sonicTry a before-and-after example using our original six-second sample. No upload needed.
Generated locally with the same audio engine used for your files.
Tempo control changes how long the track takes to play while aiming to keep the original musical pitch. Sonic divides the recording into short overlapping pieces, aligns similar waveform sections and blends them into a shorter or longer result.
Tempo ranges from 50% to 200%. 100% leaves timing unchanged, 50% roughly doubles duration, and 200% roughly halves it. A 60-second track at 120% becomes about 50 seconds. This percentage is a speed multiplier, not a beats-per-minute detector.
Try 90% to practice a difficult passage or 110% to add energy. Start with small changes, then compare sustained notes, drum hits and vocal syllables against the original.
Time stretching can introduce flutter, repetition or softer transients, especially near 50% or 200%. Dense mixes and percussion are more demanding than simple tones. The algorithm aims to preserve pitch but cannot guarantee transparent results for every recording.
It changes speed by a percentage. If you know the source and target BPM, set percentage to target BPM divided by source BPM, multiplied by 100.
Upload your audio or try the sample, adjust the controls above, then click Apply effects. Select Original and Result to compare. Change the settings and apply again to revise. Every revision starts from the untouched original, and Download WAV saves the latest applied version. The player’s Volume control changes only listening volume.