Question Software (free) to automatically slightly increase singing/guitar quality?

[bendre18]

I'm recording a song in video for a friend, and I'd like to increase the overall audio quality (me singing and playing acoustic guitar), but I don't know the first thing about messing with audio settings.

I'm hoping there's an audio equivalent to cameras that have like HDR, or auto adjust that makes pictures a little prettier.

Thanks in advance

 

[rgd1101]

like auto-tune?