pitch-shifting

问题 Terminating app due to uncaught exception 'com.apple.coreaudio.avfaudio', reason: 'required condition is false: node != nil' AVAudioFile *file=[[AVAudioFile alloc] initForReading:_recordedvoice error:nil]; AVAudioFormat *format=file.processingFormat; AVAudioFrameCount capacity= (AVAudioFrameCount)file.length; AVAudioPCMBuffer *buffer=[[AVAudioPCMBuffer alloc] initWithPCMFormat:format frameCapacity:capacity]; [file readIntoBuffer:buffer error:nil]; [playerNode scheduleBuffer:buffer

问题 My group is developing a simple MATLAB Graphical User Interface (GUI) that is supposed to record audio from a microphone - plugged in or built in to the computer - and play back the signal. So far we have that completed. Our GUI also can load a sample (a .wav file, etc..) and play it back using the same "Play" pushbutton on the GUI. We have a Play, Record, Load, and Save push button. Now for the pitch-shifting of loaded or recorded samples... We know we need a peak-picking algorithm to find

问题 My group is developing a simple MATLAB Graphical User Interface (GUI) that is supposed to record audio from a microphone - plugged in or built in to the computer - and play back the signal. So far we have that completed. Our GUI also can load a sample (a .wav file, etc..) and play it back using the same "Play" pushbutton on the GUI. We have a Play, Record, Load, and Save push button. Now for the pitch-shifting of loaded or recorded samples... We know we need a peak-picking algorithm to find

问题 I need to modify pitch or tempo of an audio, but need to do them separately. Is there any example in Android for that or any library which provides support for Android. I want to avoid using NDK/JNI for this, since I am not that good into it. I have already seen Many libraries, although they have a nice tutorial, but I am unable to import them to Eclipse Android project. Help is appreciated :-) 回答1: you could try Tarsos ! Here some cool demo links from Tarsos: http://0110.be/posts/Phase

问题 I'm able to change the pitch and speed of my audio but I'm getting problem in saving the audio with changed pitch and speed //this is method which set the pitch [self.audioEngine connect:audioPlayerNode to:timePitchEffect format:nil]; [self.audioEngine connect:timePitchEffect to:self.audioEngine.outputNode format:nil]; [audioPlayerNode scheduleFile:self.audioFile atTime:nil completionHandler:nil]; [self.audioEngine startAndReturnError:&audioEngineError]; NSLog(@"%@",self.audioFile.url); if

问题 I am using the NAudio DLL and I am looking for example code for pitch shifting sound. 回答1: There is an example of using NAudio for pitch shifting in the open source Skype Voice Changer project. See my article on Coding4Fun for more information on the project. The pitch shifter code itself is found in the SuperPitch class. 来源： https://stackoverflow.com/questions/5843413/naudio-pitch-shifting

问题 I am trying to integrate soundtouch library for change in pitch and playback rate of wav audio file. But when i add it in the project the an error arising which is given belo Information:Gradle tasks [:app:assembleDebug] /home/qwork/Android/android-ndk-r17/build/core/init.mk Error:(537) * Android NDK: Aborting... . Stop. Error:(537) * Error:(537) *** Information:BUILD FAILED Information:Total time: 14.586 secs Information:3 errors Information:0 warnings Information:See complete output in

问题 I want to create an audio file using the existing audio file by which I can modify the pitch of the audio for different durations of the file. Like if the file is of 36sec then I want to modify the pitch for 1st 2 sec with some value then from 6th sec to 9th sec some other value and so on .. Basically, I am trying to modify the audio file based on the text message that user gives like say if user inputs "kill bill" , according to each character in the message k,i,l,b .. i have taken an array

问题 I'm working on recording the voice then change the pitch of the audio and save. I call this method after recording the voice and click on the button to change the pitch then the new file is also created but the not not able to listen the audio the audio is generated with out voice what may be the error? -(void)saveEffectedAudioToFolder { NSError *error; if (_audioEngine) { AVAudioUnitTimePitch *pitchEffect = [AVAudioUnitTimePitch new]; pitchEffect.pitch = pitch; AVAudioFormat * commonFormat =

问题 I'm new in Android development. I'm looking for any method that applies pitch shifting to output sound (in real-time). But I couldn't find any point to start. I've found this topic but I still don't know how can I apply this. Any suggestions? 回答1: In general, the algorithm is called a phase vocoder -- searching for that on the Internets should get you started. There are a few open source phase vocoders out there, you should be able to use those for reference too. You can do phase vocoder in