LISTENING / A CLOSER LOOK
Ever wondered what someone means by “natural timbre” or “a deeper soundstage”? Here is a guide to those listening impressions, with a little science and plenty of music along the way.
Some words describe how sound behaves; others describe how it feels to us. Both have a place when we talk about music. Explore a familiar term or discover a new way to describe what you hear.
You can recognize a familiar voice before you catch a single word. That recognizable character is timbre.
The balance of frequency components, and the way they change over time, give each sound its identity. When we call timbre “natural,” we mean that the voice or instrument sounds convincing to us.
In the music A piano and a clarinet can play the same note at the same loudness and still sound unmistakably different.
Some recordings feel warm and full; others feel lean, bright or forward. These words describe their tonal balance.
Warmth usually suggests body in the lower midrange; presence suggests a voice or instrument stepping forward. The terms do not have fixed frequency boundaries. EQ lets you adjust the balance of bass, midrange and treble.
In the music The same singer can sound fuller or more intimate without singing a different melody.
The breath in a voice or the gentle rasp of a bow gives a sound something you can almost feel.
Harmonics, noise components and changes in the sound envelope contribute to texture. In musical composition, texture can instead describe how several musical parts are arranged.
In the music Under a singer’s sustained note, you may hear a soft layer of breath.
Good bass is about more than weight. There is a melody down there, too.
Pitch depends on the sound’s periodicity and harmonic structure. “Bass definition” describes how easily those individual notes come through, rather than how much bass there is.
In the music A plucked bass line becomes a sequence of distinct notes, each with its own shape.
The first instant of a note tells you a surprising amount about what is playing.
That beginning is the attack. Its changing level and frequency content help us recognize the instrument. A transient is a brief, rapidly changing part of a sound; sharper is not always more faithful.
In the music A struck piano note begins very differently from a softly bowed string.
A piano chord does not simply stop. It hangs in the air, softens and gradually slips away.
The strings keep vibrating and transfer energy to the soundboard. Dampers shorten that vibration; the sustain pedal lifts them and lets other strings resonate too. The room may continue reverberating after the piano itself has faded.
In the music That lingering tail is what we mean by the fading resonance, or decay, of a piano note.
Resonance is part of what gives an instrument its voice, and a room its character.
Strings, instrument bodies and rooms respond more strongly around certain natural frequencies, storing and releasing vibrational energy. This can enrich a sound, or make an unwanted room note linger.
In the music A piano’s body helps its strings sing; a room can also make one bass note stand out more than its neighbors.
Music breathes through changes in loudness, from a gentle phrase to a sudden flourish.
Dynamics describe those level changes. Expression also takes in timing, articulation and phrasing. “Microdynamics” is a handy, informal name for the smaller changes within a phrase.
In the music A singer can give a held note expression with a small swell and a gentle retreat.
Even with the whole band playing, you can sometimes follow one quiet instrument with ease.
Our ears use differences in tone, timing and position to distinguish the parts. Masking works against this: a stronger sound can hide a weaker one. Separation describes hearing those parts clearly within the mix.
In the music The quiet guitar remains a musical thread you can follow through the chorus.
Close your eyes and the performers may seem to occupy places across the space in front of you.
Stereo signals create apparent sources between speakers. Reflections and speaker directivity affect their definition, width and depth, so your listening room helps shape the scene too.
In the music A singer may seem to stand steadily in the center, with instruments arranged to either side.
Some recordings seem to stretch behind the speakers, with one performer nearer and another farther away.
The relationship between direct and reflected sound helps create that impression. It may come from a real venue or a scene built in the mix. We hear a sense of distance, not a measured number of feet.
In the music The soloist feels close, while the orchestra extends behind them.
Sometimes the space around the music is almost as memorable as the notes.
Repeated reflections form reverberation. The way they fade and their tonal balance help suggest a room. RT60 measures a 60 dB fall in reverberant level, often estimated from a shorter measured decay.
In the music After a phrase ends, a little of the room seems to remain, whether captured at the session or added in the mix.
When a presentation feels cohesive, the parts belong together and it is easy to settle into the music.
Balance, spatial presentation and personal preference all contribute. A comfortable sound is a listening experience, rather than a single acoustic measurement everyone will agree on.
In the music The performers feel like an ensemble, rather than separate sounds competing for your attention.
A recording with instruments pulled hard to either ear can feel quite different on headphones than on speakers.
Speakers send some sound from each channel to both ears. Crossfeed recreates part of that overlap by mixing a controlled amount across the headphone channels, often with filtering and delay. It softens the divide without recreating every cue of a room.
In the music An older stereo recording may feel less split between your left and right ears.
The small things count: a quiet accompaniment, a breath, or the last trace of a fading note.
A stronger sound can mask a weaker one, depending on their frequency, level and timing. “Transparent” describes the impression of hearing through to those details; it is not a claim of zero error.
In the music A soft musical part stays easy to follow beneath the main melody.
When the music grows quiet, you may become aware of the sound underneath it.
That background is the noise floor. Musical dynamic range describes the contrast between quiet and loud passages; equipment dynamic range describes a system’s capacity. A noise measurement also needs a stated reference and bandwidth to be meaningful.
In the music A little hiss that went unnoticed during the chorus can become apparent in a quiet passage.
Digital audio represents values with a finite set of levels. Quantization is the step that chooses between them.
The resulting error can follow the music rather than behave like random hiss. Appropriate dither adds a little noise to reduce that connection, trading correlated distortion for a controlled noise contribution.
In the music A smoothly fading note offers a useful way to explore what happens near the quiet end of a digital signal.
Every calculation has room for only so many digits. Numerical precision tells us how many significant digits it can keep.
Keeping more digits reduces rounding error during processing. This is separate from the output bit depth, your DAC’s analog noise and what you can hear.
In the music PGGB’s precision settings concern the calculations that prepare the music for your DAC.
A favorite recording is a lovely place to start. You may find a word for something you have always enjoyed, or notice a detail you had not put into words before. When comparing, the same passage at a consistent playback level makes differences easier to judge.