devices. This series of blog posts only discuss ALSA-driver and ALSA-SOC in embedded systems. Ii. ALSA device file structure
Let's start our ALSA journey from the device file structure of ALSA in Linux. Let's take a look at the structure of the device file of the Alsa driver in my computer:
$ CD/dev/SND$ LS-l
CrW-RW ---- + 1 root audio 116, 8 controlc0CrW-RW ---- + 1 root audio 116, 4 midic0d0CrW-RW ---- + 1 root audio 116, 7 pcmc0d0cCrW-RW ---- + 1 root audio 116, 6 pcmc0d0pCrW-RW ---- + 1
Please note: Before adjusting, please make sure your computer has a built-in microphone, the sound card driver is properly installed, and please temporarily turn off QQ or other software that needs to call the microphone before adjusting.
The sound card driver name is Realtek high Defenation Audio
Can be seen in the
How to Set Realtek HD sound card in VISTA/WIN7, hdwin7
Now more and more people are using VISTA and win7 systems, and most of them are Realtek HD sound cards. The setup problems are quite different from those of Windows XP systems, next I will introduce some experiences in setting a sound
Right-click on "My Computer"----"Properties"---"Hardware"----"Device Manager", expand "sound, video and game controllers" to see if there is a yellow "?" in front., there is a lack of sound card driver, no, that the sound card driver can not be used properly, right-click the
First in the YY interface to select the sound card settings
Select a different sound card in the sound input and output and speak to the effect
Double-click on the lower right corner of the system's small horn, select the attributes in the option
Put all the volume contro
Recently, we are experiencing a great dealEt voice chat software, Http://et.sdo.com/feel et (easy to chat) voice sound quality is quite good, there are low sound quality (8 kHz voice) and high quality (kge 44.1 kHz stereo). You can download this software to experience it.
Nowadays, there are a lot of software related to network speech, which is favored by the majority of children in the 90 s. When you are
Article Title: summary of how to install the sound card driver in Linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
Install the Linux OS several times and the Sound card driver
Take the old style innovation SB Live5.1 version For example (Innovation Other series sound card can also refer to Settings)
1. First install the hardware of the sound card this thing is inserted in the computer motherboard PC slot (and network card parallel to the 3 slots
Since recently received a lot of netizens asked about the Win7 sound card settings, the following days inside the small series in particular to carry out the introduction of Win7 sound card settings, today to give you a detailed introduction about how to release the volume of HD so
The system does not recognize the sound card after installing a sound card to the computer. This is mostly because the sound card is not installed, or the sound
HP notebook installed after the Debian system, voice problems, most of the sound card driver failure, at this time can be reinstalled to install the sound card driver to solve the problem, the following small series to give you a detailed introduction to the next Debian compiled installation
First, introduce what is ALSA;The Advanced Linux sound Architecture is referred to as ALSA, which translates into Chinese in the form of a state-of-the-art Linux audio architecture (this is Google Translate); when it comes to architecture it's a bit too large, so ALSA not only includes support and drivers for sound cards;ALSA has the following characteristics:1, the efficient support for all audio interface
If more than one screen, a game to see a movie, and then the game sounds and movies separate output, you can use a dual sound card to complete this function. The general motherboard will bring a onboard sound card, and then you can add a PCI or USB independent sound
How to use:
1, the speaker connected to the computer USB interface, under normal circumstances, after the USB speaker, the computer will automatically switch the sound card to this USB sound card, if the system does not switch to reboot speakers to try, if the reboot or did not switch over, then click on the system tr
If more than one screen, a game to see a movie, and then the game sounds and movies separate output, you can use a dual sound card to complete this function. The general motherboard will bring a onboard sound card, and then you can add a PCI or USB independent sound
Some WinXP users who use Conexant HD sound card chip find that it is impossible to install the sound card driver successfully in their notebooks. Today small make up with everyone to share the solution of this problem, the following is the specific procedures.
Workaround:
1. Need to install a
Sometimes, we feel that integrated sound is not good, at this time, we want to install a sound card
1, first in Taobao to buy a sound card, there is a USB interface, directly inserted on the use, today we want to use PCI-E slot independent
Laptop installed sound card driver error no appropriate Driver to be installed
Cause Analysis:
There are Realtek and conexant two kinds of sound cards, when the system can not automatically identify the device when there will be an error.
Solution:
Enter the corresponding folder double-click Setup to install the driver
If Realtek's
I. Analyze the driver and change the code according to the Development BoardCode is too long, it is not affixed, a few points to note:1, view the Development Board schematic diagram and s3c2410 datasheet,uda1341 l3mode, L3data, L3clock respectively and s3c2410 GPB2, GPB3, GPB4 connected. IISLRCK=GPE0, Iissclk=gpe1, Cdclk=gpe2,iissdi=gpe3, Iissdo=gpe4, part of the code such as the following:2, two important structures: audio_buf_t and audio_stream_t, in which audio_stream_t composed a ring buffer
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