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Eltro information rate changer

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The Eltro Information Rate Changer is an analog recording tool used to modulate pitch without affecting tempo. It is best known as the effect used in 2001: A Space Odyssey for the Hal 9000 computer.[1][2] Patents for the device date back to the 1920s.[1]

See also

References

  1. ^ a b Langford, Simon (2013). Digital Audio Editing: Correcting and Enhancing Audio in Pro Tools, Logic Pro, Cubase, and Studio One. CRC Press. p. 239. ISBN 978-1-134-11130-5.
  2. ^ Krapp, Peter (2011). Noise Channels: Glitch and Error in Digital Culture. University of Minnesota Press. p. 65. ISBN 978-0-8166-7624-8.
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