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Viewing file:     lavrate.txt (1.01 KB)      -rw-r--r--

Rate Converter Plugin Using libavresample
=========================================0

The plugin in rate-lavr subdirectory is an external rate converter using
libavresample library. You can use this rate converter plugin by defining a
rate PCM with "converter" parameter, such as:

	pcm.my_rate {
		type rate
		slave.pcm "hw"
		converter "lavrate"
	}

The plug plugin has also a similar field, "rate_converter".

Or, more easily, define a global variable "defaults.pcm.rate_converter",
which is used as the default converter type by plug and rate plugins:

	defaults.pcm.rate_converter "lavcrate"

Write the above in your ~/.asoundrc or /etc/asound.conf.

The following converter types are available:

  - lavcrate_higher		Use	length=64
  - lavcrate_high  		Use length=32
  - lavcrate       		Use length=16
  - lavcrate_fast  		Use length=8
  - lavcrate_faster		Use length=4

Linear interpolation and cutoff values are automatically used depending on
the supplied parameters and whether the plugin is used to upsample or
downsample.