Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 4 years ago.
Improve this question
Does anyone know a good open-source library with detection of harmonic pitch class intensities (chroma) of audio signal? That is, for a given piece of audio, intensity of each of 12 musical pitches.
http://en.wikipedia.org/wiki/Harmonic_pitch_class_profiles
It can be in c, c++, or java as long as the speed (complexity) is good. I don't need it for real-time use, but would use it on hours of material, so speed is a bit more important than quality.
Have a look at the Chromagram plugin in the QM Vamp Plugin library. To make sure it's exactly what you want, you can download a binary and test it in Sonic Visualizer before compiling it yourself.
Take a look a this webpage. The Website of Dan Ellis has tons of sound-related MATLAB examples
http://www.ee.columbia.edu/~dpwe/resources/matlab/chroma-ansyn/
Related
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 5 years ago.
Improve this question
a few weeks ago I saw a website with a powerful generator to create beautiful pictures of own source code files. The generator created images with variable effects like perspective transformations and depth of field, etc.
Typically I don't ask such questions in here but I googled more than 2hrs and I cannot find this generator anymore. I'm really going crazy - I know this site exists ...
Here's a sample picture of code made with this generator:
Thank you very much!
Waescher
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 5 months ago.
Improve this question
I'm a novice in the field of ellipse detection/extraction. But I know this topic has a long history. Although there are tons of papers addressing ellipse detection, I can hardly find any C++ implementations of these advanced algorithms such as Straight Line HT (SLHT), Fast Ellipse Hough Transform (FEHT), and Randomized HT (RHT). I'm curious Why the researchers don't put their code online such that more people can benefit from them? Can anyone kindly tell me where I can find any of the C++ implementations? Thanks.
(PS: I'm familiar with OpenCV. I know OpenCV has few implementations such as fitEllipse and HoughCircle.)
A lot of image processing research is done in Matlab, there are generally implementations available in that language. The reason you don't see any C++ implementations is because they would be much more about the details of implementation (memory management, performance, etc) rather than the actual algorithm; Matlab is much more succinct about this.
If you really want to get to learn about image processing algorithms, you'll probably want to learn to read Matlab code.
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 4 years ago.
Improve this question
A human sings a musical tone and wants to convert into a musical instrument playing the same. On processing the .wav file of the recorded human voice using aubio.org, I am able to get the pitch/frequency at different time intervals. But how to get the notes of musical instruments to be played from this data or Is there some tuner that can help me do this ?
For pitch, use the formula that MIDI 69 = 440hz, so (python/pseudo code)
midiNote = round(12 * (log(freq/440.0), 2))) + 69
But you'll find that things can actually be more complex than this for rhythm because. I'd use an already made rhythmic "quantization" package (that's the Google search term you'll want) because determining both the tempo and whether something that is 1.125 beats long should be transcribed as a quarter note or a quarter note tied to a 32nd note will depend a lot on context and it's a big programming job. There are several preexisting toolkits that will do it for you. My own python framework music21 has an audioSearch module that should do the trick for simple pieces -- at least you could take the code there and put it into your own package, since it's pretty standard FFT sample conversion techniques.
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 4 years ago.
Improve this question
Can anyone recommend any software/books required to learn and build fractal patterns? I want to also be able to animate the fractal patterns too. Like something off of winamp.
For book on animated fractal Fractals: An Animated Discussion with Edward Lorenz and Benoît Mandelbrot could be what you want.
You might like: The Computational Beauty of Nature
http://mitpress.mit.edu/books/flaoh/cbnhtml/
I am working on a project in java for creating fractals (flame fractals).
The user provides a script file in javascript, that takes care of the interpolation between fractals. Also, as input, one can provide a file that affects an animation in some way,
so this is the way to make an animation change to some music,
see for example
http://www.youtube.com/watch?v=imDPqR9cDL8
I can send you the source code if you provide me with an address.
There's lots of fractal programs out there.
I know that Ultrafractal is pretty popular, but not free.
As far as free ones go, there are programs such a ChaosPro and others. A quick google search will find them for you.
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 4 years ago.
Improve this question
Are there any frameworks or open-source code that would simplify the process of implementing a real-time oscilloscope (time-domain audio visualisation) in OSX?
Ideally, I want to display a simple animated view representing the audio signal being input by the microphone input.
The easiest way to do this is to use a QCView. It's pretty easy to find QC compositions that display a bar graph display of the audio output.
Look at a language called Pd (Pure Data). It's the free version of Max/MSP. It's the easiest way to do anything with audio. One of the classes is in fact an oscilloscope. Simply draw a line from the output of your sound source (it can be your mic, a sound file, or a live oscillator) to the oscilloscope and bathe in the visual output glory!
http://puredata.info/
the SurfaceVertexProgram example is a nice demonstration of how to do an oscilloscope using OpenGL. the example is a bit out-dated (you have to build up a new xcode project), but functions and demonstrates very useful techniques.