When I think of the passage of time, there are tools that I'm surprised haven't evolved sooner. One of those musical tools is the metronome. For many decades, the concept of what a metronome could be seemed cemented.

I'm not trying to imply that the metronome did not evolve. Metronomes with odd time signatures and programmable set lists appeared. Even though those small evolutions happened, one noticeable change hadn't occurred: Feeling a metronome instead of hearing it.

Peterson (the company known for strobe tuners) developed a vibrating accessory to a metronome that would attach to your pants. But it didn't take off for whatever reason and is now discontinued. Players didn't like attaching the vibrating accessory to their belt or felt it was limited to a physical connection to a metronome.