faq

Mastering is the final step in making a record. It’s the last chance to shape how your music sounds and the last chance to catch problems before it goes out into the world.

By the time a mix is finished you and your mixer have heard it hundreds of times. I come in with fresh ears and a room calibrated to be as neutral as I can make it. Most of my job is translation. A mix that sounds great on the speakers it was made on can turn thin in a car, harsh on earbuds or boomy on a club system. I adjust tone, dynamics and loudness so your song holds up on all of them.

Those adjustments are usually small. A good mix doesn’t need much, and I try to do as little as possible but whatever is possible. Mastering refines a mix rather than redesigning it. If something bigger needs to change, like a vocal that sits too low or a kick that disappears on small speakers, it’s usually better fixed in the mix and I’ll tell you so.

On an EP or album, mastering is also what makes the songs feel like one record. I balance level and tone from track to track and set the gaps and fades between songs so the whole thing plays the way you hear it in your head.

Then there’s the technical side. I check every master for clicks, distortion and peaks that could cause trouble downstream. Then I deliver the files your distributor, label or pressing plant needs: high-resolution masters for streaming, versions for video and sync, and vinyl or Dolby Atmos when the release calls for them.

Before any of that, I want to know what the song means to you and what you want people to feel when they hear it. Mastering is how that feeling survives the trip from the studio to everyone else. Most listeners will never think about mastering at all, and that’s the best sign it was done well. When a record I’ve mastered sounds particularly good, critics and reviewers usually praise the quality of the production or the mix. I take that as a compliment.

Maybe. I think the better question is whether your track will benefit from mastering, and the answer there is almost always yes.

There’s no predetermined decision in mastering. Every adjustment is made for your song and “do nothing” is always an option. If your mix is already exactly what it should be, it will leave my studio bit-identical to what came in.

Most of the time there’s something though, even if we disregard the obvious (loudness that translates). It might be a 0.2 dB lift across 45 seconds of a bridge so it opens up the way you always meant it to, or a particular amount or flavor of dither for CD releases, where dither becomes perceptible. It might be a touch less low end so the kick doesn’t overbloom on a car stereo. On paper these are tiny changes. In practice they can be the difference between a record that sounds right in the room where it was made and one that sounds right everywhere, for as long as people listen to it.

So I don’t treat mastering as a way to help your song compete by making it louder and brighter than whatever plays next to it. Trends come and go, and records made for one moment tend to show their age in the next. I suspect the music that lasts is rarely the music that was made to win a playlist. I’d rather your record hold up on earbuds today, in a car next year and on whatever we’re all listening on decades from now.

Mastering is also the last set of ears before release and the last chance to make sure that everything in the song is actually intentional. Even when the music doesn’t need any sonic adjustments, I perform a spectral pass to catch clicks, distorted peaks or attributes that won’t pass your distributor’s specs.

When a change that small can decide how well a song ages, mastering is a process worth taking seriously, whether your track ends up needing a lot or nothing at all.

Singles are $150. EPs and albums are quoted per project, so tell me about your record and I’ll send a quote. Alternate mixes (instrumentals, a cappellas, clean versions, etc.) are $25 each when you book them with your session.

Every project includes my complete digital delivery package. Vinyl, CD and Dolby Atmos masters are available for an additional cost. Apple Digital Masters and other sample rates are free on request.

REFs typically arrive within 5-7 working days once your invoice is paid and I have final mixes. After you approve a REF, final masters usually arrive within 1 working day.

48-hour rush is usually available for singles. If you need an EP or album faster, get in touch before booking.

Listen to your REFs wherever you listen most. Then tell me what you’re hearing or not hearing and what you’d like more or less of. I’ll make a new REF until you’re happy.

Revisions requested more than 10 days after final delivery may cost extra.

No. A test master takes the same time and gear setup as any other song, so I’d have to bill for it like one. Instead, listen to my work on my Tidal playlist.

If it’s our first time working together, I’ll often send two REFs in different directions so you can hear your record a couple of ways before you choose.

Yes. You can attend in person at my studio in San Diego or over webcam with a lossless audio stream. If you’d rather not attend, I’ll handle everything remotely and send REFs when they’re ready.

I listen to every mix before mastering. If something would be better fixed in the mix, like a vocal that sits too low or a kick that disappears on small speakers, I’ll tell you before I start. Want more detailed notes? Check the box on the booking form or just ask.

Singles are invoiced directly. EPs and albums get an estimate first, then an invoice once you accept it. You can pay online, or by PayPal, Venmo or Zelle. Your project goes in the queue once the invoice is paid.

Mastered by Sam Kumar Tandon at Rose Quartz Mastering. If you post about the release, tag @rosequartzmastering so people can find me.

I archive final masters for one year as a courtesy, but keep your own backups.

Send the mix everyone has approved as a stereo WAV or AIFF at your session’s sample rate and the highest bit depth you can. If it’s part of the mix leave it on. If it isn’t turn it off. Nothing should clip. Listen all the way through before you send it. The full checklist is on the Mix Prep page.

If you already have an Atmos mix, send me the ADM BWF and I’ll master it. If you need one, a wet multitrack of the approved stereo mix is my preference and stems work too. Check out my Dolby Atmos prep guide before you print.

Absolutely. Every project includes my standard digital package: 24-bit WAVs at your mix’s native sample rate, 24/48 for video, 16/44.1, an MP3 preview and a 32-bit float archive. Apple Digital Masters, CD (DDP), DSD, vinyl and Dolby Atmos masters are available too.

The full breakdown is on the Formats page. Not sure what your release needs? Just ask.

Immersive or spatial audio is music mixed in three dimensions.

A stereo mix places every sound somewhere between two speakers. An immersive mix can place sounds all around and above you: the vocal anchored in front while the instrumentation and effects opens up behind and overhead.

Each sound in the mix carries its own position and your device renders it for whatever you're listening on, whether it be headphones, a soundbar, a car, or a full speaker system. Most listeners will hear immersive audio on headphones.

Dolby Atmos is the standard for immersive music. It streams on Apple Music, Amazon Music, and Tidal, and Apple Music calls it Spatial Audio. Sony's 360 Reality Audio has mostly faded out: Tidal pulled it in July 2024, leaving Amazon Music as the only major service still supporting it. I work in Dolby Atmos.

An Atmos Master has its own Atmos mix, released alongside the stereo master. Listeners whose setup supports immersive audio will have the option to listen to the Atmos version, while everyone else will be limited to a stereo presentation.

I build every Atmos mix from a wet multitrack (preferred) or stems of your approved stereo mix and shape it based on the stereo master so that both versions sound and feel like the same record. See my Dolby guide for what I need from your mix engineer. If you already have an Atmos mix, I can master it from the ADM BWF.

Rose Quartz Mastering is an approved Apple Digital Masters provider. Apple Digital Masters do not incur an additional charge, but since the adoption of Apple Hi-Res Lossless streaming, I no longer deliver these files by default. If you need files suitable for Apple Digital Masters, just let me know and I’ll include them in your _DIGITAL delivery.

When delivering these files to Apple, they will request the following information to confirm that the Apple Digital Master was created by an approved mastering house:

Name of Mastering Engineer: Sam Kumar Tandon
Name of Mastering House: Rose Quartz Mastering
Engineer’s Email Address: sam[at]rosequartzmastering.com

In order for your album's information to show up on a CD player's screen, your car stereo, or your computer, you need to submit your album info to Gracenote's online database. It's completely free and you can do it from iTunes. I assume no responsibility for submitting your information to said database. 

Gracenote’s database is not metadata. I will embed as much or as little metadata as you’d like in your production masters.

There is a lot of information about this topic on the internet. It is my philosophy that the best LUFS level is dictated by the song and typically falls within a range that has a correlation to the song’s macrodynamic, microdynamic, and spectral profile. Sometimes, that LUFS matches normalization standards. It often does not. That being said, it’s your song, so if you have a specific LUFS or RMS target in mind, let me know and I’ll hit it.

True peak levels and intersample peak levels are distinct from PCM/sample peak levels. Sample peaks are measured at individual digital sample points and typically conform to a digital ceiling of 0.0 dBFS. In lossless distribution scenarios, sample peaks can be as high as -0.1 dBFS (or even 0.0) without causing distortion before digital-to-analog conversion. However, in lossy distribution scenarios, such as converting a lossless .WAV file to a lossy .OGG file for streaming on platforms like Spotify, sample peaks above -1.0 dBFS are more likely to result in distortion. This distortion occurs because lossy encoding alters the waveform, and small differences in sample placement can lead to "overshoots" beyond the original peak levels. To prevent this, it is a common best practice to keep sample peak levels below -1.0 dBFS for lossy distribution if cleanliness is a priority.

All of this occurs before the digital audio is even converted to analog waveforms that can be amplified by speakers or headphones. But what about distortion introduced during the digital-to-analog conversion process itself? This is where intersample peaks come into play. While sample peaks only measure the height of individual digital samples, intersample peaks estimate the height of the reconstructed analog waveform. During digital-to-analog conversion (DAC), interpolation occurs to create a smooth, continuous signal. This interpolation, typically based on sinc filtering, can result in peaks that exceed the values of the original PCM samples. Consequently, even if a song’s sample peak maximum is below -0.1 dBFS, its intersample peaks may exceed 0.0 dBFS, leading to clipping in DACs that lack sufficient headroom.

Not all DACs handle intersample peak clipping equally. Higher-end DACs often use oversampling and headroom to manage intersample peaks gracefully, while cheaper or older DACs may distort or clip audibly. This variability explains why some DACs are described as handling clipping with "poise and elegance," while others sound "disgusting" under the same conditions.

To manage intersample peaks, I sometimes apply true peak limiting, which is a process that accounts for potential intersample overshoots. This process ensures that the maximum reconstructed analog peak does not exceed 0.0 dBFS — as in, no DAC distortion. The decision to prioritize sample peak limiting or true peak limiting depends entirely on the music. For example, if intersample overages occur primarily during sharp percussive onsets (like a snare drum), a version limited to sample peaks may retain more impact and punch than a true-peak-limited version, which could soften these transients. On the other hand, if intersample peaks are prominent during legato or resonant passages, true peak limiting can prevent smearing, distortion, or obfuscation in the playback system, resulting in a cleaner, more transparent listening experience.

In 2024, I shifted from delivering 24-bit 96 kHz .WAV masters to delivering 24-bit native rate .WAV masters. I offer masters at virtually any sample rate and bit depth at no additional charge. If maximum resolution is your goal, consider exploring Direct Stream Digital.

Sure! Just ask!

No. I offer stem mastering and Dolby Atmos mixing services — and I need a stereo mix as a reference for both processes. I am happy to provide introductions to reputable mixing engineers.