Sound Functionality

[daylechang]

This has been hugely beneficial to me so thank you very much for doing this and making it public! I had 2 suggestions:

1. I utilize both the low and high alarms, but sometimes I can't tell which alarm is being triggered because I just forget which sound is for which alarm. So I either have to guess or whip out my phone in the middle of a run to figure out what's happening. Could there be an option to use a voice alarm that says "high" or "low" so that I know which alarm is being triggered? Or something to that effect.
2. Is there a way to call out my current heart rate at a user-defined interval?

This is my first time writing an issue (don't really use GitHub) so let me know if there's a better place to provide feedback/suggestions. Thanks!