I know the app supports arrow keys for fwd/rwd and space bar to toggle pause/play. Would it be possible to also support media keys with something like SPMediaKeyTap?
Edit: Actually, rather than SPMediaKeyTap which is pre-arc ObjC, MediaKeyTap is a nice little Swift rewrite/wrapper. Getting this working was pretty easy, only really required lightly modifying AppDeligate.swift. There's also a Cocoapod for it. If you're interested, I can make a pull request, although it's really only a few minutes effort.
https://github.com/nhurden/MediaKeyTap
I'm quite happy now. I can listen to text with my bluetooth headphones, and pause and rewind as needed while away from my desk. (I use BTHSControl to allow BT to send media keys, and got a cheap long USB range bluetooth adapter that lets me roam quite far.)
Update Mar 2017: BTHSControl isn't supported under Sierra, but mac-bt-headset-fix does support Sierra -- it allows BT headsets to send media keys for play/pause, fast forward and rewind. The above mentioned modification to Dictater continues to work.