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Audio output design

Discussion in 'Electronic Design' started by chuck, Feb 28, 2007.

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  1. chuck

    chuck Guest

    Radio Shack used to sell something based on the ISD1520 chip. At one
    time, Digi-Key carried various models of this chip. Maybe that will help
    you get started.

  2. Guest


    I am trying to find the easiest way to design a circuit that would
    allow prerecoded sound (piano, flute, animal sound etc...) to play
    whenever a key is pressed. I want to actually recreate those cheap
    keyboard you can buy for kids but make it easy to change the sound

    I was wandering if there was any "off the shelf" IC chip that would
    allow this type of application. My goal would be to design a keyboard
    that would have about 12 notes.

    Thank you for you Help.

  3. Guest

    Radio Shack used to sell something based on the ISD1520 chip. At one

    I though about this avenue, but how can I record 12 to 20 sounds
    (different animal sounds or different piano tones) and use another
    chip that would allow me to look into a lookup table to get the sound
    I need when I touch the first key and another sound for the next key.

    Also I am looking to make a polyphonic instrument, so I want to play
    multiple sounds at the same time...

    Any suggestions?


  4. chuck

    chuck Guest

    I was under the impression that you could randomly access multiple
    stored sounds with the device, so if my memory is correct, that should
    not be a problem if you simply decode the keys to access particular
    stored sounds.

    The polyphonic part or your requirement does make it tough. I suppose
    you could use multiple chips, but that doesn't sound friendly. Surely
    you can do what you want with a computer. Any computer, but one with a
    soundcard makes life easy.

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