Hear the difference
Try 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.
Loudness, explained.
Loudness changes the level of the exported recording, unlike the player volume control which only affects your listening. Sonic applies a fixed gain to the samples and uses a soft limiter on boosted peaks to reduce hard clipping.
Every parameter, explained
Gain
-24 dB to 24 dB · Default 6 dBGain ranges from −24 to +24 dB. Zero leaves the level unchanged. +6 dB approximately doubles sample amplitude before limiting; −6 dB roughly halves it. Perceived loudness does not increase in a fixed proportion because it also depends on the material and playback setup.
A good place to start
Try +3 to +6 dB for a quiet recording, or −6 dB to leave more headroom. Compare quiet and loud passages rather than judging from one moment.
What to listen for
Large boosts bring up background noise as well as useful sound. The soft limiter can flatten peaks and add saturation when driven strongly. This is a gain control, not LUFS normalization or a compressor with adjustable attack and release.
Why is this different from the volume slider?
The player volume slider changes playback only. This effect changes the downloaded WAV itself.
Make a version you want to keep
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.