Audio Bit Depth Converter
Convert audio files between 16-bit, 24-bit, and 32-bit float resolution with optional Triangular Probability Density Function (TPDF) dithering to eliminate harsh truncation distortion.
Audio Bit Depth Converter — 16-bit, 24-bit & 32-bit PCM Requantizer with Dither: Free Audio Bit Depth Converter tool: convert audio bit depth between 16-bit, 24-bit, and 32-bit float PCM online with TPDF dithering to eliminate.
How to Convert Audio Bit Depth with Dithering
Upload High-Res Audio Track
Import your 24-bit or 32-bit float master studio recording or audio stems.
Select Target Word Depth
Choose 16-bit for CD burning and standard MP3 encoding, or 24-bit for audiophile distribution.
Enable TPDF Dither
Apply Triangular Probability Density Function dithering to transform harmonic truncation distortion into benign white noise.
Download Re-Quantized WAV
Export your finished audio file encoded precisely at your desired bit resolution.
The Mathematics of Bit Depth, Truncation Distortion, and TPDF Dither
In digital audio Pulse Code Modulation (PCM), bit depth governs the vertical resolution (amplitude precision) of every sample point. A 16-bit word allocates $2^{16} = 65,536$ discrete amplitude steps. A 24-bit word provides an astonishing $2^{24} = 16,777,216$ steps—256 times more granular resolution.
The Truncation Problem
When downsampling a 24-bit recording to 16-bit, the bottom 8 bits of every sample must be discarded. If you simply truncate (round off) these numbers, the rounding errors correlate directly with the input musical signal. During quiet acoustic fades, this correlation manifests as harsh, buzz-like harmonic quantization distortion.
How TPDF Dither Solves Distortion
Dither is an intentional, microscopically quiet randomized analog noise added to the signal immediately before quantization. By adding two independent uniformly distributed random numbers ($R_1, R_2 in [-0.5, 0.5] ext{LSB}$):
$$ ext{Dither}_{ ext{TPDF}} = R_1 + R_2$$
The resulting triangular probability density function completely de-correlates the quantization error from the audio signal. In exchange for an imperceptible increase in the noise floor at $-96 ext{ dBFS}$ (completely inaudible to human listeners), all harsh distortion is eliminated, allowing sounds quieter than the 16-bit noise floor to fade smoothly into silence.
Key Benefits of the Audio Bit Depth Converter
True TPDF Dithering
Applies industry-standard triangular noise to eliminate truncation artifacts and harmonic grain.
16-Bit & 24-Bit WAV Export
Download clean, production-ready PCM files formatted precisely for Red Book CD or studio mastering.
Vintage 8-Bit Chiptune Mode
Requantize audio to authentic 8-bit resolution to produce crunchy retro video game sound effects.
Quantization Grid Visualizer
Interactive canvas illustrates discrete step rounding and dither dispersion in real-time.
100% Client-Side Engine
Re-quantization mathematics execute entirely inside your device's memory with zero server uploads.
Lossless Dynamic Range
Calculates exact SNR and theoretical dynamic range for every standard bit resolution.