Using bluetooth headphones in Debian

I installed Debian 10 today and so far am having a very positive experience. However, as of right now, I'm having to use this laptop on speaker. This wouldn't be a problem, but I'm blind so everyone in the same room as my laptop will be able to hear my speech. I have bluetooth headphones, Amazon's Echo buds to be exact. I'm trying to have them work with Debian. I paired them up, no problem, using the blueman bluetooth manager. They also report being connected, all fine so far. But no sound from the headphones, it continues to play from the speaker, even when my sound dialogue insists that the

Question by Tobias Heath on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.