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Signal Manipulation With Wave Files

Signal Manipulation With Wave Files. Brett Gottschalk Andrew Williams. Project Goals. Manipulate multiple wave files into a mix Utilize Matlab and Cool Edit 96 to mix and alter sounds Compare the Matlab procedure with the Cool Edit procedure. Description.

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Signal Manipulation With Wave Files

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  1. Signal Manipulation With Wave Files Brett Gottschalk Andrew Williams

  2. Project Goals • Manipulate multiple wave files into a mix • Utilize Matlab and Cool Edit 96 to mix and alter sounds • Compare the Matlab procedure with the Cool Edit procedure

  3. Description • By manipulating the sound files as vectors, various special effects are simulated and mixed into the final sound file. • The sound files used were from the Playstation game “CastleVania: Symphony of the Night” by Konami See the Project Report and Proposal FOR MORE INFO...

  4. Sound Sources • “Moonlight Nocturne” - Intermission music track • Various voices from Alucard, Maria, Dracula, Sword Familiar, Demon Familiar, and the Konami Sound Test

  5. Standard Techniques Used • Reverse Playback • Halve and Double Vector • Overlap • Add Echo • Volume Variation

  6. New Techniques Used • Fade in and Fade out • Comparison to commercial sound editor Cool Edit 96

  7. Sounds Techniques Applied To • Reverse Playback: Konami Sound Test • Half and Double: Dracula’s death, Sword Familiar • Overlap: All. A voiceover of the samples was done • Echo: Demon Familiar • Volume Variation: Demon Familiar • Fade in and Fade out: Moonlight Nocturne

  8. Procedures • Split base sound file of “Moonlight Nocturne” into 7 files to allow Matlab to read them properly. • Wrote a separate function for each operation, applying them separately. FOR MORE INFO... See the M-Files in report

  9. Result • The sound files sounded roughly the same, though slight skips are noticeable in the Matlab-altered version from the file split and recombination. • The Cool Edit Manipulations were performed much faster, but it was more difficult to specify the exact requirements needed.

  10. Summary Slide • Matlab is well-suited for manipulating vectors, but the size of the vectors required for high-quality sounds gives a large performance hit, resulting in unsatisfactory speed in performing the manipulations.

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