Unless otherwise noted below, all sounds are licensed as public domain and may be used in your projects. The following two sounds are licensed under the creative commons license and require attribution. You may view the creative common license here : https://creativecommons.org/licenses/by/3.0/ Bass Drop Up (drop.wav) by THE_bizniss https://freesound.org/people/THE_bizniss/sounds/37667/ Bass Drop Down (drop_rev.wav) by THE_bizniss https://freesound.org/people/THE_bizniss/sounds/37669/