Sample Rate Converter - Resample Audio Online

No. Resampling is done by FFmpeg compiled to WebAssembly in your browser tab. The audio is read, converted and saved on your device, and no copy is sent to a server.

Use 44.1 kHz for music that will go to streaming services, CDs and most music releases. Use 48 kHz for anything that goes into video, broadcast or film, since that is the standard clock in those workflows. If a video editor shows a project at 48 kHz and your music is 44.1 kHz, converting the music avoids sync drift or an extra resample on export.

No. A 44.1 kHz recording has no content above about 22 kHz, and raising it to 96 kHz gives the same information at a higher rate with empty space above. It only helps when a destination requires that rate, such as a project template or a piece of hardware.

For voice. 16 kHz is a common requirement for speech recognition and transcription tools, and 8 kHz is the standard for telephone audio. Lower rates also shrink uncompressed WAV files in proportion, so a 22.05 kHz file is half the size of a 44.1 kHz one. For music, avoid going below 44.1 kHz because it removes the highs.

That follows what the formats support in practice. MP3 encoders handle rates up to 48 kHz. AAC in an M4A container handles up to 96 kHz. Above those limits only WAV is offered, and WAV can hold every rate on the list.

Bit depth sets the dynamic range of the file. 16-bit is the standard for finished music and is plenty for listening. 24-bit gives more headroom and a lower noise floor, which matters when you keep editing or mixing afterwards. Converting from a 16-bit source to 24-bit does not add detail, only room for further processing.

No. Sample rate conversion keeps the duration and pitch identical. It changes how many samples per second represent the same sound. If the track becomes faster or slower in your editor, the file was likely imported at the wrong rate rather than resampled.