audacity audio recording

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

Use a third -party lame ,Mp3 Audio encoder.Before using Avaudiorecorder for audio recording, set the parameters:NSString *recordtemporarypathstring = [NSString stringwithformat:@ "%@/temporary", Self.audiotemporarysavepath];LINEARPCM is a lossless encoding format for iOS, but it's bulkyRecording settingsNsmutabledictionary *recordsettings = [[Nsmutabledictionary

Starting from anychat r4086, anychat supports audio synthesis and stereo recording and adds the recording mark constant: VaR brac_record_flags_stereo = 0x00000200; // Copy code The call code is: VaR flags = brac_record_flags_video + brac_record_flags_audio + brac_record_flags_mixaudio + brac_record_flags_mixvideo + brac_record_flags_stereo; Brac_streamreco

This article illustrates a simple way to call pictures, video, audio, recording, and photographing in Android. Share to everyone for your reference, specific as follows: Select the logo returned by the picture Requestcode Intent innerintent = new Intent (intent.action_get_content); "Android.intent.action.GET_CONTENT" Innerintent.settype (ContentType); View type String image_unspecified = "image/*"; In

REALPLAYER11 supports playback in a variety of online media videos, including flash, FLV format or MOV format, and so on, and can record video during playback. Also joined the online video's one-click Download function to the browser, support IE and Firefox, so you can download YouTube, MSN, Google video and so on online videos to the local hard drive to watch offline. RealPlayer11 can record any audio and video in playback to the Media Library. Can

To record audio steps using Mediarecorder:Create a Mediarecorder objectCall Mediarecorder's Setaudiosource () method to set the sound source, the general incoming MediaRecorder.AudioSource.MIC parameter specifies that the sound is recorded from the microphoneCall the Setoutputformat () setting of the Mediarecorder object to format the recorded audio fileCall the Mediarecorder object's Setaudioencoder (), se

Mobile phones typically offer microphone hardware, and the Android system can use that hardware to record audio.To record audio in Android apps, Android provides the Mediarecorder class and the process of recording audio using Mediarecorder is as follows:1. Create a Mediarecorder object.2. Call the Setaudiosource () method of the Mediarecorder object to set the s

User-free, time-long audio recording using the microphone class in Unity Master Recording Script AudioRecord.csMaxcliplength: Maximum audio length, do not exceed the length of the actual recording, or set the maxcliplength infinite size can also Using Unityengine; Using Uni

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

From: http://www.linuxidc.com/Linux/2009-08/21427.htm Reference material: Page number: p186 You can write an audio file into the device file of the sound card to play the audio file. Using the READ function to read the content in the sound card device file can enable the recording function. The program code below realizes the

android-mediarecorder-Audio Recording-Warning-w/mediarecorder (13811): Mediarecorder went away with unhandled eventsAudio recording stop, logcat print the warning above, plus code " mmediarecorder.reset (); "Just OK." Mmediarecorder.stop (); Mmediarecorder.reset (); Mmediarecorder.release (); Mmediarecorder = null;an

. Mbufferinfo.presentationtimeus = Getptsus (); Muxer.writesampledata (Mtrackindex, Encodeddata, Mbufferinfo); Prevoutputptsus = Mbufferinfo.presentationtimeus; }//return buffer to encoder Mmediacodec.releaseoutputbuffer (Encoderstatus, false); if (Mbufferinfo.flags mediacodec.buffer_flag_end_of_stream)! = 0) {//when EOS come. Miscapturing = false; Break Out of a while}}}} After finishing, the code is many,

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.

-up recording page-(void) addaudioview{self.navigationItem.rightBarButtonItem.enabled = NO;_backview = [[UIView alloc]initwithframe:cgrectmake (0, 0, WIDTH, HEIGHT)];_backview.alpha = 0.5;_backview.backgroundcolor = [Uicolor blackcolor];[Self.view Addsubview:_backview];_audioview = (Audiorecorderalterview *) [[[NSBundle mainbundle]loadnibnamed:@ "Audiorecorderalterview" Owner:nil Options:nil]lastobject];_audioview.frame = CGRectMake (0, 64, 200, 200);

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

IOS crazy explanation-converting recording audio into Mp3 Use a third partyLame,Mp3Audio Encoder. Before using AVAudioRecorder for audio recording, set the parameters: NSString * recordTemporaryPathString = [NSString stringWithFormat: % @/temporary, self. audioTemporarySavePath];// LinearPCM is a lossless encoding for

(Kaudiosessionproperty_audioroutechange, Proplistener, (__bridge void*) self) ; if (error) printf ("Error ADDING AUDIO SESSION PROP listener! %d\n ", (int) error); UInt32 inputavailable = 0; UInt32 size = sizeof (inputavailable); We don't want to allow recording if input are not availabLe error = audiosessiongetproperty (kaudiosessionproperty_audioin

Compared with mediarecorder, The audiorecord class is closer to the underlying layer and has fewer encapsulated methods. However, the audio recording program that implements an audiorecord is also very Simple. The sample code is as follows: It is a pity that there is a problem in this instance testing. During recording, there will be buffer over. Cache leakage t

The general sound visualization makes the spectrum map on the line:But I don't think the spectrogram can see what the sound is, so be sure to make a sonogram, both of which get information about the frequency of the sound.This paper studies the two examples of Auriotouch and Pitchdetector on the official web, and integrates the main code obtained by Auriotouch's audio-visual display and pitch detector frequency to the previous section "OC Development

: [nsstring stringwithformat: @" % @/Recordtest. CAF " , [[Nsbundle mainbundle] resourcepath]; nserror * Error = Nil; audiorecorder = [[Avaudiorecorder alloc] initwithurl: URL settings: recordsetaskerror : Error]; If ([Audiorecorder preparetorecord] = Yes) {[audiorecorder Record];} Else { Int Errorcode = Cfswapint32hosttobig ([error code]); nslog ( @" Error: % @ [% 4.4 S]) " , [Error localizeddescription], ( Char *) Errorcode);} nslog ( @" Recordi