Just came across this product which is a wearable metronome. It pulses to help keep tempo.
https://www.soundbrenner.com/
Wouldn't it be cool if synthesia could pair with the device to have a metronome without needing to hear the continuous clicking?
Not trying to advertise the product but it was the first thing I thought of when I saw it. Wondering what the community thinks of something like this.
Wearable Metronome Support
Search the forum before posting your idea. 
No explicit, hateful, or hurtful language. Nothing illegal.
No explicit, hateful, or hurtful language. Nothing illegal.
Cool idea. But check out the negative reviews at Guitar Center before buying: https://www.guitarcenter.com/Soundbrenn ... tronome.gc