Wanting to step up audio on your site?

Here are a few sources of public domain music:

Purple Planet Music They do require attribution.

Bensound

–Bensound’s terms:
You are free to use this music in your multimedia project (online videos(YouTube,…), websites, animations, etc.) as long as you credit Bensound.com, For example: “Music: www.bensound.com” or “Royalty Free Music from Bensound“

No Audiobook
No Audio Podcast 

No Song Making
No Music Remix

3. For sound effects and royalty-free music for registered [free] users: ZapSplat

From ZapSplat: All our free sounds and music are safe to use for any non-commercial and commercial use, even for broadcast. We check every file for quality and we only add content we, or our contributors recorded themselves.

You must credit us/provide attribution when using our sounds/music in your work. An example would be: Sound from Zapsplat.com