24-bit vs 16-bit for Mastering

Updated July 2026 · by Loopin

For mastering, always work and process in 24-bit — it gives you more headroom and lower quantization noise than 16-bit. For delivery, send streaming distributors a 24-bit WAV and let them convert, or for CD deliver 16-bit / 44.1 kHz with dither. The one rule that never changes: don’t master in 16-bit. You can master in 24-bit, free, in Loopin’s browser mastering.

The short answer

Bit depth splits into two decisions: what you process in, and what you deliver in. They have different answers, and mixing them up is where most confusion comes from.

Process in 24-bit, every time. Then choose your delivery format based on where the track is going — streaming distributors want a high-resolution file, while a physical CD needs the 16-bit standard. Get those two decisions right and bit depth stops being a worry.

Process in: 24-bit — always
Deliver to streaming: 24-bit WAV (they convert)
Deliver to CD: 16-bit / 44.1 kHz with dither
Never: master in 16-bit

Why work in 24-bit

24-bit gives you two concrete advantages while you’re processing. First, more headroom — more room for level to move around inside the file before you run into the limits of the format. Second, lower quantization noise, the tiny noise floor that comes from representing audio in discrete steps. More bits means finer steps and a lower noise floor.

Every gain change, EQ move and compression stage in a master involves recalculating sample values. Doing that math in 24-bit keeps the results cleaner and preserves detail that 16-bit would start to erode. There’s no downside to the extra resolution while you work — the file is a little larger, and that’s the whole cost.

Think of the extra bits as working room. You want the widest possible margin between your signal and the noise floor while the master is still taking shape, because each processing stage nibbles at that margin. Starting in 16-bit hands you less room before you’ve even begun.

More headroom for level to move during processing
Lower quantization noise — a lower noise floor
Cleaner results through EQ, compression and gain stages
No practical downside to processing at 24-bit

Delivering to streaming distributors

For streaming, send a 24-bit WAV and let the distributor handle the conversion to their delivery formats. You keep the highest-quality source in the chain for as long as possible, and their systems do the down-conversion and encoding that the platforms require.

The key idea is not to throw away resolution before you have to. Handing off a 24-bit file means the platform’s own tools make the final format decisions from the best possible source, rather than from a file you’ve already reduced.

Send a 24-bit WAV to the distributor
Let them handle the conversion to delivery formats
Keeps the highest-quality source in the chain
Don’t down-convert before you have to

Delivering for CD: 16-bit with dither

A physical CD is a 16-bit / 44.1 kHz format, so this is the one case where you deliver 16-bit. But you don’t just truncate from 24-bit to 16-bit — you apply dither when reducing bit depth. Dither is a tiny amount of noise added during the reduction that prevents quantization distortion, trading an audible artifact for an inaudible noise floor.

The order matters: do all your processing at 24-bit, and only reduce to 16-bit with dither as the very last step, when you’re creating the CD deliverable. Dither once, at the end — never repeatedly through the chain.

CD is a 16-bit / 44.1 kHz format
Apply dither when reducing to 16-bit
Dither prevents quantization distortion from the reduction
Reduce to 16-bit only as the final step

Master at the right bit depth step by step

Here’s the reliable path from mix to a correctly-delivered master:

Bounce your mix to a 24-bit WAV with headroom — peaks near −6 dB.
Open Loopin’s free mastering tool and drop the 24-bit file in.
Let the chain process and drive loudness toward about −14 LUFS at a −1 dBTP ceiling.
For streaming, keep the high-resolution source and send that to your distributor.
For CD, reduce to 16-bit / 44.1 kHz with dither as the final step.
A/B the master against your original, then export your delivery file.

Common mistakes

Mastering in 16-bit — you lose headroom and raise quantization noise while you still have processing to do.
Truncating to 16-bit without dither — that bakes in quantization distortion instead of an inaudible noise floor.
Dithering more than once — apply dither only at the final reduction, never repeatedly through the chain.
Down-converting before delivery — send streaming distributors the 24-bit file and let them convert.
Confusing bit depth with loudness — bit depth is resolution; loudness is still about −14 LUFS at −1 dBTP.

Bit depth vs sample rate vs loudness

It’s easy to tangle these three together, but they’re separate. Bit depth is the resolution of each sample — 24-bit to process, 16-bit or 24-bit to deliver. Sample rate is how many samples per second (44.1 kHz for CD). Loudness is how loud the finished master is, and that’s a completely different target.

Getting bit depth right doesn’t change your loudness job at all. You still drive the master toward about −14 LUFS with a −1 dBTP true-peak ceiling — the bit depth just decides how cleanly that level is represented. Loopin’s mastering tool processes cleanly and exports a 16-bit WAV for you.

Master it free

Loopin’s online mastering processes your 24-bit mix and drives it toward about −14 LUFS at a −1 dBTP ceiling, all in your browser — free, no signup, nothing uploaded, no watermark. Drop in a 24-bit WAV, A/B against the original, and export a 16-bit WAV in a couple of minutes.

Frequently asked questions

Should I master in 24-bit or 16-bit?

Work and process in 24-bit — it gives you more headroom and lower quantization noise. Never master in 16-bit. Reduce to 16-bit only at delivery, and only for formats that require it, like CD, with dither applied.

What bit depth do I deliver to streaming?

Send streaming distributors a 24-bit WAV and let them handle the conversion to their delivery formats. That keeps the highest-quality source in the chain for as long as possible.

What is dither and when do I use it?

Dither is a tiny amount of noise added when you reduce bit depth — for example from 24-bit down to 16-bit for CD — that prevents quantization distortion. Apply it only at the final reduction step, never repeatedly through the chain.

Why not just master in 16-bit to keep it simple?

Mastering in 16-bit costs you headroom and raises quantization noise while you still have EQ, compression and gain stages to do. Process at 24-bit for cleaner results, and reduce to 16-bit with dither only if a delivery format requires it.

Does bit depth change my loudness target?

No. Bit depth is resolution; loudness is a separate target. You still drive the master toward about −14 LUFS with a −1 dBTP true-peak ceiling regardless of bit depth. Loopin’s free browser mastering does exactly that and exports a 16-bit WAV.