How to write C++ audio processing applications?

Question

I'm an Electronics and Telecommunications student, next to my graduation. I'm gonna work on a project that involves my knowledge about DSP, music and audio in general. I allready know all the basic mathematic instruments and all the stuff I need to manage it, such as FFT, circular convolution ecc ecc.

I want to learn C++ programming basically for one reason: it's very important in the professional world!!! And I think it's one of the most used to write applications working with audio, especially when it's about real time processing.

Ok, after this small introduction I would like to know first, which are the most used libraries to work with audio processing in c++?? I was longer looking on the web but i couldn't find a lo of working stuff. (I work under linux with eclipse CDT enviroment).

Then I would like to know if there are good sources to learn how to write some working code, such as for example how to write a simple low pass filter. Basically now i will not write real time applications, I would like to start from the processing of a WAV file, or even better an MP3 file, so basically on vectors of samples.

Let's say that basically for now I would like to extract the waveform from an audio file, and save it to a thumbnail or to a PNG image.

Ok, for now I think it's all I would need.

Any ideas, advices, libraries, books, interesting sources about that?

Thanks a lot in advance for any kind of answer.

Giovanni.

Answer 1

Checkout this link which will give you some information on the available (commercial and open source) audio editing softwares.

Some interesting open source audio editing tools which are written in c++,

1. Audacity
2. LMMS
3. Qtractor
4. Ardour
5. Rosegarden

C++ library for audio processing.

1. SndObj
2. The Synthesis ToolKit in C++

C++ Code and links related Filters and audio processing..

C++ code for Filter,Audio Processing

Code Guru,Low pass filter