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Mixed
Flat
Pictograms vol.1
switch, music, volume
SlateGray
512x512
sound, communicate, phone
Black
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Mixed rounded flat icon
megaphone, sound, notification
Tomato
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Things
sound, Audio, volume
SteelBlue
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Orbicons (Free)
music, Headphones, listen
LightSeaGreen
mp3, ipod, sound
SkyBlue