PNG ICO ICNS MORE
UI
Pixel
Fugue Icons
volume, speaker
Black
16x16
Mixed
Smooth
Humility
volume, Control
48x48
PNG MORE
volume, Min, stock
24x24
volume, 0, stock
med, stock, volume
stock, volume, Mute
Simplicio
volume
128x128
volume, Down
Mute, volume
volume, Up
Arrows
Glyph
DefaultIcon ver 0.11
media, Mute, volume
256x256
volume, media
media, volume
Computer & hardware
Bitcons
Goldenrod
64x64
volume, high
volume, low
Business & finance
Wireframe mono icons
Audio, sound, speaker
volume, Down, sound
Music & multimedia
Iconic
volume, Mute
32x32
Sanscons
low, volume
3D
The Spherical icon set
sound, Mute, volume
MidnightBlue