December 17th, 2015

Transformation and editing of the following original sounds:
speech-female.wav (xserra)
AMB - cowbells.wav (vinjatovix)
Cow moos (josephsardin)
Cowbell.wav (Neotone)
Transformations performed exclusively with the HPS transformation tool included in the SMS-tools provided in the ASPMA course (Coursersa) and a modified by me version of the frequency scaling tool to "tune" the fundamental of an harmonic modelled sound to a predefined value.
Sound clipping, multitracking and time alignment done in Audacity.


  • avatar
    Pufermufin 1 year, 6 months ago

    this sounds like a great intro to some major scale edm

  • avatar
    josemdavid 2 years, 4 months ago

    Hi there sleezstack, thanks for your comment. The basic effect is a pitch changing process, kind of a primitive "hand made" autotune. SMS-tools provide several algorithms bases on HPS (Harmonic Product Spectrum), among them a frequency scaler algorihtm, which I used to create different sound clips with the different syllables at the piches I needed.

    Frequency scaling compensation (not just pitch shifting) was applied, in order to preserve (as much as possible) the natural human voice timber.
    I then concatenated the different clips in an audio tool, piece by piece (hence the "handmade" part).

    Perhaps the more striking effect is because it is harmonized, i.e. each syllable is a combination of different notes in a simple 3 part harmony.

    In the final repetition an additional layer is added with the sounds treated pretty much the same way except that a simple frequency transposition (without proper scaling) was done. This produced the characteristic "Alvin and the Chipmunks" or "cartoon voice" effect.

  • avatar
    sleezstack 2 years, 4 months ago

    Wow love the quality of the vocals! What process is that specifically that gives it that awesome layered and digital sound?

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    unhacker 3 years, 2 months ago

    So cool!

  • avatar
    basstk 3 years, 8 months ago

    'La vaca cega' deserve this composition, emblematic for the course, congratulations!

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