To add textures or custom models, it is suggested to use a modeling program that allows for a visual-based editing system. Audacity is one of the most popular audio editors. While this can be done using one of numerous sites online, an audio editor program is suggested to allow customizing or trimming of audio files. In order to add sound files, you must put it in the proper format (.ogg).
Anything that violates the Minecraft EULA.There are some things that you should NOT do when creating a resource pack / texture packs, which includes but is not limited to:
Resource packs allow users to include files that can modify or add custom textures, models, animations, music, sounds, user interfaces, and languages that change the way some things in Minecraft behave or look. 4.6.2 Adding the folders and sound in your resource pack.