Acoustic Guitar Tone Profiler
Translate monopole physics into guitar tone and playing style.
Acoustic Guitar Tone Profiler
Map your monopole parameters to specific tone profiles and optimal playing styles.
Monopole Parameters
Suited Playing Styles
Calculated Monopole Tone Profile
Acoustic Guitar Tone Profiler - why this tool exists?
Most acoustic guitars are described through parts: woods, bracing patterns, body shapes.
But musicians do not experience parts — they experience behavior.
They feel:
responsiveness
headroom
sustain and decay
clarity and balance
The Acoustic Guitar Tone Profiler represents the acoustic design space of the guitar’s main monopole. It translates the physical parameters of the soundboard monopole into behavioral tendencies.
This makes it easier for builders, musicians, and dealers to talk about guitars using a shared descriptive language, grounded in acoustics rather than mythology.
Define Your Acoustic Target
The sound of an acoustic guitar is largely defined by the energy distribution across its main resonance modes. This profiler focuses on the soundboard monopole T(1,1)2, the most powerful resonance, as it defines the center of tonal balance and the acoustic potential of the instrument.
By entering your target values for:
Equivalent Mass
Equivalent Stiffness
the app calculates the soundboard monopole Resonance Frequency and the resulting Monopole Mobility.
Your guitar’s acoustic signature is then plotted in a 2D space alongside nine distinct playing style zones, giving you an immediate visual assessment of your design’s proximity to target performance goals such as fingerpicking, folk, or strumming.
These zones do not represent better or worse guitars — they represent different balances of responsiveness, headroom, sustain, and control suited to different musical contexts.
This allows builders to move from intuitive adjustments toward intentional acoustic design, where structural choices can be connected directly to the desired musical behavior of the instrument.
Technical References: Monopole Physics
The profiler operates based on these core acoustic principles:
Input Parameters: These parameters define the fundamental mass-spring system of the soundboard when uncoupled from other body resonances. The Equivalent Mass is calculated using the simple harmonic motion formula: M = K / ( (2 * Pi * F0) ^ 2 )
Monopole Mobility: This value is the inverse of the mechanical impedance and is inversely linked to the rigidity and mass of the soundboard. It indicates how responsive the instrument is and determines its acoustic efficiency and dynamic character.
High mobility results in High Sensitivity, quicker decay (less sustain), and suitability for intricate fingerpicking or controlled studio work. This profile has a higher predisposition to generating wolf notes.
Low mobility results in high headroom, low feedback on stage and a smooth sound suited for strumming or live music.
Back Activity: this slider acts as a damping modifier. An Active Back absorbs energy from the top, which effectively reduces the monopole’s peak mobility, thereby mitigating the wolf note predisposition and bringing a mellow, fuller character to the sound. A Passive Back maintains maximum dynamic range but increases the likelihood of wolf tones.
Model Origins and Acknowledgements
The development of the Tone Profiler has been largely inspired by the seminal work of Trevor Gore, presented in his classic book Contemporary Acoustic Guitar Design and Build, now in its third edition. Special thanks also go to Martino Quintavalla, who contributed to refining this model through valuable private discussions and published works.
Acoustic Playing Styles: A Quick Reference
- Live Playing / Stage
More than a style, this is a specific situation, where the players uses the preamplified output of the guitar. In this application, the most valuable qualities are a solid and reliable sound on the mixing consolle, and as low as powwible feedback from the monitora onstage. To get this results, the monopole mobility will be very low (a stiff and high mass soundboard), and this will also help to keep a stable setup while travelling through the dates of your tour.
- Flatpicking / Bluegrass
This style is driven by the pick, used to articulate fast, single-note melody lines, often adapted from fiddle tunes. It is characterized by high speed, powerful rhythmic drive, and note separation to cut through a string band. Bluegrass players demand guitars with immense projection, a quick attack, and outstanding clarity and definition in the midrange to keep the melody from getting lost. Bluegrass is focused on great projection, separation of notes, attack on the midrange. Stiff soundboard, light mass, passive back. Flatpicking can profit of a bit more sustain and body on the low-midrange. adding a bit more mass will increase the sustain and allow to get a slightly mellower sound, while keeping the clarity, focus and precision.
- Strumming
The backbone of countless songs, Strumming uses a pick or fingers to sweep across the strings for a full, harmonically rich chordal sound. This style requires a guitar with great headroom—the ability to be played loudly without collapsing into distortion (dynamic compression). The sound needs to be balanced and harmonically blended to support vocals or other instruments, providing a warm, powerful wash of sound. Stiff soundboard, high equivalent mass, passive back.
- Folk
Rooted in traditional melodies and storytelling, Folk guitar often features simple open chords, capos, and a variety of easy fingerpicking or moderate strumming patterns. The acoustic requirement is for a tone that is balanced, warm, and highly supportive of the human voice. Projection is less critical than a controlled, non-overpowering tone that provides an intimate, clear backdrop for lyrics. A balanced mix of parameters is required, with a great freedom for the builder.
- Recording (Studio)
As for the Stage application, this is not a playing technique, but a primary use case. Guitars optimized for recording must be acoustically controlled to perform perfectly in front of a microphone. They need a low noise floor, minimal distracting overtones (medium back activity), excellent tonal purity, and a balanced output across the frequency spectrum. Projection is secondary to an even, clean, and responsive sound profile. In between the folk profile and the fingerpicking.
- Jazz
In an acoustic context, Jazz playing involves complex chord voicings and single-note improvisations. The tone must be warm, articulate, and “woody,” with a clear fundamental note and often shorter sustain than other styles to prevent chords from becoming muddy. Players need high dynamic control for precise rhythmic “comping” (chord accompaniment). Medium low values of mass and stiffness are excellent for this target, with an intermiadte activity level of the back.
- Fingerstyle, Drop Tuning
This broad style uses the individual fingers (with or without fingerpicks) to pluck multiple strings simultaneously, creating complex, self-contained arrangements of bass lines, chords, and melodies. Fingerstyle musicians prioritize nuance and articulation. They need a guitar with exceptional string separation so that each note rings clearly, and a high degree of responsiveness at lower volumes to capture subtle dynamic changes. Low mass and stiffness are often required, coupled with high level of activity of back.
Mastering the sound of the acoustic guitar, the manual.
This Tone Profiler map represents the acoustic design space of the guitar’s main monopole.
This book introduces the acoustic framework behind tools like the Tone Profiler. It explains how the main resonance modes of the guitar interact, and how builders can measure, predict, and intentionally shape the sound signature of their instruments.
You will learn:
how to measure the main resonances of a guitar
how to design the acoustic response of an instrument
how to control mobility, headroom, and dynamic character
how to identify and solve resonance issues such as wolf notes
