Piano-action photo: Caique Araujo / Pexels. The photo shows the mechanism, not a specific felt preparation.
A felt piano is usually an acoustic piano played with an additional layer of felt between its hammers and strings. That layer softens the beginning of the note and changes its tone; a digital instrument can reproduce the effect through samples or modelling. The close, rustling sound familiar from many recordings also depends on the performance, the microphones and the production.
There is a small puzzle here: an ordinary piano already has felt on its hammers. Understanding what the extra layer does helps explain both the appeal of this sound and why a quiet-practice pedal alone may not reproduce a favourite record.
How the extra felt changes a piano note
Press a key and the action sends a felt-covered hammer towards the strings. The brief contact sets them vibrating. With an extra strip in the way, the hammer strikes through another cushioning layer. The instrument still produces pitched notes, but their attack, the first instant of sound, takes on a different character.
A piano note contains a fundamental pitch and higher-frequency components called partials. Their relative strengths help distinguish a rounded tone from a bright one. Research by Anders Askenfelt and Erik Jansson at KTH explains that the duration of hammer-string contact affects those upper partials: shorter contact can excite more high-frequency content. This gives useful background for why changing the contact material changes tone, although their measurements are not a test of every kind of felt preparation.
There is no single specification for a felt piano. The material, its thickness and positioning, the piano underneath it and the way the player strikes the keys all matter. “Felt” therefore describes an approach to making the sound, not a fixed equalizer setting or a guaranteed amount of volume reduction.
On an upright with a practice muffler, a pedal or lever lowers the additional strip into the hammer’s path. This simplified side view shows the difference before the hammer reaches the string.
It also helps to separate a muffler from the piano’s dampers. Dampers stop strings ringing when a note is released; a muffler changes the strike. The right sustain pedal lifts dampers so notes can continue after the fingers let go. Adding felt is not a replacement for controlling that pedal.
Felt piano, soft pedal and quiet playing are different choices
Playing gently changes the hammer’s impact. A grand piano’s left soft pedal shifts the action sideways; an upright’s left pedal generally brings the hammers closer to the strings. Neither mechanism is the same as inserting an additional strip. Yamaha’s explanation of grand and upright pedals shows these distinctions.
The middle pedal may operate a muffler, but it can have other functions. Check the instrument’s manual, or use our guide to identifying a piano’s middle pedal. A softly played piano, a piano with the soft pedal down and a felt-muted piano can all be quiet while producing different attacks and colours.
Likewise, reducing a recording’s volume makes the existing sound quieter. Cutting treble with EQ changes the balance of frequencies after the note has been made. Either can be useful, but neither tells you that a felt layer was involved in the original performance. A track described as “soft,” “cinematic” or “intimate” might use a completely ordinary piano.
If your acoustic piano has a built-in muffler, use it as its maker intends. For a different preparation, ask a qualified piano technician: do not push loose fabric into the action or try to copy a studio setup from a photograph. The piano remains audible with a muffler engaged. Headphone practice requires a suitable digital instrument or a separate silent system.
Nils Frahm’s Felt: when the surrounding sounds become part of the music
For a concrete recording story, start with Nils Frahm’s 2011 album Felt. In his account of making the album, Frahm describes dampening the piano for late-night playing so he would not disturb his neighbours. He then placed microphones deep inside the instrument, almost touching the strings. His description includes breathing, the piano’s action and creaking floorboards becoming conspicuous parts of the recording.
That account brings two separate decisions together: changing the instrument’s sound and choosing a listening position very close to it. It does not establish that every noise comes from the felt, or that all intimate piano recordings use the same method.
Start with “Keep,” shared below by Frahm’s label, Erased Tapes. On successive passes, follow a different aspect of the recording using the prompts beneath it.
Follow the start of each note. Attend to the moment the pitched sound appears, before you follow its decay. Which notes have a clearly defined edge?
Follow the sounds around the notes. Notice events associated with a strike, a release or a gap in the phrase. Can you separate a pitched tone from a short mechanical sound without needing to identify every noise?
Follow what remains in the gaps. Listen for overlapping notes and the space around them. A long tail alone cannot tell you how much comes from strings, the room or added effects.
These are listening questions, rather than a claim that one sonic detail proves how a recording was made. For an unfamiliar track, the artist’s or engineer’s production account is better evidence of felt use than the title, cover art or mood.
Why felt recordings can sound close, noisy and spacious at once
A microphone records from a particular position. It does not hear the piano as an abstract instrument. Close placement changes the balance of direct sound and room sound, and the balance between different parts of a large instrument. DPA’s piano microphone guide explains the different perspectives available around the hammers, strings and room.
This helps explain an apparent contradiction: a piano can seem close enough to touch while a spacious tail hangs behind it. A close recording can have reverb added later. Conversely, a very dry sound can still include plenty of pedal or action noise. Distance, noise and reverberation are separate decisions.
If you are recording an upright with its own muffler, make a short take from a stable microphone position outside the moving mechanism, then try another position. Keep the passage and playing level similar. Compare the balance of notes, mechanical sounds and room, rather than automatically choosing whichever take is loudest. Secure equipment so it cannot fall into the instrument.
For a simple practice recording, clarity may matter more than atmosphere. You need to hear whether the melody projects and whether the pedal clears. A phone placed very close to the keys may emphasise movements you barely notice while playing. Our post on recording your piano practice covers getting a useful take before adding production equipment.
What “felt” means in a piano plugin
In a sampled instrument, playing a note triggers recordings of a piano, with processing and other layers contributing to the result. A physically modelled instrument calculates the sound from a representation of the instrument’s behaviour. Both approaches can offer a felt sound. The controls available afterwards depend on how that particular instrument was built.
Three examples show the distinction. These are descriptions of the makers’ recording methods and controls, not a hands-on ranking of their sound.
Spitfire Originals Felt Piano: change the microphone blend
Spitfire’s Felt Piano was recorded on an upright at Spitfire Studios, played by Gwilym Simcock, with soft felt between hammers and strings. The maker describes a dry recording and three signals: Condenser, Ribbon and Hammers. The last adds recorded hammer detail; changing its level changes the blend of material already captured.
That is a useful distinction when a preset feels too busy. A microphone or hammer blend can alter the perspective without changing your notes. The product page includes demos and a walkthrough; its current release runs in Splice INSTRUMENT, so follow the current installation instructions if you already own it.
Noire: change the recorded instrument, then the noises
Native Instruments explains that Noire Pure and Noire Felt use separate sample libraries of the same grand piano. The felt preparation was present during recording. Selecting Felt is therefore a change of source recordings, rather than simply darkening Pure with EQ.
Its manual (PDF, “Noises Area,” printed page 7) also distinguishes Pedal, Mechanical and Felt noise controls. In this interface, the Felt noise control adjusts the sound of hammers hitting the strip. Turning that noise down does not turn the underlying Felt instrument into the separately recorded Pure instrument. This is why reading a control’s description matters more than assuming its name tells the whole story.
Pianoteq: change a parameter in the model
Modartt describes Pianoteq’s Celeste pedal as reproducing a felt-muted piano, with adjustable felt thickness. Here the change belongs to a physical model. It is a different operation from mixing microphones in a sample library.
If you are choosing software, our Pianoteq and Noire comparison covers the setup and buying questions. For understanding the sound, the useful question is simpler: does the control change the source piano, a noise layer or an effect applied afterwards?
Try a four-bar experiment with sound, spacing and pedal
The following original pattern gives you something consistent to compare. You need a piano or keyboard and enough familiarity to find the named notes. Any piano sound works for the arrangement experiment; comparing ordinary and felt sounds requires a built-in muffler or sounds you already have. No particular software, paid download or recording equipment is required.
Play in 4/4 at a comfortable slow pace, around 60 beats per minute. Play one right-hand note on each beat. Hold the left-hand bass for all four beats of its bar. Middle C is C4 here, and C3 is the C an octave below it. Keyboard software sometimes uses different octave labels.
Start without the sustain pedal. The harmony is Cmaj7, A minor, Fmaj7 and G major. This is a practice pattern written for this post, not a transcription of Frahm’s music.
| Bar / harmony | Left hand: hold | Right hand: beats 1, 2, 3, 4 |
|---|---|---|
| 1 · Cmaj7 | C3 | E4 · G4 · B4 · G4 |
| 2 · A minor | A2 | E4 · A4 · C5 · A4 |
| 3 · Fmaj7 | F2 | E4 · A4 · C5 · A4 |
| 4 · G major | G2 | D4 · G4 · B4 · G4 |
On a narrow screen, swipe or scroll the table sideways to see all the notes.
Notice that bars 2 and 3 keep the same right-hand notes while the bass changes. That makes the bass line part of the experiment: can you hear the harmony move even when the upper pattern stays still?
First pass: compare the attack
Play the pattern using an ordinary piano sound, then the felt option if you have one. Keep added reverb low and the listening level similar. On software, replaying one MIDI performance makes the comparison more consistent; at an acoustic piano, aim for a similar touch. Follow the beginning of each note and whether the top notes remain clear. This is a comparison to make yourself, not a promise that every felt instrument will respond alike.
Second pass: hear where one harmony ends
Add sustain pedal, changing it with each new bar: release the old pedal as you play the new bass, then depress it again. Compare that with the first pass. Pay particular attention to the move from C3 to A2. If the old bass is still dominating the new bar, try a clearer pedal change before reaching for an EQ control.
Now add a little reverb, if your instrument provides it, and repeat. Releasing the sustain pedal can damp the piano notes while an added reverb tail continues. Learning to hear those two endings separately makes it easier to decide which control needs changing.
Third pass: leave room for the sound
In each bar, omit the right-hand note on beat 4 and leave that beat empty. Keep the bass held. Does the space make the line easier to follow, or does it interrupt the phrase? Then try the original rhythm with the bass one octave higher. The pitch classes and harmony stay the same, but the register changes.
These are arrangement decisions you can make before buying another sound. A quiet patch does not require a slow piece, and a soft attack does not require constant pedal. The useful setting is the one that lets the rhythm, bass movement and melody do their jobs.
When a felt sound helps, and when to change course
We would start with felt when the piano’s attack should sit gently inside an arrangement, or when the mechanical detail is part of the musical character you want. It is also worth trying for a sparse part in which a few notes have time to decay. The decision still belongs to the piece: a restrained accompaniment under a voice has a different job from a foreground solo.
In a busy mix, check the part with the other instruments playing. If a melody disappears, making the whole piano louder may bring up unwanted bass and noise along with it. Try a clearer source sound, a higher register or a less crowded accompaniment. If the notes remain audible but the rhythm feels indistinct, reduce the reverb or shorten the overlapping notes before adding more processing.
For acoustic practice, spend some time with the muffler disengaged as well. You need to hear how your touch and balance work with the piano’s ordinary attack. For a finished recording, choose how much of the mechanism you want the listener to notice. An audible pedal movement may support the phrasing in one passage and distract from it in another.
Keep the four bars unchanged while you make those choices. When you can hear the bass move, follow the upper line and recognise where a phrase ends, you have a useful basis for choosing the sound, whether that means extra felt, a different preset or simply less pedal.
