I have implemented jPlayer scaling for an app I have created. App looks like this in case you are interested:
The scaling code is pure css and does not use 'transform: scale' as this causes layout problems. It uses variables and css calculations to scale all the various sizes so that the whole thing can be made bigger and smaller as you need. Images are all svg so everything stays sharp at any scale.
How might I contribute this back? It was based on a pre-release version of Circle Player called 'Halo' that I got from Mark Boas some time ago.
(By the way, this is the same app that I am having trouble with when using Workbox to cache the mp3 files. The scrub bar doesn't work with cached mp3.)
Cheers,