The following are some commonly used cable types that can be used to transmit background music over long distances:

1. Audio extension cable: Audio extension cable is used to connect audio equipment, such as speakers, Audio receivers, speakers, etc. They are available with 3.5mm (1/8") or 6.35mm (1/4") plugs and have longer cable lengths suitable for transmitting audio signals over long distances.

2. Audio extension cable: Audio extension cable is also used to connect audio equipment, and has a longer cable length, which can extend the transmission distance of audio signals. They have 3.5mm or 6.35mm plugs, and the length can be chosen according to requirements.

3. Audio optical fiber cable: Audio optical fiber cable uses optical fiber to transmit audio signals, which can transmit high-quality audio signals over a longer distance. This kind of cable is less sensitive to electromagnetic interference and is suitable for use in more complex environments.

4. XLR cable: XLR cable is a balanced audio cable used to connect professional audio equipment. They can transmit high-quality audio signals and are suitable for longer transmission distances and situations requiring high-fidelity sound quality.