Conversion of digital music to sheet music
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Conversion of Digital Music to Sheet Music. Hugh Smith. WAVE File Basics. RIFF FMT Data. https://www.seas.upenn.edu/~cis520/project/sound_wave.png. RIFF Descriptor Chunk. FMT Format Chunk. *If the file is compressed, more bytes may come after the end of the fmt chunk.

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Conversion of Digital Music to Sheet Music

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Conversion of Digital Music to Sheet Music

Hugh Smith


WAVE File Basics

  • RIFF

  • FMT

  • Data

https://www.seas.upenn.edu/~cis520/project/sound_wave.png


RIFF Descriptor Chunk


FMT Format Chunk

*If the file is compressed, more bytes may come after the end of the fmt chunk.


WAVE File Characteristics

  • Number of Channels = 1 for mono, 2 for stereo

  • Compression code: indicates type of compression used on the file

    • Can be many types:

      • Uncompressed

      • MPEG

      • GSM

      • Microsoft ADPCM

      • Etc.


WAVE File Characteristics, cont’d

  • Sampling rate

  • Block Align

    • SigBitsPerSample / NumChannels

  • Significant Bits per Sample

    • 8, 16, 24, 32


Data Chunk

* = The actual data of the file.


ABC Notation


Sound Waves

  • Amplitude

  • Phase

  • Frequency


Fourier Transform

  • Time domain  Frequency domain


Time Issues

  • Number of samples

  • Fourier transform


Bibliography

  • http://www.sonicspot.com/guide/wavefiles.html

  • https://ccrma.stanford.edu/courses/422/projects/WaveFormat/

  • http://thesession.org

  • F. Richard Moore, Elements of Computer Music

  • http://www.phy.mtu.edu/~suits/notefreqs.html

  • http://www.dspdimension.com/admin/dft-a-pied/


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