I fixed the missing cutscene audio issue following this user's guide and script to fix a different game: https://www.protondb.com/app/658260#wLSKQR4IhP

The solution is to change the audio codec to PCM audio (with for example ffmpeg).

Open up the install directory for AYESHA (in Steam, right-click on the game -> Manage -> Browse local files), go inside the directories Res/x64/movie/

Create an empty file in there named "fix_videos.sh" (without the quotes), open it, and copy and paste the following into the file:

#!/usr/bin/env bash

for wmv_file in *.wmv
do
new_filename="$wmv_file".ORIGINAL
echo "Renaming $wmv_file to $new_filename"
mv "$wmv_file" "$new_filename"

ffmpeg -i "$new_filename" -acodec pcm_s16le -vcodec copy "$wmv_file"
done

Open up a terminal in the /movie directory and run the following:

chmod +x fix_videos.sh
./fix_video

The script will backup the original files.

All credit belongs to the user linked above. I tried all different suggestions to get the cutscene audio working and this is the only fix that worked for me. You must run the game using a proton-GE custom compatibilty tool (I used GE-Proton9-11) for this fix to work.

Fix will need to repeated and applied to all files containing wmv video files. For example, these are the other directories I applied the fix to

• Res/x64 /movie_EN
• Res/x64 /movie_EN/Jpn
• Res/x64 /movie_EN/Eng

After the fix, the game appears to run perfectly