Lofi keys are a soft attack, a little detune, a closed filter, space and movement. Build them from a synth and keep the haze playable from the mod wheel.
The keys under a lofi beat sound like a piano or an electric piano heard through a wall, a little late at night, off a tape that has been played too often. No single setting makes that. It is the sum of four small faults: an attack that is softer than a real hammer, pitch that wanders slightly, a top end that has been taken away, and a space around the notes that never quite settles. Most people reach for a sampled piano and a lofi effect. You can build the same character on a synth, and then you control each fault on its own.
A sampled piano gives you a realistic attack and asks you to blur it. A synth starts from the blur and lets you add as much attack as the part needs. Two oscillators give you the body, a short noisy or felt transient gives you the hit, and everything else is filtering and movement you can automate.
The other advantage is that the haze can be played. On a sample with an effect chain, the amount of lofi is a fixed mix setting. On a synth patch the filter and detune can sit on the mod wheel, so a chord can open on the downbeat and close again by the end of the bar. That movement is what makes the part feel alive instead of filtered.
Use two oscillators, a sine or triangle and something a little brighter, for the sustained tone. Give the amplitude a short but not instant attack and a medium release. Layer a short felt or noise transient on top for the moment the key is struck, so you can make the hit softer without losing the note's definition.
Detune the second oscillator by a few cents against the first and add a slow, small random drift to the pitch. You are aiming for the wobble of a worn tape, not a chorus effect. If you can hear the pitch moving as a pitch, back it off.
Low pass the patch until it sounds like it is in the next room, then map the cutoff to the mod wheel. Play the chord progression and ride the wheel: open slightly on the change, close as the chord sustains. This is the single move that makes the part sound performed.
A slow chorus, a short dark delay and a long soft reverb finish the sound. Keep the reverb darker than the dry patch so the space reads as distance. A little noise underneath, quieter than you think, ties it together. For the tape and vinyl texture itself, tape, vinyl, VHS and radio explains what each kind of wear adds.
FOG KEYS is a keys synth built around exactly those moves. Its FOG knob turns filter, detune, space and movement together, each by its own amount set in the preset, so low FOG is clear and high FOG is haze. The sound comes from five layers: two oscillators, a felt hit for the attack, FM for shine and a little noise.
Send the mod wheel to FOG and you play the whole haze in and out with one hand, or send it to CUTOFF if you only want the filter. Sixteen voices with poly glide let every note of a chord slide to the next one. The chords still matter more than the patch: voicings with sevenths and ninths and a relaxed swing and groove do half of the lofi feel before any processing.
FOG KEYS moves filter, detune, space and movement together from one FOG knob, across five sound layers, and the mod wheel can play it in and out.
Combine a soft attack, a slight detune or pitch drift, a low pass filter and a dark, long space. On a synth you can put the filter on the mod wheel and play the haze in and out with the chords.
No. Two oscillators with a soft felt or noise transient on top make a convincing keys sound, and a synth lets you control each part of the lofi character separately.
Extended chords with sevenths and ninths, voiced closely and played with a relaxed timing, carry most of the lofi feel before any processing.
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