Analog vs Digital Mastering: Do You Really Need Analog?

This guide explains what actually happens in an analog mastering chain, what the hardware adds and what it doesn’t, how analog compares with digital mastering, and how to decide for your own song. We offer both: our mastering service is done in the box by default, with analog mastering as an option, so there is no reason for us to oversell either one.

What is analog mastering?

In analog mastering, the engineer plays the mix out of the computer through a digital-to-analog converter, sends it through a chain of hardware units, and records the result back into the computer through an analog-to-digital converter. The final steps, such as limiting to the release level, metering and creating the delivery files, are almost always digital.

So in practice nearly every “analog master” today is hybrid: part of the processing happens on hardware, part on plugins. The real question isn’t analog or digital, it’s whether the song gains anything from passing through hardware at all.

What an analog mastering chain looks like

There is no standard chain. Each engineer builds one around the gear they trust, and the order changes with the song. A typical chain contains some of these stages:

1. Conversion out. A D/A converter turns the mix into an analog signal.
2. EQ. Broad tonal moves: a little more weight, a softer top, more air. Passive and tube EQs are popular in mastering because wide, gentle curves on them tend to sound smooth.
3. Compression. Usually gentle, one or two units, to glue the mix and control the overall dynamics rather than to make it loud.
4. Colour. Some engineers add a tape machine, such as the Studer above, a saturation unit or a transformer stage for harmonics. Many chains have none of these.
5. Conversion back. An A/D converter records the result into the computer. The quality of both converters matters, because the whole mix passes through them.
6. Digital finishing. Limiting, final level, metering, dithering and export for streaming, CD or vinyl.

The chain we use

Our analog mastering chain is the outboard listed on our mastering page and on About us:

• Focusrite 315
• Fairman TMEQ (tube EQ)
• Elysia Alpha Compressor
• Manley Variable MU (tube compressor)
• SSL Bus+
• Manley Massive Passive (tube EQ)

Not every unit is used on every song. The engineer chooses which stages the track needs and does the rest on plugins.

What about converter clipping?

Some mastering engineers drive the A/D converter slightly into clipping and use it to shave off the last peaks instead of a digital limiter. It’s a known technique, and on the right material it can sound denser than a limiter. It can also sound harsh. Like everything else in the chain, it’s a taste choice, not something a master needs.

Analog vs digital mastering: which to choose?

Both can produce a release-ready master. They differ in how they get there:

Choose analog when you want a specific colour you’ve heard and liked. Choose digital when you’re unsure, when the mix is already as dense and saturated as you want it, or when you expect many revisions.

What analog gear actually adds

Analog circuits don’t pass the signal through perfectly. The small imperfections are the whole point:

• Harmonics. Tubes, transformers and tape add frequencies above each note (see below). In small amounts they make a mix sound denser and more solid.
• Compression that follows the music. Many hardware compressors change their behaviour with level and frequency content, which can glue a mix in a way that’s hard to set up with one plugin.
• Soft peaks. As a signal approaches a unit’s limits, the peaks get rounded off gradually instead of clipping hard.
• A gentle top end. Tape and some circuits roll off the extreme highs slightly.
• Noise. Every unit and every conversion adds a little. Usually inaudible, but it adds up on quiet acoustic music.

Each unit does this differently, which is why engineers end up with favourite pieces of gear. None of it fixes a mix. A muddy low end, a buried vocal or harsh cymbals come out of analog gear just as muddy, buried and harsh.

Harmonics: even and odd

Harmonic distortion adds new frequencies at whole-number multiples of the original. For a 300 Hz note, the harmonics are 600 Hz (2×), 900 Hz (3×), 1.2 kHz (4×), 1.5 kHz (5×) and so on, usually getting quieter as they go up.

• Even harmonics (2×, 4×, 6×: 600 Hz, 1.2 kHz, 1.8 kHz) are octaves and near-octaves of the note. They tend to sound full and smooth. Many tube circuits produce mostly even harmonics.
• Odd harmonics (3×, 5×, 7×: 900 Hz, 1.5 kHz, 2.1 kHz) sound edgier and more forward. Tape and transformers lean more towards odd harmonics.

Most real devices produce a mix of both, and the balance changes with how hard you drive them. More is not better: too much saturation flattens transients and makes a master tiring to listen to.

Can plugins replace analog gear?

For most songs, yes, close enough that the difference is smaller than the mix decisions around it. Emulations of classic EQs, compressors and tape machines have improved a great deal, and many engineers master entirely in the box. You can get harmonic colour from a good saturation plugin without any hardware.

What hardware still offers is a particular unit’s behaviour when it’s driven, and a different way of working: a few knobs, decisions made by ear, no endless options. Some engineers hear a difference that matters to them; others don’t. Both views are reasonable. What is not reasonable is the claim that a master can only sound professional if it went through hardware.

How to compare fairly

If you ever compare an analog master with a digital one, match their loudness first. A version that is even 1 dB louder usually sounds “better” to everyone, and that alone decides most A/B tests. Level-matched, the differences are often much smaller than expected, and sometimes they go the other way.

When analog mastering makes sense, and when it doesn’t

It depends on the song more than on the genre, but some patterns are common.

Analog is often worth it when:

• the mix is dynamic and fairly clean, for example acoustic, jazz, folk, soul, singer-songwriter or rock recorded with live players;
• the mix sounds a little thin or sterile and you want density without adding more plugins;
• you’ve heard a hardware master of a similar song and liked that sound specifically.

Analog usually adds little when:

• the mix is already heavily saturated and compressed, as many modern electronic, hip-hop and pop mixes are;
• the song needs precise fixes, such as one harsh frequency or a resonant bass note, which digital tools do more cleanly;
• you expect many revisions or alternative versions (clean edit, instrumental) that must match exactly.

Genre is only a starting point. An electronic track with live instruments can benefit; a sparse acoustic recording that already sounds right can be left alone.

Myths about analog mastering

• “Analog always sounds warmer and better.” It sounds different. Whether that’s better depends on the song and on the engineer’s choices.
• “Professional releases are mastered on hardware.” Many are, and many are mastered entirely in the box. What decides how a release sounds is the mix and the engineer’s choices, not where the processing happened.
• “Analog mastering will fix my mix.” No chain fixes balance problems. If the vocal is too quiet in the mix, it will be too quiet in the master. That’s a mixing job.
• “Vinyl needs analog mastering.” Vinyl needs a master prepared for the cut (low end, sibilance, stereo width, levels), which is a different thing. See what mastering for vinyl involves.
• “Analog makes the master louder.” Loudness comes from the final limiting, which is digital either way. There is no fixed loudness target: streaming services turn songs down to their playback level (Spotify plays at about −14 LUFS), and released masters range widely. Our guide to how loud a master should be covers this.

Do I need analog mastering? How to decide

1. Get the mix right first. Send it with no processing on the master bus and peaks around −6 dB, so the mastering engineer has room to work. Our guide to how loud a mix should be before mastering explains why.
2. Pick a reference. Choose a released song whose sound you want. If it has the dense, rounded character described above, analog may be worth trying.
3. If you’re 100% sure you want that colour, choose analog.
4. If you’re unsure, choose a standard digital master. A good in-the-box master is release-ready on its own.
5. Ask the engineer. A good engineer should be able to tell you why the hardware would help this particular song, or tell you it won’t.

If you’d like an opinion on your track before deciding, send it for a free review. An engineer will tell you whether the mix is ready for mastering and what is holding it back.

How much does analog mastering cost?

Analog mastering usually costs more than digital, because of the hardware, its maintenance and the extra time each pass takes. Our prices, from the order forms:

• Mastering: $50 per song, in the box. Analog Mastering is an add-on for $50 per song, so a master through the outboard chain is $100 per song.
• Complete Mixing and Mastering: from $133 per song, mixed and mastered in the box. The same Analog Mastering add-on is available for $50 per song.
• Upgrade Mixing and Mastering: $270 to $460 per song depending on track count. Our chief engineer, Max Rayden, mixes and masters the song himself through our hybrid chain, the Rupert Neve Designs 5088 console and analog outboard together with plugins. The analog mastering pass is included, and Max checks your recordings before the mix. Up to 4 days per song.

Mastering and Complete are delivered in 2–3 days per song, and every order includes 6 revision rounds. Prices are for songs up to 5 minutes; the order form shows the exact total before you pay. For a wider look at mastering prices, see how much mastering costs.

Want analog on the mix as well as the master? That’s what Upgrade is for. If you only want the analog colour on a finished mix, the Analog Mastering add-on is the simpler choice. Our article on hybrid mixing explains how hardware and plugins are combined during the mix.

Rather have a release-ready master done by an engineer? Our engineers master your finished mix for $50 per song, back in 2–3 days per song, with 6 revision rounds included.