Focus mode is the instrumental engine StillTune built for people who need music that recedes into the background instead of asking for attention. Every preset below is an Official Sound DNA recipe, tuned and published by the team rather than uploaded by the community. None of it is a file: press play and StillTune composes the phrase in real time, on your device, deciding which instruments carry the melody, how dense the chord changes are, and how much reverb sits under the bells. That's also why no two Focus sounds below sound quite the same, even though they share the same underlying engine and the same job: sitting behind study or deep work without becoming something to listen to instead.
The presets differ mostly in what sits underneath the melody, and how bright the top end runs. Rain Focus swaps the site's usual synthetic static for an actual rain texture, so it reads less clinical and more like working near an open window during a storm. Even the bell hits land a little differently against the rain pattern. Corner Café goes further in that direction, built from a real café-ambience recording instead of noise shaped to sound like one: room murmur, an occasional porcelain clink, nothing intelligible enough to compete with your own reading. First Light sits at the brighter end: white and pink noise under the most active bell pattern in the mode, better suited to the first hour at a desk than the fourth, when a denser, quieter preset usually wins out. If none of those match what's in your head, the Sound DNA recipe behind every preset here is fully open. Adjust the bell density, the noise floor or the reverb tail directly, and save your own version once it's right.
Focus sits at the brightest, most active end of StillTune's four modes: busier bell timing than Relax, no melody at all (that's the whole point of Drift), and none of Sleep's slow thinning-out toward silence (Deep Sleep, Sleep's heavier variant, thins out further still). That's deliberate. A study or deep-work session is meant to run for hours behind a task without ever building to a moment worth noticing.
None of the presets above carry a voice, and that's not just a style choice. Research on what psychologists call the irrelevant speech effect has found that intelligible lyrics compete for the same short-term verbal buffer your brain uses to read or write, whether you're paying attention to the words or not. That's the actual reason lyrical music tends to test as more distracting for reading-heavy work than instrumental music does. Every phrase in Focus mode is also built with a shape rather than dropped in at random: an opening, a development, a small peak, a resolution, so a long session keeps moving forward instead of settling into something your ear starts to predict and stops really hearing.
There's also nothing to download here. StillTune stores the score (the notes and their timing), not an audio file, so a Focus session running for an entire workday costs a few megabytes rather than gigabytes, and keeps generating new phrasing the whole time instead of looping back to a seam.