Ringtone clip window suggester

This calculator turns a song duration and an estimated chorus start into a practical clip window. It targets a 25-second selection, places five seconds of lead-in before the chorus when space permits, and shifts the window safely at either edge of the song. The result includes seconds, readable timestamps, the chorus offset, and a placement label for quick editing.

Start with two reliable timing measurements

Enter the full song duration and your best estimate of where the chorus begins, both in seconds. A media player or audio editor can usually show these values precisely enough; decimal seconds are accepted, so you do not need to round a marker such as 1:03.800 to a whole second. The song must be at least 20 seconds long because the result promises a ringtone-sized window between 20 and 30 seconds. The chorus estimate may be at the beginning or at the exact end, but it cannot be negative or extend beyond the song. If you are choosing between two possible chorus markers, prefer the moment the musical transition lands rather than the first lyric syllable. That gives the suggested five-second lead-in room to include a pickup, drum fill, or harmonic change. The calculator does not inspect or upload audio, so its quality depends on the timing estimate you provide. It performs only deterministic timeline arithmetic and returns the same result for the same two values every time.

Understand how the clip is positioned

For songs lasting at least 25 seconds, the calculator proposes a 25-second clip. Its preferred start is five seconds before the estimated chorus, leaving 20 seconds after that marker for the opening hook and its continuation. In a typical chorus, this places the most recognizable early phrase near the useful center of the ringtone while preserving a short musical approach. If that preferred window would begin before the track, the entire selection shifts forward to zero. If it would run beyond the track, the selection shifts backward so its end matches the song duration. Songs from 20 up to 25 seconds use their complete duration, which keeps the result inside the promised range without inventing unavailable audio. The `chorus_offset_seconds` value tells you exactly where the estimated chorus lands inside the returned selection. The `placement` value explains whether the ideal arrangement was retained or moved against the beginning or ending boundary, making edge cases visible instead of silently hiding the adjustment.

Use the result in an editor or automated workflow

Copy `start_seconds` and `end_seconds` into an editor that accepts numeric positions, or use the formatted timestamps when working by eye. Listen through the cut before exporting it. A mathematically valid window can still begin on a vocal breath, split a pickup note, or end just before a cadence because the calculator knows the estimated chorus position but does not analyze beats, lyrics, loudness, or musical structure. Small manual moves are reasonable after auditioning, especially when a phone fades audio in or stops ringing early. For repeatable catalog work, store the original duration and chorus estimate with the returned window so another editor can reproduce the decision. API requests cost $0.002 per item, while the browser version uses the same deterministic calculation. An estimate beyond the song duration is rejected rather than clamped, because silently accepting an impossible marker could produce a plausible-looking window attached to the wrong recording, edit, or metadata row.