How it works
Apply a fixed gain, from silence to a fourfold volume increase.
100% preserves gain;0% produces silence. Samples beyond full scale are clipped and a warning is shown.
Select local files; nothing is uploaded. Preview the result before downloading.
Example
Gain(%)=50% : 0.5 → 0.25
Limits
PCM WAV input only:8/16/24/32-bit integer or32-bit float, mono/stereo,8000–96000Hz. Output:16-bit PCM WAV. MP3/M4A/OGG/FLAC are not supported in v1.
Memory is checked from duration, channels and sample rate before decoding. The working budget is64MiB mobile or128MiB desktop; source PCM≤32MiB, duration≤180s.