Why you shouldn't convert your master to 16-bit/44.1 kHz for streaming

“Convert your master to 16-bit/44.1 kHz before uploading to your distributor.”

The advice everybody repeats.

For years this was one of those pieces of advice people repeated without really questioning it. But when you look at how modern streaming platforms actually process audio, the logic falls apart pretty quickly.

Let’s break it down.

The myth: streaming platforms need a 16/44.1 master

Many engineers still assume that Spotify, Apple Music and the rest want a CD-quality file.

The reality? Most platforms would rather receive the highest-quality source available and perform any necessary conversions themselves.

Think about it this way:

• A 24-bit master contains more information than a 16-bit master.
• Converting 24-bit to 16-bit is a lossy process.
• Once that information is removed, it can never be recovered.

So why throw away data before the streaming platform even touches your file?

Spotify converts your audio anyway

When Spotify receives a high-resolution master, it doesn’t simply stream it as-is. It runs its own sample rate conversion and encoding before creating the final files used for streaming.

That means Spotify is already optimised to work from a high-quality source. The better the file you give it, the more information its encoder has to work with. That’s why sending a 24-bit master makes far more sense than reducing it to 16-bit beforehand.

Apple Music: high-resolution files matter even more

Apple works a little differently, because it offers both lossy and lossless streaming.

• Lossy: Apple performs whatever processing is necessary while trying to preserve as much quality as possible.
• Lossless: this is where it gets really interesting.

Apple can preserve your original master resolution all the way up to 24-bit/192 kHz. So a high-resolution master isn’t just useful during encoding. It may actually become the file your listeners hear on Apple’s lossless service.

The real risk: every extra conversion can do damage

Many mastering engineers argue that distributors and aggregators should avoid modifying masters at all. Their job should simply be:

1. Receive the master.
2. Deliver the master.
3. Let the streaming platform handle the rest.

Every additional conversion introduces another opportunity for quality degradation, rounding errors or unnecessary processing. Even when those changes are small, they rarely bring any benefit.

Simplify: one master is usually all you need

Years ago, engineers often built multiple versions of the same master: CD master, streaming master, iTunes master, distributor master, archive master. You name it.

Today that complexity is largely unnecessary. Most modern platforms are perfectly capable of creating the formats they need from a single high-quality source file. Keeping one master also reduces confusion and kills the risk of accidentally delivering the wrong version.

Best practice today

For most releases:

• Deliver a 24-bit master.
• Keep the original sample rate of the project. If you set the session at 96 kHz and render from there, even better.
• Avoid unnecessary conversions.
• Let Spotify, Apple Music and the rest do their own encoding.

The goal is to give them the best possible source file, so their systems can do the best possible job. Less conversion, less opportunity for mistakes.

Credit where it’s due: big shoutout to @bradblackwood on Instagram for sharing this information.