Opus No. 1, the Cisco hold music, full story and then some.
Great remixes:
https://www.youtube.com/watch?v=z8V5VM_aAeY
https://www.youtube.com/watch?v=WotiZe4zWzA
https://www.soundcloud.com/marigolddesign-inc/311-405-boost-volume-tim-carleton-opus-no-1cisco-hold-music-marigold-synthwave-remix
https://www.youtube.com/watch?v=bE2qMTexL1M
hip-hop style:
https://www.youtube.com/watch?v=S7QpEFYQSDY
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