You call a company, get put on hold, and there it is: that thin, warbling, slightly seasick loop of hold music. It sounds terrible everywhere, on every phone, for every company. That consistency is the clue. The reason hold music sounds so awful has almost nothing to do with taste and everything to do with the pipe it’s squeezed through.
Phone lines were built for one thing: talking
The telephone network was engineered decades ago to do a single job well — carry a human voice clearly and cheaply. To save bandwidth, it throws away everything outside the range of speech, keeping only about 300 to 3,400 Hz. Your voice fits neatly inside that band. Music does not.
Music lives in the highs and lows that the phone system deliberately discards — the shimmer of cymbals, the weight of a bass line, the air around a note. Pump a full song through a pipe built for talking and all of that gets sheared off before it ever reaches your ear.
Why it turns to mush, specifically
It’s not just the missing frequencies. Phone audio is heavily compressed by codecs tuned for voice, and those codecs mangle the things music depends on. Sustained notes warble, complex chords smear into a crunch, and anything busy turns into digital soup. Layer on cheap playback hardware and old low-bitrate files, and the awful sound is basically guaranteed.
In plenty of systems, the “music on hold” is still a low-quality audio file from years ago — and in some old setups, it’s literally a CD player or radio wired into a phone closet that nobody has touched in a decade.
It’s what happens when nobody owns it
Here’s the real lesson buried in the bad music: hold audio is a piece of the customer experience that almost no one is responsible for, so it never gets improved. It just sits there, quietly annoying every caller.
The most-heard song almost nobody knows
Here’s the ultimate hold-music footnote. The default hold tune on Cisco phone systems — an unassuming instrumental called “Opus No. 1” — has been played to callers billions of times, making it one of the most-heard pieces of music on Earth. Almost no one can name it, and almost everyone has suffered through it.
It was written in 1989 by a teenager on a Commodore Amiga home computer, then quietly became the global soundtrack of being on hold. It’s a perfect encapsulation of the whole phenomenon: a piece of the customer experience that reaches millions of people and yet was set-and-forgotten decades ago. The parts of a business nobody is actively watching have a way of quietly becoming the parts everybody hears.
Products are full of these orphaned corners — the parts nobody owns, so nobody fixes. They’re also where most of your customers’ frustration actually lives. When we build software, chasing down those neglected edges is half the work, because that’s where a good experience quietly falls apart. Know a corner of your business like that?
Related: Why your phone’s battery percentage is basically a guess.
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