Sound

Sound is a menu in the options section of Super Smash Flash 2 that allows the player to adjust the volume levels of the game. It includes three options in three respective sliders the player can adjust at will: the general music, the sound effects, and the voices (including the announcer, playable and non-playable chracters) of the game. Both, the sounds for the menus and the sounds for the matches themselves get affected according to how the player wishes each option to be adjusted. The default level for all three sliders is at 70 but it can be risen up to 100 and lowered down to 0.

Trivia

 * By coincidence, Super Smash Bros. for Wii U got almost exactly the same sound options arrangement as Super Smash Flash 2: both have three sliders for music, sound effects and and voices, where they are represented by red, blue and green respectively (though the last two colors are swapped in SSBWU) and the default volume level is 70.
 * It should be noted that the sound option was incoporated in version 0.6 of the SSF2 demo, released back in 2010, four years before Super Smash Bros. for Wii U was even released.
 * The intro movie is the only feature of the game that isn't affected by the sound settings and will always play at the same volume.