Dear developers, could you be so kind and add more options to audio enconding when AAC is used (LC, HE, HE2)?

(Case is I record screencasts, then convert them with Shana from AVI (with PCM sound) to MP4 (with lossy sound). If there is music on background it's better to use LC-AAC, but if there’s speech comments only, then HE/2 AAC would compress it better.)