Trim silence first, stretch only if needed
Most voiceovers are longer than they need to be because of the pauses between words and sentences. Audio2Time removes that dead air first, which usually recovers a few seconds with zero audible change. Only the leftover difference is handled by a pitch-preserving time-stretch (WSOLA), the same class of algorithm used in professional DAWs for speech. The result: a shorter clip that still sounds natural, at whatever exact length you set.
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Frequently asked questions
How do I shorten a voiceover without changing the pitch?
Use time-stretching, not playback speed-up. Audio2Time trims silences, then applies a pitch-preserving tempo change for the rest — the pitch never moves.
Why does speeding it up sound like a chipmunk?
Because plain speed-up raises pitch with tempo. A time-stretch changes only tempo, avoiding it.
How much can I shorten it before it sounds bad?
Silence removal is inaudible; tempo up to ~+20% is subtle. Above +20% is flagged, above ×2 refused.
Related: fit a voiceover to exactly 30 seconds · fit narration to a video length