Add notes by audio

I use Audemic only for commuting to work, mostly by bicycle. I would often like to add notes as I listen to certain points, but it is not feasible to type while I am commuting. Please add an option to add notes by voice. This would primarily mean saving audio notes, though speech-to-text would be a nice option, maybe for later.

I realize that this feature would greatly increase the storage requirements for the Audemic server. You should probably have a maximum account limit of audio storage (small for free users so they can try the feature and more generous for paid users). If users hit the limit, then they either have to convert their audio notes to text or delete them to free up space.