Hainbach demonstrates the technique of sound on sound using a Nagra tape recorder, focusing on the roles of the erase, write, and read heads. By bypassing the erase head, he creates multiple overlapping signals, adding depth and movement to the sound.
He explains how to cut and splice a tape loop using quarter-inch tape, emphasizing the importance of a smooth splice to minimize noise. This setup allows for the creation of a continuous loop that can be layered with new sounds.
Hainbach sets up the tape loop in a standard configuration and shows how bypassing the erase head results in a repeated sound, forming a rich, layered soundscape. This technique is ideal for creating more interesting and dynamic synth textures.