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linuxaudio [2015/05/20 04:46] slackermedia [4. Set Up Kmix] |
linuxaudio [2021/06/03 19:48] (current) |
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| - | [[{arrowp.png|border:0;background:none;width:0;display:inline-block;position:absolute;top:0;left:0;}user|]] | ||
| - | [[{arrown.png|border:0;background:none;width:0;display:inline-block;position:absolute;top:0;margin-left:2.5em;}pkg|]] | ||
| ====== Understanding Linux Audio ====== | ====== Understanding Linux Audio ====== | ||
| + | |||
| + | <WRAP info> | ||
| + | **TL;DR** \\ | ||
| + | -Identify Physical Devices | ||
| + | -Identify Sound Cards | ||
| + | -Map Sound Devices to their Controls | ||
| + | -Set Up Kmix | ||
| + | </WRAP> | ||
| Traditional Linux (such as Slackware, and as opposed to something more progressive like [[http://redhat.com|Red Hat]] and [[http://getfedora.org|Fedora]]) deals with audio in its own unique way. This can be confusing to new users, or to experienced users who have never thought about it. It confuses people because almost no where in the audio schema is there a one-to-one mapping; you must think of audio processing in the computer as a series of rivers or streams, flowing from one or two sources internally, branching off one other for adjustment, and then re-joining at the end to deliver sound in the physical world. | Traditional Linux (such as Slackware, and as opposed to something more progressive like [[http://redhat.com|Red Hat]] and [[http://getfedora.org|Fedora]]) deals with audio in its own unique way. This can be confusing to new users, or to experienced users who have never thought about it. It confuses people because almost no where in the audio schema is there a one-to-one mapping; you must think of audio processing in the computer as a series of rivers or streams, flowing from one or two sources internally, branching off one other for adjustment, and then re-joining at the end to deliver sound in the physical world. | ||
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| type plug | type plug | ||
| slave.pcm "dmix" | slave.pcm "dmix" | ||
| + | } | ||
| </code> | </code> | ||
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| Since Slackermedia cannot know your requirements, it's up to you to determine your ideal control scheme, but the first step is to understand which volume slider controls which sound port. The most efficient way to investigate this is ''alsamixer'', which, unlike ''Kmix'' displays, for better or for worse (and for this use, it's better) every possible volume slider all in one screen. | Since Slackermedia cannot know your requirements, it's up to you to determine your ideal control scheme, but the first step is to understand which volume slider controls which sound port. The most efficient way to investigate this is ''alsamixer'', which, unlike ''Kmix'' displays, for better or for worse (and for this use, it's better) every possible volume slider all in one screen. | ||
| - | {{ :alsamixer.png?direct&660 |}} | + | {{ :alsamixer.png?direct&666 |}} |
| To begin, set up your speakers as you intend to use them, and have headphones (or something with a 1/8" (3.5mm) audio jack) on hand. Press ''F6'' on your keyboard to select the audio card you want to control and select the appropriate card. | To begin, set up your speakers as you intend to use them, and have headphones (or something with a 1/8" (3.5mm) audio jack) on hand. Press ''F6'' on your keyboard to select the audio card you want to control and select the appropriate card. | ||
| - | {{ :alsamixerselect.png?direct&660 |}} | + | {{ :alsamixerselect.png?direct&666 |}} |
| - | Start some sound playing in whatever media player you have on hand (by default, ''mplayer'', ''audacious'', ''xmms'', ''Dragon'', ''Juk'', and ''Xine'' will have been installed). If you have no sound to play, download a free [[http://aesdiopod.com/lester/|Fat Chance Lester]] album (ogg version, to ensure compatibility with the pre-installed media players). | + | Launch ''System Settings'' from the ''K-Menu'' and navigate to the ''Multimedia'' panel. In the ''Multimedia'' panel, promote the card that you want to use as default to the top of the list on the right, and click the ''Test'' button at the bottom of the panel. The ''Test'' button plays a sound that should be audible when you raise the volume of the appropriate device. |
| + | |||
| + | {{ multimediaav.png }} | ||
| + | |||
| + | |||
| + | <WRAP important> | ||
| + | If you are not sure what device to promote to the top, check the output of ''aplay -l'' again. In this example, notice that the default analog ''card0'' listed by ''aplay -l'' is ''ALC887-VD Analog'', and the port promoted in the ''Multimedia'' panel is the same. | ||
| + | </WRAP> | ||
| Using the ''left'' and ''right'' arrow keys to navigate to each control, the ''up'' and ''down'' arrow keys to raise or lower the volume, and the ''m'' key to mute or unmute the device, see which volume slider effects which device. | Using the ''left'' and ''right'' arrow keys to navigate to each control, the ''up'' and ''down'' arrow keys to raise or lower the volume, and the ''m'' key to mute or unmute the device, see which volume slider effects which device. | ||
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| </WRAP> | </WRAP> | ||
| + | ==== Hijack ==== | ||
| + | |||
| + | If you want to record everything you hear from your computer speakers from a system-wide perspective, refer to [[parecord|parecord]] | ||
| ===== Outboard Gear ===== | ===== Outboard Gear ===== | ||
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| - | [[{arrown.png|border:0;background:none;width:0;display:inline-block;float:right;}pkg|]][[{arrowp.png|border:0;background:none;width:0;float:right;}user|]] | + | <WRAP centeralign> |
| + | <wrap fa>[[user|R]]</wrap> <wrap fa>[[start|S]]</wrap> <wrap fa>[[audiotrouble|Q]]</wrap> | ||
| + | </WRAP> | ||