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[Bug 1909938] Re: Distorsion when moving rate slider + Rubberband

To: ubuntustudio-bugs@xxxxxxxxxxxxxxxxxxx
From: Daniel Schürmann <1909938@xxxxxxxxxxxxxxxxxx>
Date: Sun, 03 Jan 2021 22:19:47 -0000
Reply-to: Bug 1909938 <1909938@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

https://todo.sr.ht/~breakfastquay/rubberband/6

** Also affects: rubberband (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1909938

Title:
  Distorsion when moving rate slider + Rubberband

Status in Mixxx:
  New
Status in rubberband package in Ubuntu:
  New

Bug description:
  Rubberband seems to reset it's internal filter when changing the rate.
  This leads to a hear-able distortion.

  You can hear it best using a 440 Hz Test file.

  The alternative would be to use a second Rubberband and crossfade to
  the new one whenever the rate changes. Unfortunately we cannot effort
  the extra CPU for this. The solution must be implemented  CPU friendly
  inside Rubberband

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