LONDON, UK - November 2025 - Coldplay's Music of the Spheres World Tour is a global concert trek without peer. Kicking off in San Jos , Costa Rica on March 18, 2022 and taking a hiatus following a ten-date residency at London's Wembley Stadium that concluded on September 12, 2025, the 225-show-to-date tour has performed in 80 cities across 43 countries.Supporting 2021's Music of the Spheres and 2024's Moon Music albums, the stadium run has been equally significant for its remarkable sustainability initiatives, reducing CO2 emissions by nearly 60 per cent compared to the band's previous outing. But the trek is far from over; it's expected to pick back up in 2027 with another massive leg in what the band have teased as 138 more shows to go.
If the tour's longevity is impressive, it pales in comparison to the tenures of some of its key crew, including Dan Green, Coldplay's FOH engineer and audio producer since 1998, and Tony Smith, head of audio system design and FOH tech, who has worked with Green for 23 of those years. Almost as remarkable, the lion's share of that timespan has found the duo working with DiGiCo worksurfaces.
I've been using DiGiCo since 2011, starting on the SD7, and have carried on ever since, says Green, who eventually bumped up his worksurface to a Quantum7 with a new Quantum engine. DiGiCo is just so versatile - it has so many ins and outs, and its matrixing is amazing. It's just very versatile.
In November 2024, when the tour headed to Australia, Green and Smith had the opportunity to switch the FOH mix over to a brand new Solotech-supplied DiGiCo Quantum852, and they jumped at the chance. The Q8 has been amazing - it just offers so much more workflow flexibility, Green enthuses. It's taken everything that was great about the Quantum7 and expanded upon that. The screens are amazing, obviously, and it enables me to have more layers and a lot more workspace on the desk. The Q8 is clearly the best of the DiGiCo bunch, so far.
Green notes that he particularly appreciates the Quantum852's onboard processing. The expanded Spice Rack has allowed me to free up some of my plugin chains, which I was using on outboard processors, and be more integrated into the console, which is really useful to have everything under my fingertips. The onboard filters are always the first thing that I go to for any channel that's coming into the desk. I use them to do the immediate cleanup of the low end if it's needed - or if the top end is needed to be cleaned up - and the Q8's filters work really well. I really like their sound. They've got a nice analog feel to them.
With the band performing on no less than three stages at each tour stop, a huge number of inputs are coming into the FOH console. I think it's around about 200 or so, plus another 32 channels of ambient microphones as we're recording every show. The Q8 is amazing because, as far as I know, it's the only desk on the market that would be able to handle that amount of inputs.
Speaking of I/O, the Quantum852 has been invaluable for its ability to provide exceptional feeds for broadcasters. Our recordings have far too many channels to be able to send out to a broadcast engineer; there's no way they'd be able to accept those channels, let alone mix them in a live situation, Green describes. The Quantum8 has so many auxes that I'm able to create submixes of all of my individual elements and send out 48 channels of stems to the broadcasters so that they've got a head start. In fact, they can line up their faders at zero, and that's a good starting point. They can recreate my mix and then adjust it to be tailored for whatever they're mixing for.
We're really proud of what we've achieved with the sonics of the Coldplay shows, and we always get nice comments back about the shows. Wherever you are in the venue, it's a great experience. And it's also great because the social feeds and broadcasts sound brilliant because of our stem system. We've had an incredible response to our Glastonbury performance from the BBC, so we are really pleased with how everything is sounding.
The tour's commitment to going green is embraced by all departments, including audio. Sustainability has been a big part of what we're trying to achieve for the tour, Green shares. In the audio department, we've tried to downscale our racks, whereas before I had a lot of analog hardware, lots of analog preamps, lots of outboard effects. And I'm really happy that now we've managed to reduce our setup down to the Quantum8 and basically one rack by the use of Fourier plugins and onboard effects, and processing on the desk. It's made a big difference.
Green and Smith actually started out with the beta version of Fourier Audio's transform.engine two and a half years ago, before it was officially launched, and were able to road test it by slowly integrating it into their setup. Fourier was really interesting to me as I was able to host the VST3 plugins that I use a lot in the studio, and I wanted to have the opportunity to bring these into a live context, says Green. I was really excited to beta test it. And as soon as we got the full working version - the official release - we put it into our system, and it's been fantastic. I've uploaded all of my effects onto the Fourier and have really enjoyed exploring VST3 plugins in a way that I wasn't able to do before.
With mixing live audio, I've always enjoyed using plugins because it enables me to switch things out and try different things on an almost nightly basis, if I want, he continues. Hardware is amazing and I love it, but it's quite restricting in the fact that once you've built a rack, you're normally stuc
