Display Subtitles over MP3
Suggestion:
There are cases when I am only able to obtain the audio of a video file (e.g. by playing it on YouTube and recording via Audacity).
Subtitle composer can play MP3 and show the WAV form, but it would not show them in the video window if there is no video data. Would that be possible? Even if it means, of course, having yellow subtitles on a black screen. But for QA checking it would be more intuitive than following the grey line in the editing area.