What Do Pedals Really Do?

The Footnotes of Piano Playing: What Pedals Really Do

Piano pedals are often overlooked by beginners, but they play a crucial role in shaping a pianist’s sound. Let’s break down what each of the three standard pedals does—and how their functions differ between grand and upright pianos.


The Right Pedal: Sustain Magic

This is the pedal you probably already know—and love.

Step on it, and all the dampers lift off the strings, letting them ring even after you lift your fingers. It creates that lush, flowing sound pianists live for.

Pro tip: Don't hold it down forever. Change chords? Change the pedal. Otherwise, everything turns to mush.


The Left Pedal: Soft Spoken

The soft pedal isn’t just about volume—it can color your tone, too.

On a grand piano, pressing this pedal nudges the keyboard slightly to the side. That makes the hammers hit fewer strings (usually two instead of three). Result? Softer, subtler, slightly different sound.

On an upright, the hammers just move closer to the strings, shortening the travel. It’s quieter, but the tone doesn’t shift much. Think of it more as a “volume dip” than a color change.


The Middle Pedal: Choose Your Adventure

This one’s tricky because it doesn’t always do the same thing.

On a grand, it’s a sostenuto pedal—it holds only the notes you’re pressing when you hit it. Handy for sustaining bass notes while your hands are busy elsewhere.

On most uprights, it’s not a sostenuto at all. Instead, it’s a practice pedal—drop a felt strip between hammers and strings, and voilà: super-quiet playing. Ideal for quiet-night sessions.


Pedals should support your technique—not hide your mistakes.

The sustain pedal connects and colors your phrases.

The soft pedal brings down the dynamics or creates a gentler mood.

The sostenuto (if you’ve got it) adds complexity and control.

The key is to listen. Use your ears. If it sounds too blurry, lift your foot.


Wrap-Up: Use Your Feet, Free Your Sound

Though operated by your feet, piano pedals are essential to expressive playing. They shape dynamics, tone, and atmosphere. Knowing how each pedal works—especially the differences between grands and uprights—lets you use them intentionally and musically.

Master them, and your piano will truly sing.

Jonathan Ho

“When I imagine what it’s like to own my very own piano, my whole mindset changes when I see another piano. My approach and attention to detail becomes more personal and precise when I’m working on them.”

— Jonathan

Piano Technician and Performer

Jonathan grew up in Malaysia and lived in Vancouver before immigrating to the United States with his family. He earned his Bachelor of Music from the University of Central Oklahoma where he was a performer and taught piano lessons. In 2019, he moved to Boston to enroll in the piano technology program at North Bennet Street School, the oldest trade school in North America and widely considered to be the premier school of piano technology. During his time in Boston, he excelled in the intensive training program gaining an in-depth understanding of piano technology and service. After graduation, he was employed by two of the best piano rebuilders in the country (Oregon and Nebraska). In Nebraska, he continued to develop his service work with other technicians in the field in addition to the shop, gaining field tuning, regulation, and repair experience in both disciplines. Jonathan relocated to Saint Louis in 2023 to join the Vanguard Piano Service team and make the area his home.

Continued Education

Jonathan is passionate about piano technology and is committed to the continuing development of his craft. He attends the annual National and Regional Piano Technician Conventions. He has accepted opportunities to learn from other skilled piano professionals by visiting other technicians’ shops and touring manufacturer facilities. Jonathan will continue to enhance his skills by attending team trainings and professional development opportunities with the Piano Technician’s Guild.

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