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Thread: Advice? Teensy 3.6, build an audio recording device that also does pitch shifiting

  1. #1
    Junior Member
    Join Date
    Feb 2018
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    9

    Advice? Teensy 3.6, build an audio recording device that also does pitch shifiting

    Hi, I am currently designing this project for a project class.

    I am trying to build an audio recording device with Teensy 3.6 and Teensy Audio board. A copper coil keyboard will also be integrated into the device. After the I2S microphone breakout samples the audio input, I want to use the audio board to implement pitch shifting on the original audio input so that I could hear it when I play with the keyboard.

    I've been looking around and I have successfully found some threads that document recording with teensy but not pitch shifting. Is there any way to go about this? Is this project feasible?

    Any help is appreciated!! Thank you!!

  2. #2
    Senior Member+ Theremingenieur's Avatar
    Join Date
    Feb 2014
    Location
    Colmar, France
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    2,587
    Pitch shifting involves
    - either interpolating and resampling
    - or fixed or variable carrier modulation and filtering (similar to an analog ring modulator)

    Both can most probably done with the Teensy, but as far as I know, nobody has actually shared specific code. It's your turn to contribute a new object to the audio library!

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