Audacity is a free and open-source audio editor. It is great for simple audio edits and applying effects.
Flashback Voice Effect
Audacity can be used to create the flashback voice effect from the original Amnesia game. This effect can be achieved with the following steps:
- Effect > Reverse (This reverses the audio back in time).
- Use a reverb effect of your choice. Make sure to not make it too strong, as it might overwhelm the actual speech.
- Effect > Reverse.
- Effect > GVerb:
- Roomsize: 10
- Reverb time: 0.75
- Damping: 0
- Input bandwidth: 1
- Dry signal level: 0
- Early reflection level: -15
- Tail level: -17.5
Convert to OGG format
OGG format is the recommended format for audio files for HPL, and Audacity comes with support for exporting in OGG.
If you need to convert an MP3 (or any other audio), simply import (or open) an audio file into Audacity, then click on File > Export and choose OGG Vorbis for the file type.