SBC4204 User Guide - Revision history

Mparadis: /* Test the Audio */

2019-11-06T16:45:18Z

Test the Audio

← Older revision		Revision as of 16:45, 6 November 2019
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	You can either test using an audio file (.wav or .mp3) on a USB stick, or you can enter the URL of an internet radio station.		You can either test using an audio file (.wav or .mp3) on a USB stick, or you can enter the URL of an internet radio station.

	~~{{Code\|~~mpg123 ~~track1~~.~~mp3}}~~		[[Image:mpg123.jpg\|link=]]

	At this point, you should be able to hear audio coming from the speaker or headphones that you have plugged into the USB adapter!		At this point, you should be able to hear audio coming from the speaker or headphones that you have plugged into the USB adapter!

Mparadis: /* Configure Sound Card Index */

2019-11-05T22:06:24Z

Configure Sound Card Index

← Older revision		Revision as of 22:06, 5 November 2019
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	By default, you will probably see the following output:		By default, you will probably see the following output:

	{{Code\|1 snd_usb_audio}}		{{Code\|1 snd_usb_audio}}

Mparadis: /* Configure Sound Card Index */

2019-11-05T22:06:13Z

Configure Sound Card Index

← Older revision		Revision as of 22:06, 5 November 2019
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	This means our USB sound card index is set to 1, which means most audio programs will fail when they try to access index 0 which doesn't exist. In order to change the sound card index, navigate to {{Code\|/etc/modprobe.d/}} and create a new file there named {{Code\|alsa-base.conf}} with the following contents:		This means our USB sound card index is set to 1, which means most audio programs will fail when they try to access index 0 which doesn't exist. In order to change the sound card index, navigate to {{Code\|/etc/modprobe.d/}} and create a new file there named {{Code\|alsa-base.conf}} with the following contents:

	{{Code\|options snd-usb-audio index=0}}		{{Code\|<nowiki>options snd-usb-audio index=0</nowiki>}}

	This single line is all that is needed. Once you've created this file, you must reset the SBC for the changes to take effect. You can reset through the web interface or by cycling power. When it boots back up, you can try the {{Code\|cat /proc/asound/modules}} command again to see if the index has successfully changed to 0.		This single line is all that is needed. Once you've created this file, you must reset the SBC for the changes to take effect. You can reset through the web interface or by cycling power. When it boots back up, you can try the {{Code\|cat /proc/asound/modules}} command again to see if the index has successfully changed to 0.

Mparadis: Created page with "NOINDEX The USB Audio adapter cable enables audio input and output for the Phidget SBC. Category:UserGuide {{UserguideTOC|SBC4204.jpg|SBC4204}} ==..."

2019-11-05T22:05:04Z

Created page with "__NOINDEX__ <metadesc>The USB Audio adapter cable enables audio input and output for the Phidget SBC.</metadesc> Category:UserGuide {{UserguideTOC|SBC4204.jpg|SBC4204}} ==..."

New page

__NOINDEX__
<metadesc>The USB Audio adapter cable enables audio input and output for the Phidget SBC.</metadesc>
[[Category:UserGuide]]
{{UserguideTOC|SBC4204.jpg|SBC4204}}
==Getting Started==
The [{{SERVER}}/products.php?product_id=SBC4204 SBC4204 USB Audio adapter] provides sound capabilities to the PhidgetSBC4. The audio adapter offers two integrated channels - one for speakers or headphones, and one for a microphone. Using this product requires a working knowledge of Linux. To begin, make sure that you plug it into one of the SBC4's USB 2.0 ports, not the USB on-the-go port:
[[Image:SBC4_audio_port.jpg|link=|600px]]

Once you've plugged it in, you can type {{Code|dmesg <nowiki>|</nowiki> tail -n 10}} into the terminal.

Somewhere in the output, you should see a line that says

{{Code|usbcore: registered new interface driver snd-usb-audio}}

This indicates that the device has been recognized by your system.

== Install mpg123 ==

In order to test that the adapter is working properly, you'll need a program that can play sound. We recommend installing mpg123:

{{Code|apt-get install mpg123}}

If the test performed in the later section produces choppy audio, you can try using mpg321 or vlc instead.

== Configure Sound Card Index ==

Enter the following command into the terminal: {{Code|cat /proc/asound/modules}}

By default, you will probably see the following output:
{{Code|1 snd_usb_audio}}

This means our USB sound card index is set to 1, which means most audio programs will fail when they try to access index 0 which doesn't exist. In order to change the sound card index, navigate to {{Code|/etc/modprobe.d/}} and create a new file there named {{Code|alsa-base.conf}} with the following contents:

{{Code|options snd-usb-audio index=0}}

This single line is all that is needed. Once you've created this file, you must reset the SBC for the changes to take effect. You can reset through the web interface or by cycling power. When it boots back up, you can try the {{Code|cat /proc/asound/modules}} command again to see if the index has successfully changed to 0.

== Test the Audio ==

You can either test using an audio file (.wav or .mp3) on a USB stick, or you can enter the URL of an internet radio station.

{{Code|mpg123 track1.mp3}}

At this point, you should be able to hear audio coming from the speaker or headphones that you have plugged into the USB adapter!

SBC4204 User Guide - Revision history

Mparadis: /* Test the Audio */

Mparadis: /* Configure Sound Card Index */

Mparadis: /* Configure Sound Card Index */

Mparadis: Created page with "__NOINDEX__ The USB Audio adapter cable enables audio input and output for the Phidget SBC. Category:UserGuide {{UserguideTOC|SBC4204.jpg|SBC4204}} ==..."

Mparadis: Created page with "NOINDEX The USB Audio adapter cable enables audio input and output for the Phidget SBC. Category:UserGuide {{UserguideTOC|SBC4204.jpg|SBC4204}} ==..."