"Step 1: Hold music is a ubiquitous fact of modern life. Ask yourself what hold music you’d like to hear while waiting for someone to pick up the other end of the line, or while waiting for a conference call to begin.
Step 2: Record a short piece of hold music that satisfies the scenario you pondered in Step 1. Your finished track should be suitable for looping, since you never know how long you’re going to be on hold."
For this recording, I played an 80s Casio keyboard horn and synth tracks over the demo function that came with an equally old drum machine (Yamaha DD-14). The xylophone, dogs, and applause are from the drum machine's sound effects bank, and can be played over the demo.