6 channel sound card

on the acquisition of audio-related technologies.There are several main techniques for audio processing:Capture Microphone InputCollect sound card outputSend audio data to the sound card for playbackmixing multi-channel audio inputsAPI for audio processing on 1.WindowsOn th

-service-0-1 snd-seq-oss Alias sound-service-0-3 snd-pcm-oss Alias sound-service-0-8 snd-seq-oss Alias sound-service-0-12 snd-pcm-oss It looks very complicated, in fact, the above program only needs to replace the fourth, five lines of snd-card-intel8x0 with your sound

sound card is also very simple, just looking for the Linux driver corresponding to DELL1520 has paid some twists and turns, because I am in CERNET, It is very inconvenient to enter the DELL SUPPORT website, therefore, ALSA was used to solve various driver problems. First download three drivers: Ftp://ftp.alsa-project.org/pub/utils/alsa-utils-1.0.15.tar.bz2 Ftp://ftp.alsa-project.org/pub/lib/alsa-lib-1.0.15

The sound card has different classification methods according to different angles, which is briefly described below. Sort by number of digits to the sound card By the number of digits in the sound card, you can divide the

The Win8.1 system installs the sound card to drive Smartaudio does not have the sound to do? Because the sound card driver process Smartaudio is incompatible with the Win8.1 system, there are times when the system has no sound. Af

AWE64 gold cannot work in Server2003. In addition, in order to save resources, Server2003 by default is unable to make the sound card audible, even if you correctly installed the driver. In Windows2003, there is a service called Windows Audio, the default boot state is prohibited, changed to Automatic mode, and then restarted. V. Noise problems A friend often complains that his

card, because there are very few on the market, so we will not discuss it here. Check if necessary # Refer to the related description of this software. " 6. system testing and sound card device adjustment. 1: After editing the/etc/modules. conf file, you need to use the system program to test whether the module can be

sound card. 2, HD Audio HD Audio is the abbreviation for high Definition Audio (high-fidelity audio). Formerly known as Azalia, is Intel and Dolby (Dolby) company launched a new generation of audio specifications. At present, mainly is the Intel 915/925 series Chip Group's ICH6 series South Bridge chip uses. HD Audio is designed to replace the current popular AC ' 97 audio specification, with AC ' 97 ha

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 root audio 116, 5 pcmc0d1pCrW-RW ---- +

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,

performance, resource occupation is no longer a problem. As for the performance, it is also better with the update of the driver!　　 Category:Realtek)Realtek's resource management system (CEN) is the most widely used one, which accounts for about half of the market. I don't want to talk about its performance. You can search for it. This sound card has a special feature, you can automatically detect the inpu

functionality for embedded devices. This series of posts only discusses Alsa-driver and ALSA-SOC in embedded systems.Two. ALSA Device file structureWe started our Alsa journey from Alsa's device file structure in Linux. Look at the ALSA-driven device file structure in My Computer:$ cd/dev/snd$ ls-lCRW-RW----+ 1 root audio, 8 2011-02-23 21:38 controlC0CRW-RW----+ 1 root audio, 4 2011-02-23 21:38 midic0d0CRW-RW----+ 1 root audio, 7 2011-02-23 21:39 pcmc0d0cCRW-RW----+ 1 root audio,

one important concept in ASOC: Kcontrol, unfamiliar readers need to browse through my previous article: Linux ALSA sound card driver Four: control device creation. Typically, a kcontrol represents a mixer (mixer), or a MUX (multi-channel switch), or a volume controller, and so on. As we know from the above article, defining a kcontrol is primarily about defining

driver execution level is too low to compete with other devices for bandwidth caused by, in general, the sound card manufacturers to achieve the stability of the system. This happens very easily when using a PCI video card because the PCI device is competing for bandwidth. 4, may be a sound

installation is not successful mainly in the following two species (pictured below). General sound card Driver normal situation, usually the Device Manager will have "Realtek" "VIA" "IDT" and other sound card brand name, the lack of the prefix of these brand names may drive installation is not successful, there is a c

Article Title: Practical ASUSP4PE-X onboard sound card AC97. 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. From computer access to the present, Windows operating system has been used, in which the installation of

that need to be tuned in the Volume Control Panel in the pop-up window (Figure 2). Similarly, select "Recording" and click on the audio source (Figure 3). After the selection, press "OK" to close the dialog box and return to the "Play Control" panel, the less commonly used sound sources such as line-in, microphone, such as mute, so as to minimize the interference of the sound

Numid = 9, iface = mixer, name = 'sound processing filter' ; Type = enumerated, access = RW ------, values = 1, items = 4 ; Item #0 'Flat' ; Item #1 'minimum1' ; Item #2 'minimum2' ; Item #3 'maximum' : Values = 0 L sound card test ** Playback [Root @ embedsky/mnt] # aplay sound_check.wav Playing wave 'sound_check.wav ': signed 16 Bit little endian, rate 44100H

First, introduce what is ALSA;Advanced Linux Sound architecture abbreviation for ALSA, translated into Chinese means the Advanced Linux sound architecture (this is Google translation); when it comes to architecture, it's a bit too much, so ALSA not only includes support and drive for sound cards;ALSA has the following characteristics:1, the efficient support of a

= s3c24xx_pcm_preallocate_dma_buffer (PCM,Sndrv_pcm_stream_playback );If (RET)Goto out;} If (Dai-> capture. channels_min ){Ret = s3c24xx_pcm_preallocate_dma_buffer (PCM,Sndrv_pcm_stream_capture );If (RET)Goto out;}Out:Return ret;}// PCM instance initialization function and data flow operation functionStruct snd_soc_platform s3c24xx_soc_platform = {. Name = "s3c24xx-audio ",. Pcm_ops = s3c24xx_pcm_ops,. Pcm_new = s3c24xx_pcm_new,. Pcm_free = s3c24xx_pcm_free_dma_buffers,};Export_symbol_gpl (s3c