From 74bdac50b257b986cea38a2c08134c430fc5654f Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Thu, 6 Apr 2006 17:37:13 +0200 Subject: Add samplerate rate converter plugin Added a rate converter pluging using libsamplerate. The plugin is built only when libsamplerate is detected by configure. See doc/samplerate.txt for usage. This plugin is released under GPL (to follow the license of libsamplerate), not LGPL. --- doc/samplerate.txt | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 doc/samplerate.txt (limited to 'doc/samplerate.txt') diff --git a/doc/samplerate.txt b/doc/samplerate.txt new file mode 100644 index 0000000..4c4fcfb --- /dev/null +++ b/doc/samplerate.txt @@ -0,0 +1,30 @@ +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 + -- cgit