android mediarecorder audio example

interface can be recorded at 8 KHz sampling rate. But in fact, I found that the underlying audio device can also use other sampling rates. For example, if the adclrc of I2S is 44.1 kHz, and the codec register is set to 44.1khz, the sound recorded by the Android Application is normal. The sampling rate set in alsa_default.cpp is 8 kHz, and the setting is success

Android microphone audio sampling and usage Some codes of Android phone microphone sampling are found online. Sample results and functional code of your app: 1. In some apps, You need to obtain and use the audio input of the microphone, for example, a hot skirt; 2. Sampling

Guo XiaoxingWeibo: Guo Xiaoxing's Sina WeiboEmail:[email protected]Blog: http://blog.csdn.net/allenwellsGithub:https://github.com/allenwells Android has maintained an isolated audio stream for playing music, alarms, notification bells, incoming calls, system sounds, call sounds, and DTMF channels, which is the premise that we can control different audio,

This article translated from: http://developer.android.com/training/managing-audio/audio-focus.html It is vital to consider how to interact with multiple potential audio playback programs. To avoid simultaneous playback of each music player, Android uses audio focus to contr

Android 4.1, abbreviated as JB. In Chinese eyes, the word JB is also related to animals. Google modified android so frequently, and finally launched a version that can be put on the mouth of JB all day long. In the future, my articles can also use JB to express the version number, while JB to express what Chairman Mao often said, "Strategic contempt". Please try to understand my mood for writing the word JB

smartphone-frequency scan, recording side gain 20 dB Meizu M9 intelligence Mobile phone-48 KHz frequency scan, recording side gain 20 dB HUAWEI Huawei u8800 smartphone-48 KHz frequency scan Lenovo happy pad Tablet-48 KHz frequency scan Malata Wan Lida zpad T8 Tablet Computer-48 KHz frequency scan Smartq Smart device T10 tablet-48 KHz frequency scan Android adds an audiofinger, which can be simply understood as the standardized plug

LIBCOREAMR library on GitHub, unknown so! Of course, if anyone solves it, you can talk to me!Finally choose the format of MP3! The disadvantage is that the generated audio file is larger than the AMR file! The advantage is that I solved it! Ha haThe following dry code: the first is the Android part, relatively simple, is recorded through the mic MP3 file, and then upload the server!Recording part: Actually

Mediarecord can be used for recording in Android, which is easy to operate. However, it is not professional enough to Process audio. If you want to process audio in real time or encapsulate the audio You can use audiorecord for recording. Here is a piece of code. Audio Recor

Steps to record audio:1. Create a Recording object2. Specify the recording device (initialization status)3. Set the bitrate of recorded audio4. Set the encoding format for recording audio5, set the location of recording audio storage6. Prepare for recording (ready status)7. Start recording8. Stop Recording9. Releasing ResourcesPermission to record a soundState diagram for recording audiopublic class Mediare

Audiopolicyservice, Audiotrack, Audioflinger, Playbackthread, and two audio devices (speakers, headphones). The relationship between them is as follows (especially note that the purpose of this example is simply to illustrate the relationship of these elements, not that the strategy in the diagram is the one used by the Android system):L A Playbackthread output

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

In game development, I learned from materials and books that two formats of playing audio can be used in our game development: MediaPlayer and SoundPool! PS: Of course, there is another JetPlayer, but the format of the file to be played is quite troublesome, so I will not explain it here. If you are interested, you can study it on your own; Run: MediaPlayer and: SoundPool class! What are their advantages and disadvantages? Or, which one is better

the native layer and Java layer copy, improve efficiency(2) More flexibility to control parameters compared to Java APIs(3) because it is C code, it can be done in depth optimization, such as using NEON optimization(4) Code details are more difficult to decompile(5) Others, to be added5. Sample CodeA foreigner (Victor Lazzarini) wrote a nice introduction to the Android OpenSL ES API and gave some sample code, which is linked as follows:https://audiop

Before I developed my iphone, I knew very little about the sound format. I know some of the differences between "wav" and "MP3" sound formats, but I certainly can't tell you exactly what the "AAC", "CAF" sound file is, and how the best way to convert audio files on your Mac is not known.I know that if you want to be a qualified iphone developer, you have to have a basic understanding of sound file data format, conversion, recording, and what

Http://blog.sina.com.cn/s/blog_4d59e3c70100i7ri.html First, you should have a general understanding of sound recording. You need to set the sound data source, output encoding method, output file path, and output file format. One thing to note is that the output file format is equivalent to a capacity. The encoding format must be specified for specific encoding. The same encoding may have different output formats, and the same output format may have different encoding methods. The

that the resources it occupies are released: mediaPlayer. release (); it should be a good practice to perform this operation before dropping an instance. If you have not set MediaPlayer to a loop and the playback has ended, you can restart MediaPlayer through the MediaPlayer. prepare () and MediaPlayer. start () methods. Most of these methods are asynchronous. Therefore, when MediaPlayer. stop () is called, The MediaPlayer. isPlaying () method may take some time to return. Write a test activity

Enable recording and playing on Android 4.4Background since the beginning of ICS, the audio system has undergone great changes. First, alsalib has been abandoned, and then AIO has been adopted. All levels of frameworks have their own characteristics, it is a step away from the Linux Audio Application, forming its own unique a