• "busy-city-05" by rucisko
  LICENSED UNDER CC0 1.0 Universal (CC0 1.0) Public Domain Dedication

• "calm-city-park-haanwijk-nl150403-0578" by klankbeeld
  LICENSED UNDER CC0 1.0 Universal (CC0 1.0) Public Domain Dedication

• "background-music-sad" by chris_schum
  LICENSED UNDER CC0 1.0 Universal (CC0 1.0) Public Domain Dedication

• "crickets-evening-distant-music-people-applause-ms" by kyles
  LICENSED UNDER CC0 1.0 Universal (CC0 1.0) Public Domain Dedication

• "drops" by Andrewkn
  LICENSED UNDER CC0 1.0 Universal (CC0 1.0) Public Domain Dedication

• "hope-music-sad-melody" by PSOVOD
  LICENSED UNDER ATTRIBUTION 3.0 UNPORTED (CC BY 3.0)

• "school-hall-1" by Dr. Macak
  LICENSED UNDER ATTRIBUTION 3.0 UNPORTED (CC BY 3.0)

• "electronic-music-loop-001-accurate-time" by frankum
  LICENSED UNDER ATTRIBUTION 3.0 UNPORTED (CC BY 3.0)

• "happy-quirky-loop" by ispeakwaves
  LICENSED UNDER ATTRIBUTION 3.0 UNPORTED (CC BY 3.0)

• "br-001-rajasthan-music" by kevp888
  LICENSED UNDER ATTRIBUTION 3.0 UNPORTED (CC BY 3.0)

​

※Thanks to everyone for letting me use the sound.