Raspberry Pi - Revision history

Stahl: /* Sound */

2016-01-06T17:37:02Z

Sound

← Older revision		Revision as of 19:37, 6 January 2016
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	List sound devices: <pre>cat /proc/asound/cards</pre>		List sound devices: <pre>cat /proc/asound/cards</pre>

			List only names: <pre>cat /proc/asound/card*/id</pre>

	Change volume, select USB sound card with F6, caution: the sound blaster can be very loud on your headphones. <pre>alsamixer</pre>		Change volume, select USB sound card with F6, caution: the sound blaster can be very loud on your headphones. <pre>alsamixer</pre>

Stahl: /* JACK Audio Connection Kit */

2014-08-03T21:27:45Z

JACK Audio Connection Kit

← Older revision		Revision as of 23:27, 3 August 2014
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	[http://hyperreal.org/raves/spirit/vibe/JacksHouse.html "Who is Jack, and what is it that Jack does?"]		[http://hyperreal.org/raves/spirit/vibe/JacksHouse.html "Who is Jack, and what is it that Jack does?"]

	On a headless raspberry pi (assuming raspian distro), we need a trick to start jack WITHOUT an X session ~~like so~~.		On a headless raspberry pi (assuming raspian distro), we need a trick to start jack WITHOUT an X session, for this we'll need a small script.

	Make sure to replace U0x41e0x30d3 with your device name, that you get via the above mentioned command to list devices.		Make sure to replace U0x41e0x30d3 with your device name, that you get via the above mentioned command to list devices.

Stahl at 17:49, 26 July 2014

2014-07-26T17:49:08Z

← Older revision		Revision as of 19:49, 26 July 2014
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			__FORCETOC__
	= Sound =		= Sound =

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	List sound devices: <pre>cat /proc/asound/cards</pre>		List sound devices: <pre>cat /proc/asound/cards</pre>

	Change volume (select USB sound card with F6): <pre>alsamixer</pre>		Change volume, select USB sound card with F6, caution: the sound blaster can be very loud on your headphones. <pre>alsamixer</pre>

	Save volume: <pre>sudo alsactl store</pre>		Save volume: <pre>sudo alsactl store</pre>
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	export DISPLAY=:0		export DISPLAY=:0
	export `dbus-launch \| grep ADDRESS`		export `dbus-launch \| grep ADDRESS`
	~~/usr/bin/~~jackd -dalsa -dhw:U0x41e0x30d3 -r44100 -p1024 -n2		jackd -P70 -t3000 -dalsa -dhw:U0x41e0x30d3 -r44100 -p1024 -n3 -s
	</pre>		</pre>

			==Send Audio to the Raspberry Pi over LAN==

			This assumes that you are running jackd (check section above).

			<pre>
			sudo apt-get update
			sudo apt-get install jacktrip
			</pre>
			Check out the [https://ccrma.stanford.edu/groups/soundwire/software/jacktrip/ jacktrip] documentation.

			Make sure, jackd on your computer has the same settings as defined on the raspberry (ie the settings you just put in the above bash script).

			On your computer, start jacktrip as server (don't forget to start jackd first, if it's not running already.):<pre>jacktrip -s</pre>

			Start jacktrip on the raspberry pi (exchange YOUR_SERVER_IP_HERE with your IP, doh!):<pre>jacktrip -c YOUR_SERVER_IP_HERE</pre>

Stahl: /* JACK Audio Connection Kit */

2014-07-26T16:30:47Z

JACK Audio Connection Kit

← Older revision		Revision as of 18:30, 26 July 2014
Line 17:		Line 17:
	[http://hyperreal.org/raves/spirit/vibe/JacksHouse.html "Who is Jack, and what is it that Jack does?"]		[http://hyperreal.org/raves/spirit/vibe/JacksHouse.html "Who is Jack, and what is it that Jack does?"]

	On a headless raspberry pi (assuming raspian distro), we need a trick to start jack WITHOUT an X session like so (replace U0x41e0x30d3 with your device name, that you get via the above mentioned command to list devices):		On a headless raspberry pi (assuming raspian distro), we need a trick to start jack WITHOUT an X session like so.

			Make sure to replace U0x41e0x30d3 with your device name, that you get via the above mentioned command to list devices.

			Also you might want to change the other parameters (sample rate, frames, ...)
	<pre>		<pre>
	#!/bin/bash		#!/bin/bash

Stahl: Created page with " = Sound = Get a cheap USB soundcard: [http://www.aliexpress.com/snapshot/6085241515.html "Creative Sound Blaster"] List sound devices:

cat /proc/asound/cards

C..."

2014-07-26T16:28:33Z

Created page with " = Sound = Get a cheap USB soundcard: [http://www.aliexpress.com/snapshot/6085241515.html "Creative Sound Blaster"] List sound devices: <pre>cat /proc/asound/cards</pre> C..."

New page

= Sound =

Get a cheap USB soundcard: [http://www.aliexpress.com/snapshot/6085241515.html "Creative Sound Blaster"]

List sound devices: <pre>cat /proc/asound/cards</pre>

Change volume (select USB sound card with F6): <pre>alsamixer</pre>

Save volume: <pre>sudo alsactl store</pre>

Play wav file on external device: <pre>aplay -D plughw:1,0 test.wav</pre>

== JACK Audio Connection Kit ==

[http://hyperreal.org/raves/spirit/vibe/JacksHouse.html "Who is Jack, and what is it that Jack does?"]

On a headless raspberry pi (assuming raspian distro), we need a trick to start jack WITHOUT an X session like so (replace U0x41e0x30d3 with your device name, that you get via the above mentioned command to list devices):
<pre>
#!/bin/bash
export DISPLAY=:0
export `dbus-launch | grep ADDRESS`
/usr/bin/jackd -dalsa -dhw:U0x41e0x30d3 -r44100 -p1024 -n2
</pre>