The Advanced Linux Sound Architecture (ALSA) - utilities
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vivian,zhang 4157528808 alsabat: add round trip audio latency test
Audio latency is the time delay as an audio signal passes through
a system. There are many kinds of audio latency metrics. One useful
metric is the round trip latency, which is the sum of output latency
and input latency.

The measurement step works like below:
1. Listen and measure the average loudness of the environment for
one second;
2. Create a threshold value 16 decibels higher than the average
loudness;
3. Begin playing a ~1000 Hz sine wave and start counting the samples
elapsed;
4. Stop counting and playing if the input's loudness is higher than
the threshold, as the output wave is probably coming back;
5. Calculate the audio latency value in milliseconds.

Signed-off-by: Zhang Vivian <vivian.zhang@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2016-06-08 15:11:25 +02:00
alsa-info alsa-info: add alsa-info.sh.1 to EXTRA_DIST 2016-03-31 16:36:50 +02:00
alsaconf alsaconf: update gentoo to use modprobe.d method as everyone else 2013-11-14 08:51:55 +01:00
alsactl alsactl: init/ca0106, init/hda - use CTL{values} instead CTL{value} 2016-03-22 16:54:05 +01:00
alsaloop Makefiles - use AM_CPPFLAGS instead INCLUDES 2014-05-07 10:55:59 +02:00
alsamixer alsamixer: include missing mixer_controls.h 2014-06-25 10:54:40 +02:00
alsaucm alsaucm: Drop localbuild hacks 2015-08-04 18:26:40 +02:00
amidi Makefiles - use AM_CPPFLAGS instead INCLUDES 2014-05-07 10:55:59 +02:00
amixer amixer: skip showing asoc tlv byte controls 2016-01-29 07:26:56 +01:00
aplay aplay: fix lurking capture file overwrite bug 2016-04-14 14:35:42 +02:00
bat alsabat: add round trip audio latency test 2016-06-08 15:11:25 +02:00
iecset Makefiles - use AM_CPPFLAGS instead INCLUDES 2014-05-07 10:55:59 +02:00
include configure.in -> configure.ac rename 2014-05-07 10:55:59 +02:00
m4 Fix autoreconf 2005-08-19 13:07:45 +00:00
po update the gettext configuration 2014-05-07 10:55:58 +02:00
seq aconnect: Show sequencer sound card numer/PID via aconnect 2016-03-09 09:15:43 +01:00
speaker-test speaker-test: fix option ordering 2015-09-17 21:49:09 +02:00
topology topology: Add command line topology tool to build topology binaries 2015-08-04 17:45:07 +02:00
utils Changed Jaroslav Kysela's e-mail from perex@suse.cz to perex@perex.cz 2007-10-15 10:25:17 +02:00
.gitignore Update .gitignore 2016-02-03 08:50:28 +01:00
acinclude.m4 fixed for the recent autoconf. 2004-01-26 15:57:37 +00:00
ChangeLog update build tools. 2005-08-13 16:27:59 +00:00
configure.ac Release v1.1.1 2016-03-31 16:37:02 +02:00
COPYING Updated COPYING with the recent FSF address 2011-06-03 14:24:30 +02:00
gitcompile configure.in -> configure.ac rename 2014-05-07 10:55:59 +02:00
INSTALL Trivial fixes in INSTALL file 2012-02-13 15:17:45 +01:00
Makefile.am BAT: Add Makefile and configures 2015-10-02 12:42:03 +02:00
README Changed Jaroslav Kysela's e-mail from perex@suse.cz to perex@perex.cz 2007-10-15 10:25:17 +02:00
TODO aplay/arecord 2000-12-27 21:24:57 +00:00

		Advanced Linux Sound Architecture - Utilities
		=============================================

This package contains the command line utilities for the ALSA project.
The package can be compiled only with the installed ALSA driver and
the ALSA C library.

alsaconf	- the ALSA driver configurator script
alsactl		- an utility for soundcard settings management
aplay/arecord	- an utility for the playback / capture of .wav,.voc,.au files
amixer		- a command line mixer
alsamixer	- a ncurses mixer
amidi		- a utility to send/receive sysex dumps or other MIDI data
iecset		- a utility to show/set the IEC958 status bits

You may give a look for more information about the ALSA project to URL
http://www.alsa-project.org.

					Jaroslav Kysela <perex@perex.cz>