Slowing Audio to 0.8× Stretches an 8-Second Clip to 10 Seconds

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A common mistake when changing audio speed is assuming a 0.8× setting shortens or lengthens the clip by the same percentage. Duration scales inversely with the speed multiplier, so an eight-second track slowed to 0.8× lasts 10 seconds, a 25% increase. The Creatune team tested this on November 4, 2026, using a synthetic WAV tone and a public speed changer. Their measurements covered exported file duration and format metadata, not listening quality or pitch preservation. The article gives the formula for percentage change and shows how to request a specific multiplier to hit a target length. It also recommends measuring the exported file rather than relying on the interface's displayed total.

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