ccna audio

In a big aspect, the android audio system architecture has not changed much compared with Android. The analysis of the audio architecture of 2.2 still applies to 2.3. Many people have already elaborated on this aspect in detail and I will not repeat it here. The storage location of files in each module has changed, so you need to understand this. 1. A major improvement is the introduction of the mixable

Transferred from: http://www.cnblogs.com/javawebsoa/archive/2013/05/20/3089511.htmlThe students who have been in touch with iOS audio development know that core audio is the basis for the digital audio processing of iOS and MAC, which provides a set of software frameworks that the application uses to process audio, and

*/public static final int stream_ring = 2; /* Ringtones and SMS Tips */public static Final intstream_music = 3; /* Music Playback */public static Final intstream_alarm = 4; /* Alarm Bell */public static Final intstream_notification = 5; /* Notify Sound *//* The following are hidden types, not open for upper application */public static Final Intstream_bluetooth_sco = 6; /* Call when connecting to Bluetooth */public static Final intstream_system_enforced = 7; /* Mandatory system sounds, such as t

1. The principle of audio and video synchronization 2. A more positive method for audio and video synchronization 3. Audio and video synchronization problems encountered Disclaimer: All content Below is reproduced 1. Original from: http://bbs.chinavideo.org/viewthread.php?tid=1183extra=page%3D1%26amp%3Bfilter%3Ddigestpage=1 The following sections are posted:

1. The principle of audio and video synchronization 2. A more positive method for audio and video synchronization 3. Audio and video synchronization problems encountered Disclaimer: All content Below is reproduced 1. Original from: http://bbs.chinavideo.org/viewthread.php?tid=1183extra=page%3D1%26amp%3Bfilter%3Ddigestpage=1 The following sections are posted:

BasisLet's take a quick look at some basic audio knowledge.At present, we need to rely on audio files for audio playback on the computer, audio file generation process is the sound information sampling, quantization and encode the digital signal generated by the process, the sound that the human ear can hear, the lowes

Android calls the built-in recording audio program Android has its own Audio recording program. You can specify an Action MediaStore. Audio. Media. RECORD_SOUND_ACTION Intent. Start it. Then, in the onActivityResult () method, retrieve the Intent Data, which is the URI of the recorded audio. Java code: Copy codeThe Co

1. Audio and videoVideo on the WebUntil now, there is still no standard for displaying video on a Web page.Today, most videos are displayed via plugins (such as Flash). However, not all browsers have the same plugin.HTML5 provides a standard way to include video through the visual element.Video FormatCurrently, the video element supports three types of videos:Format IE Firefox Opera Chrome SafariOgg no 3.5+ 10.5+ 5.0+ NoMPEG4 9.0+ No no 5.0+ 3.0+WebM

Today see very good introduction audio development articles, reproducedOriginal address: http://msching.github.io/blog/2014/07/07/audio-in-ios/PrefaceMusic-related app development has been for some time, in the process of the app's player several changes I also therefore for iOS audio playback implementation has been a certain research. Write this series of blog

Record: Question: How can I play a WAV, WMA, or MP3 audio in wince? What is the specific function? I use playsound (text ("\ Sounds \ bell.wav "), null, snd_sync | snd_nodefault); why not? I put \ Sounds \ bell.wav directly under the root directory of the project folder. After I remove snd_nodefault, I only play a "beep" sound. It is estimated that it is a system sound. You can also use sndplaysound () to answer the same question. Why: if you can play

Audio BasicsWhat are the important attributes of sound? Loudness (loudness) Loudness is the size of the various sounds that humans can perceive, that is, the volume. Loudness is directly related to the amplitude of sound waves. Tone (Pitch) The tone is related to the frequency of the sound, and the greater the frequency of the sound, the higher the tone the human ear perceives, or the lower it will become. Tone (Qu

I. Basic Concepts 1 bit rate: the number of bits required for encoding (compression) audio data per second. The unit is usually kbps. 2. Sound Intensity: the subjective attribute of a sound indicates the degree to which a sound is heard. The intensity of the sound changes, but it is also affected by the frequency. In general, the intermediate frequency pure audio is better than the low frequency and hig

Go from Android 4.1 audio system Change instructions to Android 4.1, English code abbreviation for JB. In the eyes of the Chinese people, the word jb is also a little related to animals. Google so frequently modified Android, finally launched a can be all day jb JB hanging in the mouth of the version. Later my article can also use JB to express the version number, one side with JB said Chairman Mao often said "strategic contempt." Please, according to

Li pengjun, Android Project Director of AI totem, finalized the speech subject: Android audio Port Data Communication Development Topic Introduction: Li Peng will explain how to implement bidirectional communication between audio ports and external devices based on Android audio interfaces based on the development practices of AI totem and hardware. Personal Pr

By default, the sampling rate of Android sound is fixed to 44.1 kHz, and the recording sampling rate is fixed to 8 kHz, therefore, the underlying audio device drivers only need to set these two fixed sampling rates. If the sampling rate transmitted from the upper layer does not match the sampling rate, the android framework layer performs resample processing on the audio stream. The resample process is as f

Android calls your own recorded audio program Android has its own audio recording program, we can specify an action MediaStore.Audio.Media.RECORD_SOUND_ACTION intent to Just start it up. Then, in the Onactivityresult () method, get the intent data, which is the corresponding URI of the recorded audio. Java code: Copy Code code as follows: Package Eo

C Language resolution WAV audio file code address: Github:github.com/casterwx/c-wave-master Directory Objective Understanding WAV Audio Files What is a binary file Binary format parsing of WAV C language parsing WAV audio files Two details Summarize In the computer has a variety of files, such as EXE executable file, jpg This image fil