How long should an intro prompt actually be?
Most podcast intros run 5 to 15 seconds and most YouTube channel stings run 3 to 8 seconds. Put the number of seconds directly in the prompt, because Suno tends to write full song structures by default and a length hint pushes it toward something short.
If the model still returns a longer track, treat the first 10 to 15 seconds as your usable clip and trim it in an editor rather than asking for a shorter regeneration each time, since Suno does not guarantee an exact duration.
Why do intros need a specific ending word?
Say "clean ending", "ends on a hit" or "stops cold" instead of leaving the ending unspecified. Without this, intros often fade out gradually, which sounds unfinished when it is cut straight into speech or a title card.
A defined ending also gives you a clear edit point: you can cut the audio exactly where the last hit lands instead of guessing where a fade becomes silent.
Should an intro use a lo-fi style?
Lo-fi works well for chatty, relaxed podcasts because its tempo range (60 to 90 BPM, most often 70 to 85 BPM) and dusty, mellow texture sit under an intro voiceover without competing with it. Keys are often minor with seventh and ninth chords, commonly D minor, which gives a mellow rather than dramatic feel.
For higher-energy shows, gaming streams or business content, a brighter electronic or cinematic sting at 100 to 128 BPM reads as more alert and works better for a fast cut into a logo or title.
Instrumental or with a short vocal stamp?
- Instrumental sting: say "Instrumental" explicitly, since Suno's style box does not always assume no vocals for a short prompt.
- Spoken or sung logo tag: put the words (for example "you're listening to [show name]") in the lyrics box, keep it to one short line, and describe the voice in the style box, such as "warm female voice, close mic, confident tone".
- Section tags: square-bracket tags such as [Intro] and [Outro] are a common convention Suno often follows, but for something this short they usually are not needed.
What if Suno keeps writing a full song instead of a sting?
This happens most often when the prompt only names a genre without a length or an ending instruction. Add the seconds, the ending word and drop any mention of verses or choruses, since those words push the model toward a full song structure even when the length is stated.
Common mistakes
- Leaving out a length in seconds, which lets the model default to a full song structure: state "8 seconds" or similar directly in the prompt.
- Not specifying an ending, which produces a slow fade that sounds unfinished when cut: add "clean ending" or "ends on a hit".
- Naming an artist or show for the sound you want: describe the traits instead, such as "punchy kick, bright pad, confident mood".
- Asking for vocals with full lyrics for a 5-second sting: keep sung or spoken lines to one short phrase, or mark it Instrumental.
- Piling on contradictory moods like calm and aggressive in the same prompt: pick one mood and let the tempo and instruments carry the energy.