AudioProcessor

Basic program to change the pitch of a WAV audio file as required by the user.

Library

• Simple Direct Media Layer (SDL)
  • Inbuilt wav functions used to load audio data and devices.

Audio Data Manipulation

Done by void ChangePitch(void *userdata, Uint8 *stream, Uint32 length)

• User defined function used to manipulate the pitch of the audio and write to output stream of the audio device.
• userdata cast into user defined structure AudioData which allows storage of required data such as position of current sample, desired pitch and total length of the audio.
• volume assumed to be 100, but can be taken as user input also by adding a volume member to AudioData.
• pitch is changed in the for loop and data from audio sample is copied to the output stream.

Usage

Build the cpp file and run it using the command nameofexe [absolute filepath of wav file] [factor to increase pitch]

Dependencies

SDL2.dll is required to run the program