When an IP camera allows for the streaming of sound, it usually uses G.711 audio codec (also known as A-Law or μ-Law). This whole concept has just one little downside — no mobile devices and hardly any desktop devices can play these audio codecs.
The IP camera might have been streaming sound, but you had no way to hear it.
We wanted to do something about this, so we improved the angelcam streaming platform and eliminated the problem. The sound track from your IP camera now automatically transcodes to a codec, which is compatible with all mobile and desktop devices.
Whichever camera you connect to angelcam, you’ll have no problem hearing the sound.