PNG ICO ICNS MORE
Arrows
Pixel
Sanscons
low, volume
Black
64x64
UI
Lynx Black
high, speaker, volume
16x16
medium, Audio, volume
volume, Audio, low
Audio, volume, muted
PNG MORE
BWPX
volume
Gray
18x18
Down, volume
Up, volume
volume, Mid
Gnome icons
Audio, low, volume
24x24
medium, volume, Audio
volume, Mute
Family & home
Snow
play, volume, Forward
WhiteSmoke
32x32
Desktop apps
Splashyfish
sound, speaker, volume
Blue
ForestGreen
Mute, volume
Red
volume, off
volume, Quiet
Tango
volume, low, Audio
high, Audio, volume
muted, volume, Audio
Computer & hardware
ASP.NET icons
volume, sound, music
Olive
Circular
speaker, volume
LightSeaGreen