Difference between revisions of "Audio setup"

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<span style="font-size:medium;"><span style="font-size:small;">In order to record audio, we need to connect a microphone to the Pi. If you connect a USB mic, you can ensure that the Pi recognizes it by typing<span style="font-family:courier new,courier,monospace;">lsusb</span> at the command line</span></span>
 
<span style="font-size:medium;"><span style="font-size:small;">In order to record audio, we need to connect a microphone to the Pi. If you connect a USB mic, you can ensure that the Pi recognizes it by typing<span style="font-family:courier new,courier,monospace;">lsusb</span> at the command line</span></span>
  
<code>pi@raspberrypi ~ $ lsusb</code>
+
<code>pi@raspberrypi ~ $ lsusb</code><br/><code>Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp.<br/>Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub<br/>Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.<br/>Bus 001 Device 004: ID 0000:0538<br/>Bus 001 Device 006: ID 0d8c:013c C-Media Electronics, Inc. CM108 Audio Controller<br/>Bus 001 Device 005: ID 1c4f:0002 SiGma Micro Keyboard TRACER Gamma Ivory</code>
 
 
<code><br/>Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp.<br/>Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub<br/>Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.<br/>Bus 001 Device 004: ID 0000:0538<br/>Bus 001 Device 006: ID 0d8c:013c C-Media Electronics, Inc. CM108 Audio Controller<br/>Bus 001 Device 005: ID 1c4f:0002 SiGma Micro Keyboard TRACER Gamma Ivory</code>
 
  
 
Here we have connected the C-Media USB Microphone.
 
Here we have connected the C-Media USB Microphone.

Revision as of 14:03, 29 April 2015

For a number of experiments we will need to manipulate audio signals with the Raspberry Pi. Here we give a few hints on how to get audio to work.

Audio Input

In order to record audio, we need to connect a microphone to the Pi. If you connect a USB mic, you can ensure that the Pi recognizes it by typinglsusb at the command line

pi@raspberrypi ~ $ lsusb
Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
Bus 001 Device 004: ID 0000:0538
Bus 001 Device 006: ID 0d8c:013c C-Media Electronics, Inc. CM108 Audio Controller
Bus 001 Device 005: ID 1c4f:0002 SiGma Micro Keyboard TRACER Gamma Ivory

Here we have connected the C-Media USB Microphone.

You can obtain the device details by typing arecord -l

pi@raspberrypi ~ $ arecord -l

​**** List of CAPTURE Hardware Devices ****

card 1: Device [USB PnP Sound Device], device 0: USB Audio [USB Audio]

 Subdevices: 1/1

Subdevice #0: subdevice #0