Humble Bundle is now offering a Music and Sound FX pack with an offer expiration of December 10, 2019. For $1, the offer includes 12 packs including GUI sounds, Christmas music and SFX, various voice packs, 8-bit SFX, and more.
Developers offering more can find an additional 15 packs of horror SFX, pirate sounds, fantasy game sounds, footsteps, and more.
The highest tier offers an additional 16 packs with fantasy/RPG music, various voice packs, platformer music, gun sounds, and various music packs.
Check it out here.