
Trusted engineer for David Guetta & more — now offering monthly subscriptions for mixing, mastering & multistem mastering.
🔊 Consistent, Release-Ready Sound – On Subscription.
Hey! I’m Danny Guillen — a London-based mix & mastering engineer with over 10 years of experience behind the desk and on the road. I’ve worked with artists like David Guetta, Right Said Fred, Matt Lucas... and over 1000 gigs across Europe.
In the studio, I've had the privilege of working with people from Matrix Studios, where legends like Adele, Dire Straits, and Amy Winehouse have recorded. My career has always been about bringing sonic clarity, emotional punch, and high-impact sound to every project I touch. I have currently 3 Music studios ready to be Hired upon request.
I specialize in helping artists and producers get the radio-ready mix and master they need — whether you’re just starting out or releasing tracks regularly. I offer subscription-based services to give you more consistency, speed, and zero per-song fees.
Q: What’s included in the subscription?
A: Unlimited songs (1 active at a time), fast turnaround (72h), and built-in revisions depending on your tier. Add-ons are available for rush delivery, multistem mastering, alternate versions and more.
Q: What if I need a faster turnaround?
A: Express delivery (48h) and rush delivery (24h) are available as paid add-ons. These are limited weekly and depend on availability.
👉 DM me
Tell me about your project and how I can help, through the 'Contact' button above.
6 Reviews
Endorse Danny Guillen- check_circleVerified
Working with Danny was nothing short of a transformative experience. From the moment we stepped into the studio, his deep understanding of sound and musicality was apparent. But above all, he bought a wonderful energy into the studio allow everyone in the session to feel at ease. I highly recommend Danny for any kind of project, recording, mixing and mastering. Pete Boxsta Martin - James Arthur, Jesse J, Mali Music.
- check_circleVerified
Working with Daniel Guillen on the mixing and mastering of my album was an absolute game-changer.
Danny brought out the best in every element—balancing clarity, depth, and emotion with an expert touch.
His ear for detail is exceptional, and he consistently made creative decisions that elevated the songs far beyond what I imagined.
What really sets Danny apart is his ability to understand the artistic vision and enhance it without ever compromising the vibe. Working with Danny was nothing short of a transformative experience. From the moment we stepped into the studio, his deep understanding of sound and musicality was apparent. But above all, he bought a wonderful energy into the studio allow everyone in the session to feel at ease. I highly recommend Danny for any kind of project, recording, mixing and mastering.
Pete Boxsta Martin - James Arthur, Jesse J, Mali Music.Working with Danny was nothing short of a transformative experience. From the moment we stepped into the studio, his deep understanding of sound and musicality was apparent. But above all, he bought a wonderful energy into the studio allow everyone in the session to feel at ease. I highly recommend Danny for any kind of project, recording, mixing and mastering.
Pete Boxsta Martin - James Arthur, Jesse J, Mali Music.Working with Danny was nothing short of a transformative experience. From the moment we stepped into the studio, his deep understanding of sound and musicality was apparent. But above all, he bought a wonderful energy into the studio allow everyone in the session to feel at ease. I highly recommend Danny for any kind of project, recording, mixing and mastering.
Pete Boxsta Martin - James Arthur, Jesse J, Mali Music.Danny is such a humble person and a great musician, I love working with him and will do so in the future!! Can highly recommend.
Interview with Danny Guillen
Q: Tell us about a project you worked on you are especially proud of and why. What was your role?
A: One project I’m especially proud of was working with Right Said Fred during their week of rehearsals for a tour. This time allowed me to fine-tune everything directly from the source. I didn’t need to use a single EQ and only relied on a few compressors, but the result was an album-quality sound on the road every night. The details we worked through in the rehearsal room really made the music speak volumes. It was a tough process — I’m very particular and perfectionistic, which can be hard on everyone involved — but the results were absolutely worth it. When the crew heard the ST mix coming from the PA, they couldn’t believe how good it sounded. Being able to capture that kind of clarity and energy from the ground up, without over-processing, was an incredibly rewarding experience.
Q: What are you working on at the moment?
A: I’m currently juggling multiple projects — some are private due to confidentiality agreements, but I’m also working on some really exciting music. One artist I can mention is Evin, an up-and-coming talent who's about to release his debut album. You can catch him on Channel 4 next Saturday — definitely something to look out for! In addition to my client work, I’m always striving to improve. Right now, I’m doing a masterclass with a multi-Grammy-winning engineer to fine-tune my mixing skills. For me, it’s a never-ending learning experience. I’m constantly hungry for knowledge and love exploring new techniques to stay at the top of my game. Curiosity drives everything I do.
Q: Is there anyone on SoundBetter you know and would recommend to your clients?
A: I’m new to SoundBetter, so I don’t personally know anyone on the platform just yet. That said, I’m really looking forward to connecting, collaborating, and discovering great talent here. Once I get the chance to work with more of you, I’ll definitely be updating this section with recommendations. Here’s to building something great together!
Q: Analog or digital and why?
A: Analog or digital? It really depends on what you’re after. They’re not better or worse — they’re different. Analog gives you a certain warmth and color that’s hard to replicate, while digital offers flexibility, precision, and recallability, which is crucial for modern workflows. Most of the industry is digital now simply because it's faster, more efficient, and easier to revisit sessions. If you want to go fully analog, be ready for a much bigger investment — both in time and budget. But for some styles and sounds, it's absolutely worth it. At the end of the day, it's not about the gear — it's about using the right tools to serve the song.
Q: What's your 'promise' to your clients?
A: My promise to clients is simple: I’ll only do what’s needed — and nothing more. I treat every track with honesty and respect. If something already sounds amazing, I won’t touch it just to justify my involvement. In fact, I once received a song that sounded so good, I genuinely enjoyed listening to it as a fan — and at the end, I told the artist nothing needed to be done. That exact version got released. I'm not here to stamp my name on your music — I’m here to help it reach its full potential, whatever that may look like. I’ll give you my ears, my experience, and my full attention — always in service of your vision.
Q: What do you like most about your job?
A: What I love most about my job is really simple: music has been my whole life. I’ve been involved in it and making a living from it since I was 11 — it’s not just what I do, it’s who I am. This isn’t just about technical skills or fancy gear (though I love that too) — it’s about helping people tell their stories through sound. I’m just a music lover at heart. Every project is a new world to explore. Getting to be part of someone’s creative journey — whether it’s polishing a song, shaping a vibe, or just making something feel right — is what keeps me inspired every day.
Q: What questions do customers most commonly ask you? What's your answer?
A: The most common question I get is: “Can you make it sound like... My answer is always: Absolutely — but let’s make sure it still sounds like you. I’ll use the reference to understand your sonic goals, but I won’t just copy-paste someone else’s vibe onto your music. My job is to bring your track to the highest level while preserving your identity as an artist. Another one I get a lot is: “How long will it take?” I usually deliver within 72 hours, but I always tell clients: quality first. If something needs more time to really shine, I’ll communicate that early — and if we’re on a subscription, I’m always focused on one project at a time, giving it full attention. Lastly, they often ask: “How many revisions do I get?” All of them. I offer unlimited revisions because I want the song to feel just right — no clock-watching, just collaboration until you are happy.
Q: What's the biggest misconception about what you do?
A: One of the biggest misconceptions about what I do is that audio is some kind of black magic — or that AI can do it better now. The truth is, mixing and mastering aren’t just about plugins and presets — it’s about emotion, taste, and deep listening. There’s nuance in every track that only a trained human ear can really shape properly. It might look like we’re just pushing faders, but every decision comes from experience, context, and feel. The tech is amazing, but it doesn’t replace the instinct of someone who’s been doing this for years and understands what a song needs — not just what it measures on a meter.
Q: What questions do you ask prospective clients?
A: Before we start working, I always ask a few key questions to make sure we’re aligned: What’s your vision for the song? What are you hoping to feel or make others feel when they hear it? Do you have any reference tracks? Songs you love sonically or emotionally help me understand your taste and expectations. What’s the story or message behind the track? The more I understand the heart of the song, the better I can shape the mix to match it. How involved do you want to be in the process? Some clients want to give feedback every step of the way, others prefer a more hands-off approach — I’m happy either way. Are there any specific do’s or don’ts? Whether it’s vocal treatment, effects, or arrangement choices, I like to know what’s sacred to you from the start. Ultimately, I just want to make sure I’m delivering something that feels true to your identity as an artist.
Q: What advice do you have for a customer looking to hire a provider like you?
A: My biggest advice for anyone looking to hire someone like me is: know what you want. Have a clear idea of your vision — a reference playlist within the same genre really helps. It gives us both a shared language and helps me get you the results you’re after, faster. Also, keep your ears fresh. If you overlisten to a track, your brain gets used to the old version — so any change might feel “off” at first, even if it’s technically better. Take breaks, reset your ears, and trust the process. And finally, be open and honest about your ideas — I always welcome creative input. Just know that if I gently advise against something, it's because I have your song's best interest at heart. If you still want to go for it, no problem — just don’t blame me later, because I did tell you so 😄
Q: If you were on a desert island and could take just 5 pieces of gear, what would they be?
A: If I were on a desert island and could take just five pieces of gear, they would be: A solar panel — because, well, I need power to keep going! A laptop — for all the essential software and files I’d need to keep mixing. A Shure SM57 — it’s an apocalypse ready mic that I can use for everything from vocals to instruments. Headphones — a good pair of headphones is a must for mixing on the go, especially in an isolated environment. A set of faders — because tactile control is essential for making precise adjustments and staying connected to the music. With these tools, I’d be able to keep mixing and producing, even in the most remote of locations.
Q: What was your career path? How long have you been doing this?
A: My career started in an unexpected way — I was asked to do sound at Slim Jim’s, a local venue. One day, the owner approached me and asked, "What are you doing to hear the vocalist? I've worked here for 20 years, and I’ve never heard the vocalist sound like this." Honestly, I didn’t even know how to answer, but the positive feedback I received motivated me to keep learning and growing. I invested in myself, seeking out the best teachers in the game, and continued honing my skills. As time went on, I had the opportunity to go on tour with David Guetta, which was a massive turning point in my career. That experience opened doors and set the stage for everything I’ve done since. To this day, my work is rooted in quality — that’s why clients keep coming back. And if they go somewhere else, many often return saying, "Sorry for being stupid — I thought I could get something better, cheaper, or just because of the credits." That kind of loyalty is something I take great pride in.
Q: How would you describe your style?
A: I’d describe my style as natural. I’m not a fan of anything that sounds artificial — I want every element in a mix to feel alive and organic. Whether it’s a vocal that breathes or drums that groove, I focus on keeping the authenticity of the sound intact. I love making sure the emotion of the song comes through in its purest form, unless the song calls for things to be unnatural or the client specifically wants it that way.
Q: Which artist would you like to work with and why?
A: I’d love to work with Bruno Mars. He’s one of the few artists who consistently delivers exceptional songwriting and production — it’s impossible to ignore the level of detail and emotion he puts into every track. His blend of classic influences with modern flair speaks to my taste in music. His ability to create infectious melodies, combined with the groove and dynamics in his productions, is something I admire and would love to bring my touch to.
Q: Can you share one music production tip?
A: One music production tip I swear by is: louder doesn’t always mean better. It’s easy to get caught up in pushing levels for impact, but true power in a mix comes from clarity, balance, and dynamics. Instead of always cranking things up, focus on making each element in your track sit right where it needs to be. Trust your ears and always check at matched volumes — that's when you’ll hear the real magic. An extra tip is to remember: everything is laying to you — your room, your speakers, your setup. The sooner you get your head around the way sound behaves in your space, the better you’ll become at translating what you hear to the final mix. Invest time in getting your environment right; it pays off in every session.
Q: What type of music do you usually work on?
A: I’ve worked on just about every genre known to mankind — from pop, rock, and hip-hop to jazz, reggaeton, house, funk, soul, and orchestral. My background in both live and studio environments has exposed me to a massive range of styles, and I genuinely enjoy diving into the sound and vibe of each one. That said, I have a soft spot for anything with emotion and groove — whether it’s a stripped-back ballad or a hard-hitting banger, I focus on enhancing what makes the track feel alive.
Q: What's your strongest skill?
A: My strongest skill is translation — making sure a mix sounds powerful and emotional whether it’s played on studio monitors, car speakers, phone earbuds, or a massive PA system. I’ve spent years training my ears through both live sound and studio work, so I know how to sculpt mixes that connect everywhere — not just technically, but emotionally too. Beyond that, I bring expression. My mixes are anything but flat or boring — I focus on movement, dynamics, and feel. Whether it’s a vocal that gives you goosebumps or drums that hit just right, I make sure the soul of the track shines through. I don’t just mix songs — I give them life
Q: What do you bring to a song?
A: I bring a fresh ear and a popular ear — I understand what makes a song connect emotionally and sonically with listeners today. Coming from years of live sound experience and having mixed hundreds of shows and records, I’ve developed a keen sense of clarity, energy, and musical impact. I don’t just aim for a technically clean mix — I want the song to feel right. Whether it’s giving a vocal space to breathe or tightening a groove to make it hit harder, I focus on preserving the artist’s vision while enhancing the dynamics and excitement. Working in studios like Matrix and Osea Island has taught me how to translate intimate performances into records that sound big, clear, and honest. I treat every song like it deserves to be heard on the world’s best stages — because it does.
Q: What's your typical work process?
A: Clients usually send me projects either as Logic or Pro Tools sessions, or as exported stems — sometimes raw, sometimes with effects printed on a separate track for reference. I start by organizing everything into a clean, efficient session — what I call "organizing the song." I don’t add anything at this stage — I just make sure the structure and sound palette are ready for a focused, creative mix. Some tracks come straight from recording, which gives me full freedom to shape the atmosphere and energy. But I actually prefer working with well-crafted productions where the artist and producer have already shaped the sound — those tend to have a stronger vision and philosophy behind them, which I love honoring and enhancing. Coming from a live sound engineering background, I see myself more as a fixer than a creator — I focus on elevating the music without taking over its soul.
Q: Tell us about your studio setup.
A: I work out of several world-class studios, including Matrix Studios in London, a legendary space that has hosted iconic artists such as Queen, The Clash, The Police, and Oasis. This studio has been a cornerstone in the evolution of British music for nearly 50 years. Matrix Studios Additionally, I operate from two exceptional studios on Osea Island: the Manor House Studio, equipped with an SSL desk, a vast array of classic microphones, and vintage outboard gear like the LA-2A and DBX 160, providing the perfect environment for high-end mixing and mastering. The Captain’s House Studio is tailored for live band recordings, capturing authentic performances in a beautifully designed space. Notably, Osea Island has attracted artists such as Stormzy, George Ezra, Jessie J, Rihanna, and Charli XCX, who have utilized its unique setting for writing and recording sessions.
Q: What other musicians or music production professionals inspire you?
A: I'm inspired by engineers like Manny Marroquin and Serban Ghenea — their attention to space, punch, and emotion in a mix is masterful. I also admire the raw sonic storytelling from artists like James Blake and Bon Iver, and producers like Rick Rubin for his minimalist, artist-first approach. Working in studios where legends like Amy Winehouse, Adele, and Dire Straits recorded has also shaped my deep respect for timeless sound and performance.
Q: Describe the most common type of work you do for your clients.
A: specialize in mixing and mastering for artists and producers who want their music to sound polished, powerful, and competitive across platforms. Most of my clients send me full-track productions (usually 10–30 stems), and I help shape their creative vision into a clear, spacious, and emotionally impactful final mix. I also offer multi-stem mastering for producers who are close to the sound they want but need that final professional edge. Unlimited revisions are always included — we keep going until you're fully satisfied.

I was the MIXER AND MASTER in this production
- Mixing EngineerAverage price - $200 per song
- RemixingAverage price - $150 per song
- Mastering EngineerAverage price - $80 per song
- Recording StudioContact for pricing
- Dolby Atmos & Immersive AudioAverage price - $300 per song
- Live SoundAverage price - $350 per concert
- Podcast Editing & MasteringAverage price - $50 per podcast
I run a unique subscription-based audio service, perfect for artists who need consistency, speed, and high-quality results without paying per song.
No editing or tuning Included.
- Bruno Mars
- Lady Gaga
- Skrillex
- 1176
- H3000
- LA-2A
- DBX160
- U47
- SSL
First 5 clients to Opt in the subscription base service at 200 GBP per Month