What instrument in particular was difficult to record?

Answer 1

The theremin is often considered difficult to record due to its unique method of sound production, which relies on the player's hand movements in relation to two metal antennas. This non-contact playing technique makes it challenging to achieve precise pitch and dynamics, requiring skilled performers to maintain consistent control. Additionally, the theremin's sensitivity can result in unwanted noise or interference during recording sessions. Capturing its ethereal sound while minimizing background noise demands careful microphone placement and production techniques.