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  2. Audio time stretching and pitch scaling - Wikipedia

    en.wikipedia.org/wiki/Audio_time_stretching_and...

    The simplest way to change the duration or pitch of an audio recording is to change the playback speed. For a digital audio recording, this can be accomplished through sample rate conversion. When using this method, the frequencies in the recording are always scaled at the same ratio as the speed, transposing its perceived pitch up or down in ...

  3. Comparison of audio coding formats - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_audio_coding...

    196 kbit/s and up in lossy mode (for CD audio) 3523.8 ms Yes Yes Yes Yes: Up to 256 channels Windows Media Audio Standard: MDCT: 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz 8–768 kbit/s >100 ms Yes Yes Yes Unofficial, requires modification Windows Media Audio Pro: MDCT

  4. High-Efficiency Advanced Audio Coding - Wikipedia

    en.wikipedia.org/wiki/High-Efficiency_Advanced...

    High-Efficiency Advanced Audio Coding (HE-AAC) is an audio coding format for lossy data compression of digital audio defined as an MPEG-4 Audio profile in ISO/IEC 14496–3. It is an extension of Low Complexity AAC (AAC-LC) optimized for low- bitrate applications such as streaming audio .

  5. Data compression - Wikipedia

    en.wikipedia.org/wiki/Data_compression

    The acceptable trade-off between loss of audio quality and transmission or storage size depends upon the application. For example, one 640 MB compact disc (CD) holds approximately one hour of uncompressed high fidelity music, less than 2 hours of music compressed losslessly, or 7 hours of music compressed in the MP3 format at a medium bit rate ...

  6. Advanced Audio Coding - Wikipedia

    en.wikipedia.org/wiki/Advanced_Audio_Coding

    Advanced Audio Coding (AAC) is an audio coding standard for lossy digital audio compression.It was designed to be the successor of the MP3 format and generally achieves higher sound quality than MP3 at the same bit rate.

  7. List of numerical libraries - Wikipedia

    en.wikipedia.org/wiki/List_of_numerical_libraries

    Armadillo is a C++ linear algebra library (matrix and vector maths), aiming towards a good balance between speed and ease of use. [1] It employs template classes, and has optional links to BLAS and LAPACK. The syntax is similar to MATLAB. Blitz++ is a high-performance vector mathematics library written in C++.

  8. Audio file format - Wikipedia

    en.wikipedia.org/wiki/Audio_file_format

    Audio file icons of various formats. An audio file format is a file format for storing digital audio data on a computer system. The bit layout of the audio data (excluding metadata) is called the audio coding format and can be uncompressed, or compressed to reduce the file size, often using lossy compression.

  9. OpenAL - Wikipedia

    en.wikipedia.org/wiki/OpenAL

    OpenAL (Open Audio Library [3] [4]) is a cross-platform audio application programming interface (API). It is designed for efficient rendering of multichannel three-dimensional positional audio. It is designed for efficient rendering of multichannel three-dimensional positional audio.