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Dir : ~/usr/share/doc/libasound2-plugins/

View File Name : samplerate.txt

Rate Converter Plugin Using Libsamplerate
=========================================

The plugin in rate subdirectory is an external rate converter using
libsamplerate by Erik de Castro Lopo.  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 "samplerate"
	}

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 "samplerate"

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

The following converter types are available:

  - samplerate_best	Use SRC_SINC_BEST_QUALITY
  - samplerate_medium	Use SRC_SINC_MEDIUM_QUALITY
  - samplerate		Use SRC_SINC_FASTEST
  - samplerate_order	Use SRC_ZERO_ORDER_HOLD
  - samplerate_linear	Use SRC_LINEAR