On SuperCool, you don't need to hunt through stock libraries or worry about complex audio syncing. You can generate original, royalty-free music and layer it perfectly under your footage in one seamless workflow.
Here is how to do it.
1. Define the Mood and Energy Level
Before adding music, identify the 'vibe' of your video. Music should support the visual, not compete with it. If your video is a fast-paced tutorial, you need high-bpm energy. If it’s a cinematic brand story, you need atmospheric depth.
Prompt Example: The Cinematic Background
"Add a cinematic, ambient lo-fi track to this video. It should be mellow, featuring a soft piano melody and a light hip-hop beat. Keep the volume at 20% so it stays behind the voiceover. Fade in over the first 3 seconds."
2. Match the Audio to the Video Length
One of the biggest mistakes in video editing is music that cuts off abruptly or loops awkwardly. When prompting SuperCool, specify that the music should match your video's duration or transition at specific timestamps.
Prompt Example: The Perfect Loop
"Generate an upbeat corporate tech track that is exactly 60 seconds long to match this video. Ensure the track has a definitive 'sting' or ending note at the 59-second mark to coincide with the logo reveal."
3. Balance the Audio Levels (Ducking)
If your video has a voiceover, the music must 'duck' (lower in volume) whenever someone is speaking. You can instruct SuperCool to handle these levels automatically so the music doesn't drown out the information.
Prompt Example: Voiceover Balance
"Layer an inspiring acoustic guitar track under this video. Set the music volume to 10% whenever the voiceover is active, and increase it to 40% during the visual transitions where there is no speaking."
4. Use Sound Effects for Emphasis
Background music provides the foundation, but sound effects (SFX) provide the impact. Use them to highlight text overlays, scene transitions, or key actions.
Prompt Example: Strategic SFX
"Add a subtle 'whoosh' sound effect every time a new text heading appears on screen. Sync a light 'pop' sound to the button click at 0:15. Keep these effects crisp and slightly louder than the background music."
5. Refine and Iterate
If the first track isn't hitting the right note, use specific descriptive feedback to pivot the style without starting over.
Instead of: "Change the music." Try: "Keep the rhythm but swap the synthesizer for a clean electric guitar. Make the overall tone feel more 'summery' and bright."
Instead of: "It's too loud." Try: "Reduce the music volume by 50% across the entire clip. It's currently competing with the speaker's voice."
Instead of: "Make it faster." Try: "Increase the tempo of the background track to 128 BPM to match the fast cuts in the editing."
Always listen to your final export on both headphones and phone speakers. Music that sounds perfect on high-end headphones can sometimes overwhelm a voiceover on a mobile device. If in doubt, drop the music volume by another 5%—subtle background audio is always better than distracting audio!