by Erf Studio
Bit Depth Calculator
Compare 16, 24 and 32-bit float audio, dynamic range and headroom, and work out uncompressed file size for any length.
Runs entirely in your browser. Nothing is uploaded.
How to use
- Set the sample rate, channel count and length of your recording.
- Compare 16, 24 and 32-bit float for dynamic range, amplitude steps and file size.
- Click a depth to read its practical use and headroom.
- Use the file-size figure to plan storage for a session or delivery.
Examples
- Record and mix in 24-bit for around 144 dB of range, so you can track conservatively and still keep noise inaudible.
- Deliver a finished master in 16-bit, its 96 dB range is ample for playback and keeps the file small.
- 32-bit float on a field recorder effectively cannot clip in the file, so you set the level in post instead of on set.
Frequently asked questions
What does bit depth actually change?
It sets how finely each sample is measured, which determines the dynamic range and the noise floor. More bits mean a lower noise floor and more room between the quietest and loudest sounds.
Why does 32-bit float not clip?
Floating point stores an enormous range, so even a signal that goes past zero on the meter is captured without distortion and can be brought back down later. The catch is double the size of 16-bit.
Should I deliver in 24-bit?
Record and mix in 24-bit, then dither down to 16-bit for delivery where required, such as CD. For high-res download or video, 24-bit delivery is fine.
