With a history that stretches back to ancient China to modern blues clubs, concert halls, and even outer space, the harmonica is a portable and versatile musical instrument.
The harmonica's roots are in the Chinese sheng, a free-reed instrument dating to around 1100 BC, which used bamboo pipes to produce tones through vibrating reeds.
In the late 18th century, European inventors began experimenting with free reeds. Christian Gottlieb Kratzenstein created a "talking machine" in 1780 using free reeds to mimic human speech.
The modern harmonica emerged in early 19th-century Germany, with Christian Friedrich Ludwig Buschmann often credited with inventing the first recognizably modern version in 1821. By the mid-1800s, Matthias Hohner had industrialized harmonica production, exporting millions of the instruments to the United States, where the harmonica became deeply embedded in folk and blues traditions.
Despite its small size, the harmonica is a marvel of design. It consists of the comb, which is the body of the instrument, traditionally made of wood, but now also plastic or metal, containing air channels; the reed plates, which are thin brass or steel reeds mounted over slots, which vibrate when air passes; and the cover plates, which are metal covers that shape the tone and provide grip. This sandwich-like construction offers durability, portability, and a broad tonal range.
There are several varieties of harmonicas, each suited to different genres. These include, but are not limited to, the diatonic (most common, with 10 holes tuned to a major scale), which is central to blues, folk, and rock; the chromatic (equipped with a button-activated slide, allowing access to all 12 notes of the chromatic scale), favored in jazz and classical; the tremolo (featuring two reeds per note, slightly detuned), creating a shimmering sound; the octave, which pairs reeds an octave apart for a fuller tone; and bass and chord harmonicas, which are larger instruments used in ensembles and orchestras.
The harmonica has been championed by legendary musicians across genres, such as Little Walter, who revolutionized blues harmonica with amplified techniques; Sonny Boy Williamson I & II, pioneers of Chicago blues; Stevie Wonder, who brought the chromatic harmonica into soul, pop, and jazz; Bob Dylan, who made the diatonic harmonica a symbol of folk protest songs; John Popper (Blues Traveler), known for virtuosic speed and improvisation; and Tootle Thielemans, who elevated the chromatic harmonica in jazz.
The harmonica is one of the best-selling instruments worldwide, rivaling the guitar. Its portability made it a favorite among soldiers in both World Wars, offering comfort and entertainment in the trenches. It was the first musical instrument played in space. In 1965, astronaut Wally Schirra played "Jingle Bells" on a harmonica aboard Gemini 6.
The harmonica's simple construction mocks its profound expressive range. Despite its small size, the harmonica can cover over three octaves on a single instrument. Yet it is small enough to fit in a pocket and powerful enough to shape the sound of entire genres.
Below, you will find several online informational or instructive resources for the harmonica. Retail sites offering the instruments for sale may be found in the Musical Instruments category in our Shopping & eCommerce section.
 
 
Recommended Resources
David Barrett's Blues Harmonica
Centered on David Barrett's extensive blues harmonica lessons, supplemented by paid downloads and community forums, with limited free previews and trial/coupon promotions, the website represents Barrett's online hub for learning blues harmonica, presenting a large library of lesson videos, structured lesson plans, downloadable audio, and PDF materials, along with community forum support and contact details. The support forum is read-only without registration or a login.
https://www.bluesharmonica.com/
Through the website, this resource offers direct-to-consumer online music education and e-commerce, combining instructional content (free lessons, courses, videos, and a forum community) with product sales and gear reviews via an integrated online store and affiliate recommendations. Besides its free beginner lessons, the site offers structured paid courses and premium lessons beyond the starter material, along with expanded video lessons and guided curricula.
https://www.harmonica.com/
Dave Gage, founder and author of "Harmonica Lessons," has made his living playing and teaching diatonic and chromatic harmonica for over 30 years. Online since 1999, the site offers three paid membership options —monthly, quarterly, and annual— compared side-by-side here. The 1-year membership plan offers a 30-minute, one-on-one Zoom call with Dave Gage, along with instant feedback and help. Also included is an online harmonica store offering harmonicas, books, and other resources.
https://www.harmonicalessons.com/
Harmonica Links is a curated directory and resource portal that aggregates harmonica-related websites, instruction, player profiles, manufacturers, vendors, publications, clubs, repair/modification resources, and multimedia content. The site lists and links ot harmonica vendors and a harmonica store that offers harmonicas, books, CDs, microphones, and amps, and also provides or refers to external paid instruction services. A form is available for webmasters to submit their links.
http://www.harmonicalinks.com/
Operating as HarmonicaSong, this appears to be a solo instructor or small music education brand offering direct-to-learner harmonica instruction through freemium content and paid upgrades. Its revenue likely comes from a mix of paid lesson packages or courses, digital sales, optional memberships, Patreon, and advertising or affiliate links. Core instructional pages, sample lessons, and some tabs or backing tracks are available for free to attract paid memberships.
https://harmonicasong.com/
This is a membership-based charity that supports the harmonica community in the United Kingdom and internationally. Describing itself as "The Home of the Harmonica," the website serves players, teachers, therapists, collectors, repairers, manufacturers, and retailers since 1935. Its website offers membership sign-up and renewal, news, editorial content, an events calendar, outreach and community pages, and exclusive member resources and benefits. Membership benefits are outlined.
https://www.harmonica.uk/
Hohner Musikinstrumente GmbH & Co. KG is a German manufacturer of musical instruments. Best known for its mass production of harmonicas and worldwide distribution of the instrument, resulting in its dramatic popularization, particularly in the United States, the company has also manufactured kazoos, accordions, recorder flutes, melodicas, banjos, guitars, basses, mandolins, and ukuleles, although it is known mainly for its harmonicas. This is the company's official website.
https://hohner.de/en/
Offering subscription-based access to structured harmonica lessons, along with free resources to attract users to a paid school or membership tier for full course access and personalized feedback. Included are a collection of free beginner lessons, technique guides, gear reviews, and free tablature; over 1,500 lessons from beginner through advanced topics; and 24/7 access to specialist lessons, step-by-step courses, exclusive tabs, practice exercises, and other resources in its paid options.
https://www.learntheharmonica.com/
Run by Adam Gussow, Modern Blues Harmonica is a one-person instructional site offering instructional videos, downloadable harmonica tabs, lesson plans, a forum, equipment recommendations, biographical materials, interviews, historical content, and links to recordings and books. Direct sales of downloadable lesson plans and PDF tabs are offered, including bundled (complete) package sales, and ancillary sales and link referrals. Digital goods are delivered as downloadable files.
https://www.modernbluesharmonica.com/
Also operating as LearnTheHarmonica, the Tomlin Harmonica School is an online harmonica teaching site offering structured lessons, tabs, courses, and community features provided by harmonica players like Adam Gussow, Ronnie Shellist, David Barrett, Will Wilde, Liam Ward, Roly Platt, and others. The primary business model is its subscription-based online school, with secondary revenue from an online store, optional donations, and a free-to-play funnel, including a free trial.
https://www.tomlinharmonicalessons.com/


