July 2017
Intermediate to advanced
434 pages
12h 59m
English
Content preview from FreeSWITCH 1.8
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Audio conferencing
Audio streams are composed by a sequence of audio samples. Each audio sample is essentially a number (a quantity) representing the evolution of the sound in time. Sound can be described by those sine waves we've seen in high school textbooks, and each sample is the value in amplitude at a certain point in time.
Mixing (merging, combining) two or more sound samples is essentially about summing their numeric value, and divide the total by the number of streams we are mixing (eg: taking the average at each point in time). Obviously, is not at all so simple when the samples have been previously compressed, encoded, etc. And ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.