audio recording program

I. Principles In Linux, recording-reads data from the dsp device and playing-writes data to the dsp device. The Development Board uses the sound card UDA1341 to implement audio codec and complete A/D and D/A conversion. The figure below shows the connection between the chip UDA1341 and the CPU: To achieve full duplex, two DMA channels are required for data transmission. Taking

Android audio and video goes deep into an AudioRecord recording to generate pcm into wav (with source code download), androidaudiorecord This project address is named AudioRecord recording (can be paused, convert pch to wav ).Https://github.com/979451341/Audio-and-video-learning-materialsHere is an official description

Research on Network Speech Communication Technology AbstractThis article describes the use of computer sound recording and Playback Technology, as well as the method of data transmission over the network, and combined with an instance to design a network voice communication program.KeywordsNetwork Communication, sound recording, sound playback, and GSM 610 voice compressionNetwork voice c

1. Import #import 2. Implementation Protocol e.g. @property (nonatomic, strong) Avaudiorecorder *audiorecorder; @property (nonatomic, strong) Avaudioplayer *audioplayer; Path of audio files saved after recording -(Nsurl *) audiorecordingpath{ Nsfilemanager *filemanager = [[Nsfilemanager alloc] init]; Nsurl *documentsfolderurl = [FileManager urlfordirectory:nsdocumentdirectory indomain:nsuserdomainmask

Recording://Audio sessionAvaudiosession *session = [Avaudiosession sharedinstance];Nserror*sessionerror;/*avaudiosessioncategoryplayandrecord: Recording and playback avaudiosessioncategoryambient: for non-voice-focused apps, mute with mute key and screen off. Avaudiosessioncategorysoloambient: Similar to the avaudiosessioncategoryambient difference is that it sto

. Call Mediarecorder's prepare () method to prepare the recording.7. Call the Start () method of the Mediarecorder object to begin recording.8When recording is complete, call the Stop () method of the Mediarecorder object to stop recording and call the release () method to release the resource.Note: Steps 3, 42 steps m

("%s:hi_mpi_ai_enableanr (%d,%d) failed with% #x \ n", __function__,\Aidevid, I, S32ret);return hi_failure;}} } The Banren parameter is the input parameter of the function, so the call to find this function can turn on AI noise suppression. Finally found the place to call S32ret = Sample_comm_audio_startai (Aidev, s32aichncnt, Pstaioattr, Gs_baianr, gs_pstairesmpattr); That is, GS_BAIANR determines whether to turn on noise suppression. Continue to find static Hi_bool Gs_baianr = Hi_false; Disco

. Perform analysis: Recording: the mic is sent to codec and converted to a digital signal through the ADC. It is stored in the first-in-first-out (FIFO) of the CPU through the ac97 interface in pending 2, and transferred to the memory through the DMA Interface in pending 1, the snd_pcm_readi interface in alsa_lib to be continued 3 is passed to the recording software and encoded to form an

); Setcontentview (r.layout.main);//Get two buttons in the program interface record = (ImageButton) Findviewbyid (r.id.record); stop = (ImageButton) Findviewbyid (r.id.stop);//Click event Binding Listener Record.setonclicklistener (this) for two buttons, Stop.setonclicklistener (this);} @Overridepublic void OnDestroy () {if (soundfile! = null soundfile.exists ()) {//Stop recording mrecorder.stop ();// Rel

This project address, name is Audiorecord recording (can pause, convert PCH to WAV), for starHttps://github.com/979451341/Audio-and-video-learning-materialsFirst, the official description.1.AndioRecord Approximate descriptionThe main function of the Andiorecord class is to enable various Java applications to manage audio resources so that they can record sound co

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.

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,

Create empty applicaton and add the homeviewcontroller file. Let's look at the code. The theory is too boring and will be mentioned in the code. Homeviewcontroller. H code:# Import @ End Homeviewcontroller. m code:# Import "homeviewcontroller. H "@ interface homeviewcontroller () @ end @ implementation homeviewcontroller @ synthesize audioplayer; @ synthesize audiorecorder; // set the location of the recorded audio file-(nsstring *) audiorecordingpath

Mediarecorder enables recording and recording. Mediarecorder official instructions: Http://developer.android.com/reference/android/media/MediaRecorder.html When using mediarecorder for recording videos, you must strictly abide by the function call sequence in the API instructions. Otherwise, the video cannot be executed successfully. The following is an example o

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 stor

New empty Applicaton, add Homeviewcontroller file. Just look at the code, it's too boring and the theory will be mentioned in the code.HomeViewController.h code: #import @endNBSP;HOMEVIEWCONTROLLER.M code: #import "HomeViewController.h" @interface Homeviewcontroller () @end @implementation Homeviewcontroller @synthesize Audioplayer; @synthesize Audiorecorder; //Setting the location of recorded audio files-(NSString *) audiorecordingpath{ nsstri

can view the site: "Android Multimedia how-to Summary (audio, video, recording, etc.)", "Android Development introduction and Advanced Course", "Android view summary of the tips", " The activity Operation skill summary of Android programming, "Android operation SQLite database Skill Summary", "Android operation JSON format Data technique summary", "Android database Operation skill Summary", "Android File O

The Microphone access class provided by Windows Phone is Microsoft. Xna. Framework. Audio. Microphone, which belongs to the XNA Framework. This class is also required to access the Windows Phone Microphone in Silverlight. Therefore, you must add a reference to Microsoft. Xna. Framework.1. Declare local variables to obtain the microphone Singleton. // Mic SingletonPrivate Microphone microphone = Microphone. Default;// Capture the

Android multimedia audio and video recording MediaRecorderOverview: MediaRecorder status chart:Initial: Initial state. When a MediaRecorder object is created using the new () method or the reset () method is called, The MediaRecZ prepare? Http://www.bkjia.com/kf/ware/vc/ "target =" _ blank "class =" keylink "> vcmRlcrbUz/examples/templates + SW5pdGlhbGl6ZWSjutLRs/templates + templates/ release/bOxLz + relea

to prepare are set parameters. You can also set other parameters to view the differences. Prepare means that the recording device starts to prepare to capture the data of the input device and encode the data. This means that everything is ready, just wait for the first moment. For the specific code of prepare, see: /** * Prepares the recorder to begin capturing and encoding data. This method * must be called after setting up the desired