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43 lines
1.5 KiB
Plaintext
43 lines
1.5 KiB
Plaintext
ALSA Support in Rivendell
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Rivendell can optionally be compiled to provide direct support for
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soundcards using the Advanced Linux Sound Architecture (ALSA).
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Instructions on enabling such support can be found in the INSTALL
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file. Information about ALSA itself can be found at:
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http://www.alsa-project.org/
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STARTING UP RIVENDELL WITH ALSA
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When Rivendell's audio daemon, caed(8) is started, and ALSA support is
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enabled, caed(8) will look for PCM devices named rd<n>, where <n> is a
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number between 0 and 7. If it finds one or more, it will attempt to
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open the devices(s) for both playback and capture. If successful, the
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devices will then be available as Rivendell virtual 'card' resources,
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starting with the next available card number after any HPI or JACK
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devices have been started.
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CONFIGURING PCM DEVICE NAMES
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PCM device names for ALSA can be configured by means of entries in the ALSA
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configuration file. The ALSA configuration file can either be an '.asoundrc'
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file in the home directory of the user running the Rivendell daemons (normally
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'root') or an '/etc/asound.conf' file which will apply to all users. For the
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simple case of a single ALSA soundcard to be made visible to Rivendell, one
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would create an ALSA configuration file containing the following lines:
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pcm.rd0 {
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type hw
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card 0
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}
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ctl.rd0 {
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type hw
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card 0
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}
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This would create an 'alias' for the first ALSA soundcard in the
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system, called 'rd0'.
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More details regarding the syntax and uses of .asoundrc can be found
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on the ALSA web site in the documentation section.
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