I was at a jazz concert the other week, and I was looking at the CDs and stuff the musicians had brought to sell.
Adam Pulz Melbye had brought a shrinkwrapped bass string:
With a Bandcamp download code. (Censored above.)
I just had to buy one! Genius!
It’s weird that I haven’t seen anybody doing something along these lines before… It’s like a souvenir from the concert, but it’s also a way of selling music.