Problem
When zooming in on the timeline too far the audio waveform may show up blank.
Solution
- Exit Camtasia and the Camtasia Recorder. Confirm that they are not running in Task Manager.
- Press Windows+R on your keyboard to open the Run window.
- Type the following and click OK: regedit
- Browse to:
- Camtasia 2021: HKEY_CURRENT_USER\SOFTWARE\TechSmith\Camtasia Studio\21.0\Camtasia Studio\21.0
- Camtasia 2020: HKEY_CURRENT_USER\SOFTWARE\TechSmith\Camtasia Studio\20.0\Camtasia Studio\20.0
- Camtasia 2019: HKEY_CURRENT_USER\SOFTWARE\TechSmith\Camtasia Studio\19.0\Camtasia Studio\19.0
- Camtasia 2018: HKEY_CURRENT_USER\SOFTWARE\TechSmith\Camtasia Studio\18.0\Camtasia Studio\18.0
- Camtasia 9: HKEY_CURRENT_USER\SOFTWARE\TechSmith\Camtasia Studio\9.0\Camtasia Studio\9.0
- Click the 21.0, 20.0, 19.0, 18.0, or 9.0 folder (depending on the version being used).
- Double-click the following value and change it from 1 to 0:
- Camtasia 9 - 2018.0.3: UseHardwareRenderingForWPF
- Camtasia 2018.0.4 and later: WPFUseHardwareForRendering
- Close the Registry Editor, and open Camtasia.