professional setting, the recorded material from one tape machine gets played back and simultaneously recorded onto a second tape machine which has spare tracks. The new machine effectively combines the original material with whatever new performances or sounds are being added. This could be done repeatedly to build up layers of sound, known as overdubbing. A noteworthy application of mixing in the art world can be seen in Christian Marclay's works where tape cassettes are used to symbolize the merging of music and art, as shown in figures like 5.4.16 and 7.4.17. It's important to ensure that the recording room, such as a gym, is suitable for the process in terms of acoustics and space for equipment.