IoT & Hardware
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You're reading from  Raspberry Pi for Secret Agents

Product typeBook
Published inApr 2013
PublisherPackt
ISBN-139781849695787
Edition1st Edition
Tools
Raspberry PiLinux
Concepts
Robotics
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Author (1)
Stefan Sjogelid
Stefan Sjogelid
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Stefan Sjogelid

Stefan Sjogelid grew up in the 1980s in Sweden, getting hooked on 8-bit consoles, Amigas, and BBSes. With a background in system and network administration, he packed his bags for Southeast Asia and continued to work in IT for many years, before love and a magic 8 ball told him to seek new opportunities in the North American continent. The Raspberry Pi is the latest gadget to grab Stefan's attention, and after much tinkering and learning a great deal about the unique properties of the Pi, he launched the PiLFS website (http://www.intestinate.com/pilfs), which teaches readers how to build their own GNU/Linux distribution and applications that are particularly useful on Raspberry Pi.
Read more about Stefan Sjogelid

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Configuring your audio gadgets

Before you go jamming all your microphones and noisemakers into the Pi, let's take a minute to get to know the underlying sound system and the audio capabilities of the Raspberry Pi board itself.

Introducing the ALSA sound system

The Advanced Linux Sound Architecture (ALSA), is the underlying framework responsible for making all the sound stuff work on the Pi. ALSA provides kernel drivers for the Pi itself and for most USB gadgets that produce or record sound. The framework also includes code to help programmers make audio applications and a couple of command-line utilities that will prove very useful to us.

In ALSA lingo, each audio device on your system is a card, a word inherited from the days when most computers had a dedicated "sound card". This means that any USB device you connect, that makes or records sound, is a card as far as ALSA is concerned—be it a microphone, headset, or webcam.

Type in the following command to view a list of all connected audio...

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Raspberry Pi for Secret Agents
Published in: Apr 2013Publisher: PacktISBN-13: 9781849695787
© 2013 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Stefan Sjogelid

Stefan Sjogelid grew up in the 1980s in Sweden, getting hooked on 8-bit consoles, Amigas, and BBSes. With a background in system and network administration, he packed his bags for Southeast Asia and continued to work in IT for many years, before love and a magic 8 ball told him to seek new opportunities in the North American continent. The Raspberry Pi is the latest gadget to grab Stefan's attention, and after much tinkering and learning a great deal about the unique properties of the Pi, he launched the PiLFS website (http://www.intestinate.com/pilfs), which teaches readers how to build their own GNU/Linux distribution and applications that are particularly useful on Raspberry Pi.
Read more about Stefan Sjogelid

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