Fixed the auido guide bugs

Philipp Hempelrequested to merge
b9-functional-error-in-the-audio-guide into dev
  • Playback speed can now be set to every value from 0.5 to 2.0
  • The loading circle is now a circle
  • the audio is loaded when you open the artwork so you can use the slider before you start the audio
Edited by Philipp Hempel

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