{"id":4201,"date":"2010-11-22T00:21:42","date_gmt":"2010-11-21T18:51:42","guid":{"rendered":"http:\/\/www.jeffrin.in\/?p=3874"},"modified":"2010-11-22T00:21:42","modified_gmt":"2010-11-21T18:51:42","slug":"proc-asound-devices","status":"publish","type":"post","link":"https:\/\/www.trueangle.org\/index.php\/2010\/11\/22\/proc-asound-devices\/","title":{"rendered":"proc asound devices 0.2"},"content":{"rendered":"<p><a href=\"http:\/\/www.trueangle.org\/wp-content\/uploads\/2011\/01\/50970-paper1-2.pngwp-content\/uploads\/2010\/11\/pcm-alsa1.png\"><img decoding=\"async\" loading=\"lazy\" src=\"http:\/\/www.trueangle.org\/wp-content\/uploads\/2011\/01\/50970-paper1-2.pngwp-content\/uploads\/2010\/11\/pcm-alsa1.png\" alt=\"\" title=\"pcm-alsa\" width=\"300\" height=\"168\" class=\"aligncenter size-full wp-image-3898\" \/><\/a><\/p>\n<pre>\n$cat \/proc\/asound\/devices\n  2:        : timer\n  3:        : sequencer\n  4: [ 0- 2]: digital audio capture\n  5: [ 0- 1]: digital audio playback\n  6: [ 0- 1]: digital audio capture\n  7: [ 0- 0]: digital audio playback\n  8: [ 0- 0]: digital audio capture\n  9: [ 0- 0]: hardware dependent\n 10: [ 0]   : control\n$\n\n<\/pre>\n<pre>\n\ndevices\n        Lists the ALSA native device mappings.\n<\/pre>\n<pre style=\"padding:10px;\">\nA music  sequencer is  a musical application  or a device  designed to\nplay  back musical  notation. The  original kind  of sequencer  is now\nknown  as a step  sequencer to  distinguish it  from the  modern kind,\nwhich records a musician playing notes.\n\n<\/pre>\n<pre style=\"padding:10px;\">\nGNUsound - A sound editor  for Linux\/x86. It supports multiple tracks,\nmultiple  outputs, and  8, 16,  or 24\/32  bit samples.  It can  read a\nnumber of audio formats through libaudiofile, and saves them as WAV.\n<a href=\"ftp:\/\/ftp.gnu.org\/gnu\/gnusound\/gnusound-0.7.5.tar.bz2\">GNU sound<\/a>\n<\/pre>\n<pre style=\"padding:10px;\">\n\nDigital audio uses pulse-code modulation and digital signals for sound\nreproduction.   This  includes  analog-to-digital   conversion  (ADC),\ndigital-to-analog  conversion  (DAC),  storage, and  transmission.  In\neffect,  the system  commonly  referred to  as  digital is  in fact  a\ndiscrete-time,   discrete-level  analog   of  a   previous  electrical\nanalog. While modern systems can be quite subtle in their methods, the\nprimary  usefulness of  a  digital  system is  the  ability to  store,\nretrieve and transmit signals without any loss of quality.\n<\/pre>\n<pre style=\"padding:10px;\">\nIntel's  use  of  the  phrase  audio codec  refers  to  signals  being\nencoded\/decoded  to\/from  analog  audio  from\/to digital  audio,  thus\nactually a combined audio AD\/DA-converter. This should not be confused\nwith a  codec in  the sense  of converting from  one binary  format to\nanother,  such as  an audio  (MP3) or  video (Xvid)  codec in  a media\nplayer.\n\n<\/pre>\n<pre style=\"padding:10px;\">\nA timer is a specialized type of clock. A timer can be used to control\nthe  sequence of  an  event  or process.  Whereas  a stopwatch  counts\nupwards from zero for measuring elapsed time, a timer counts down from\na  specified   time  interval,  like  an  hourglass.   Timers  can  be\nmechanical, electromechanical,  electronic (quartz), or  even software\nas  all  modern  computers  include  digital timers  of  one  kind  or\nanother. When  the set period  expires some timers simply  indicate so\n(e.g.,  by  an  audible   signal),  while  others  operate  electrical\nswitches, such as a time switch, which cuts electrical power.\n\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>$cat \/proc\/asound\/devices 2: : timer 3: : sequencer 4: [ 0- 2]: digital audio capture 5: [ 0- 1]: digital audio playback 6: [ 0- 1]: digital audio capture 7: [ 0- 0]: digital audio playback 8: [ 0- 0]: digital audio capture 9: [ 0- 0]: hardware dependent 10: [ 0] : control $ &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/www.trueangle.org\/index.php\/2010\/11\/22\/proc-asound-devices\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;proc asound devices 0.2&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[436,653,1035,1298],"_links":{"self":[{"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/posts\/4201"}],"collection":[{"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/comments?post=4201"}],"version-history":[{"count":0,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/posts\/4201\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/media?parent=4201"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/categories?post=4201"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/tags?post=4201"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}