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Description: 其中sound.c 用于录音和回放。其中特别需要注意的是:1。目前声卡似乎不能打开全双工，所以如果fd = open(\"/dev/dsp\", O_RDWR) ，则无法录音和回放。只能分别设置RDONLY和WRONLY。即半双工方式。否则，就是在录音的时候可以听见，但是无法回放。分析下来似乎是IIC总线中只分配了一个通道给声卡，或者是只启用了一个通道，所以无法录音和放音同步进行。解决方法就是分别以RDONLY方式打开进行录音和WRONLY方式打开进行放音。
Sound1.c用于将录音保存在test.wav文件中，并利用cast test.wav > /dev/sound/dsp回放文件。此处需要注意的是，录音频率必须是44100才能正确回放。否则就会出现类似快放的效果。分析应该是cast方式利用了dsp的默认播放频率44100，所以如果录音的时候低于这个频率，这放的时候就会快放。
此外，设置采样率的时候必须设置成16bit，否则会提示出错。原因尚不知道，估计是与声卡有关。
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Size: 3051 |
Author: 杨浩 |
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Description: sound LINUX qt the functional integrity standardized format
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Size: 45275 |
Author: 叶林 |
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Description: devloped under vxwork, support ess sound card. driver library, include datasheet.
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Size: 1058781 |
Author: Donghua Gu |
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Description: sound touch ,change sound pitch ratio etc.
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Size: 464649 |
Author: lv_fan@eyou.com |
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Description: KDVoicePhone Toolkit开发工具可以使你的应用程序获得声音和电话方面的特性，如：a.. 打电话或回电话；b.. 如果对话已经在进行，可以中途接听；c.. 在电话线或声卡中回放和记录音频；d.. 从电话线中检测音频信号和脉冲信号；e.. 捕获呼叫方ID；f.. 可控制本机听筒，外部的麦克风和MODEM的外部喇叭；g.. 定时事件来跟踪回放和录音的过程；h.. 录音时可检测静音；-KDVoicePhone Toolkit development tools can make your application access to voice and telephone features, such as: a.. Call or return phone calls b.. If the dialogue already under way, you can receive half-way c.. In a telephone line or sound card in audio playback and recording d.. from the telephone line in the detection of audio signals and pulse signal e.. capture caller ID f.. can control the local handset, external microphones and MODEM external speakers g. . timing incident to track the process of playback and recording h.. recording can detect mute
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Size: 1662976 |
Author: 站长 |
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Description: lattice sdram 控制器VHDL源代码-Sound code of Lattice Sdram Controller based on VHDL
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Size: 180224 |
Author: 刘汉忠 |
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Description: 又一个DirectSound实现混音的例子- A DirectSound realization mixes the sound the example
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Size: 62464 |
Author: none |
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Description: -C语言中使用PC喇叭发声 -个人成绩管理(图形菜单)--C language used in PC speaker sound- Personal performance management (graphics menu)
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Size: 9216 |
Author: 王坤侠 |
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Description: linux 下声卡驱动程序的编写-sound card driver under preparation
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Size: 235520 |
Author: 中中地 |
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Description: 8255参考设计VHDL源代码-The sound code of 8255 reference design based on VHDL
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Size: 226304 |
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Description: 控制计算机音量的简单的例子-control of the computer sound simple example
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Size: 4096 |
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Description: brew中声音控制。-Sound control in brew
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Size: 304128 |
Author: 彭彭 |
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Description: Direct Sound音频采集和混音实现-Direct Sound mixing audio collection and achieve
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Size: 61440 |
Author: 陈登封 |
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Description: Direct Sound放音程序代码-Direct Sound of audio code
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Size: 14336 |
Author: 陈登封 |
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Description: 用VC编写的一款语音接口组件，便 于大家开发语音程序-prepared by the VC one voice interface components, we facilitate the development of voice procedures
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Size: 225280 |
Author: 巫升华 |
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Description: directx 8的音频混合程序,vb6,dx8-DirectX 8 audio mixing procedures, VB6, dx8
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Size: 69632 |
Author: 的 |
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Description: 本例可以对声音文件进行一般的处理的，如录制，播放，查找和存储。(fister)-This Example for Editing Wave file, like record sund, play wave, search sound and save to disk.
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Size: 132096 |
Author: 全秀 |
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Description: 用键盘模拟发生程序，通过按下不同的按钮通过声卡发出不同频率的声波，类似钢琴发生的小程序-keyboard simulation occurred procedure by pressing the button a different card issued by the different frequency sound waves, similar to the small piano procedures
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Size: 595968 |
Author: 东方 |
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Description: 一个声音频谱分析的小程序，用VB编写。希望对大家有所帮助-a sound spectrum analysis of the small program in Visual Basic. We hope to help
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Size: 34816 |
Author: 张楠 |
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Description: 十分简洁的JAVA压缩类例子注释什么的都十分完善十分适用于傻瓜教学-very simple JAVA compression type examples of what Notes are very sound teaching applies to fool
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Size: 1024 |
Author: 这样真是 |
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