How to change pitch (samplerate) at run-time with portaudio ? Many thanks.
How to change pitch (sample rate) at run-time with portaudio?
1.8k Views Asked by user2418856 At
1
There are 1 best solutions below
Related Questions in RUNTIME
- How can I fit "ol.Map" to "Ext.panel.Panel"?
- How to not open the same Popup WPF MVVM?
- How to set data context of ViewModela View's xaml?
- Asynchronous MVVM commands
- Proper MVVM ViewModel and Model pattern
- Modeling an XML hierarchy for traversal with MVVM
- Ext JS 5 Data Binding Combobox
- Combobox and IDataErrorInfo
- Change default error message when enter non digit in a textbox requires integer
- MVVM: Updating ViewModel properties based on Model properties
Related Questions in PORTAUDIO
- How can I fit "ol.Map" to "Ext.panel.Panel"?
- How to not open the same Popup WPF MVVM?
- How to set data context of ViewModela View's xaml?
- Asynchronous MVVM commands
- Proper MVVM ViewModel and Model pattern
- Modeling an XML hierarchy for traversal with MVVM
- Ext JS 5 Data Binding Combobox
- Combobox and IDataErrorInfo
- Change default error message when enter non digit in a textbox requires integer
- MVVM: Updating ViewModel properties based on Model properties
Related Questions in PITCH-SHIFTING
- How can I fit "ol.Map" to "Ext.panel.Panel"?
- How to not open the same Popup WPF MVVM?
- How to set data context of ViewModela View's xaml?
- Asynchronous MVVM commands
- Proper MVVM ViewModel and Model pattern
- Modeling an XML hierarchy for traversal with MVVM
- Ext JS 5 Data Binding Combobox
- Combobox and IDataErrorInfo
- Change default error message when enter non digit in a textbox requires integer
- MVVM: Updating ViewModel properties based on Model properties
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)
Popular # Hahtags
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?
Resampling is not a capability of PortAudio. Like the native audio i/o APIs that PortAudio wraps, PA streams run at a constant sample rate. To change the pitch (playback rate) of a sample you need perform on the fly sample rate conversion. You can do this by interpolating the original signal using a phase index that increments at some non-unity rate.
Depending on your requirements you can investigate either resampling/interpolation or pitch-time modification.
Commonly used low to medium quality high performance polynomial interpolation algorithms for audio are linear interpolation and cubic hermite interpolation. Higher quality interpolation can be performed with some variant of windowed sinc interpolation. A library you could use for sinc interpolation is Secret Rabbit Code.
For pitch/time transformation (a.k.a. pitch-shifting or time stretching) you might consider using the DIRAC library, which has an open source version for mono signals. There are other commercial libraries available e.g. from z-plane research.