12 hole, 48 note, digital chromatic harmonica.
Expressive control over any electronic instrument.


Introducing the Lekholm DM48 Digital Chromatic Harmonica.
Twelve independent pressure sensors puts harmonica players in control of a world of electronic sounds - silently at night or loud on stage without feedback. DM48 is a pure controller instrument without onboard synthesis.


12 precision pressure sensors · USB MIDI · Instant key changes · Stores multiple settings & tunings · Built-in tuning editor ·  Export & import tunings · Flexible response parameters · Single or multichannel output · Compact size · OLED display · Anodized aluminum mouthpiece · Adjustable breathing resistance


Performance demo

Cole Porter's "You'd be so nice to come home to" played on the DM48 paired with a Yamaha VL70-m.

Performance demo

Laurent Maur + YOUPI quartet plays the DM48 live in Paris using Acoustic Electro Waves in Reason.

Technical demo

DM48 together with the excellent SWAM Flutes virtual instrument. Showcases a range of possibilities including start/stop of backing tracks using the buttons, easy improvisation with custom tunings and more.

Performance demo

Adam Glasser plays his song "Tourmalet" on the DM48 together with a Yamaha VL70-m.

Performance demo

Jason Keene playing Benny Goodman's "A smooth one" on the DM48 using Sample Modeling's "The Sax Brothers".

Performance demo

Laurent Maur improvising using Sample Modeling's "The Flutes".

Performance demo

Jason Keene playing "Bye bye blackbird" on the DM48 and Sample Modeling's "The Trumpet 3".

Performance demo

Jason Keene doing a beautiful rendition of "Have you met Mr Jones?" using a flute patch in Logic.

Performance demo

John Shirley does looping/layering of bass, organ, and sax sounds, with a live drummer.

Performance demo

"Hornelectric" triggers some heavy electronic sounds (NI Massive) using the DM48.

Performance demo

Laurent Maur playing "Isfahan" on the DM48 together with Sample Modeling's "The Trumpet 3".

Technical demo

Harmonica virtuoso Brendan Power playing and demonstrating various features. Prototype instrument.

Technical demo

Laurent Maur demonstrating some more exotic applications, including unusual tunings and single-hole triggered chords with the help of Reason refills by EWI Reason Sounds.

Technical demo

Brendan Power showing his pitch bender and blues mouthpiece accessories. Prototype instrument.

Technical demo

DM48 together with iOS-based synthesizers (GarageBand and DXi) using the Apple Lightning to USB Camera Adapter. The demo includes positive and negative bending, custom slider intervals and easy key changes. Prototype instrument.

Technical demo

Demo of tuning editor and tuning-related features, including Richter tuning. Also shows DM48 together with the Chris Hein sampled chromatic harmonica plugin, as well as playing with an external arpeggiator. Prototype instrument.

More videos are available on our YouTube channel.


Blows and draws
The pressure sensors can sense both positive and negative pressure, enabling both blows and draws.

Only one parameter is measured - air pressure. Traditional bending is therefore not possible. A pressure-controlled bending feature has been implemented on the DM48 - bends are achieved by strong blows/draws. Bending threshold and sensitivity are adjustable.

Compared to an acoustic harmonica, the DM48 is less expressive in many ways, as mouth geometry, hands, and classical bending/overblows cannot be used to modulate the sound. MIDI expression messages are however transmitted, such that sound intensity can be modulated after triggering a note. This can be heard in the demo videos.

Rather than mechanically redirecting the airflow, the slider is electronic. It has a shorter stroke length and thus a different feel compared to a regular chromatic. This may take some time getting used to, but has the advantage of being faster.

The DM48 is a MIDI controller without sound synthesis. Similar to a MIDI controller keyboard, a synthesizer (software or hardware) is needed to generate sounds. The DM48 can be connected directly to a computer via a USB. An Apple Lightning to USB Camera Adapter allows connection to an iPad/iPhone. A MIDI USB host adapter is needed to connect the DM48 to a standard 5-pin MIDI connector. A third-party mini pitch controller and diatonic-style mouthpiece is available from Brendan Power - note that we do not sell these independently developed accessories.

Suitable synths
Like other electronic wind instruments, the DM48 will not be exciting to play with regular keyboard-type patches. Good results can be achieved, for example, with physical modeling synths that emulate wind instruments, either software or hardware. The acclaimed Yamaha VL70-m sounds great and works really well with the DM48, but one should keep in mind that the VL70-m is a monophonic synth. While expensive, the SWAM virtual wind instruments from Audio Modeling are outstanding in terms of realism and a joy to play with the DM48. Wind instruments in GarageBand, in particular on MacOS, are a decent budget option. The Acoustic Electro Waves wind synthesizer plugin for Reason is great together with the DM48, and works on both Mac and Windows machines. Together with Reason in demo mode (song loading disabled, but otherwise full functionality at no cost) it is a bargain at $13.

Harmonica sounds
Decent realistic harmonica sounds can be achieved with physical modeling synths as well as sample-based software instruments. However, the DM48 cannot in any way replace or convincingly emulate an acoustic harmonica.

The firmware can be updated by the user via USB, and the latest version (v1.40, July 2018) can be downloaded here. It may be noted that dynamic velocity is currently not supported (a static but adjustable velocity value is transmitted with all "note on" MIDI messages). Controller (MIDI CC) messages for breath pressure are however sent continuously at high rate and resolution.

The DM48 packs a wide range of features and adjustable parameters, all detailed in the DM48 User Manual.

User forum
Please visit the DM48 Google Group.

Ordering & Contact

The DM48 started out as an enthusiast project, but is now manufactured in small series and is usually available for immediate delivery. The price within the EU is 7500 SEK (~750 EUR) including Swedish VAT plus shipping (~25 EUR). Non-EU customers avoid VAT and pay 6000 SEK (~720 USD) plus shipping (~30 USD), but local sales tax and import duties may be added depending on destination. Contact us on the email adress further down if you want to buy a DM48, and sign up to our mailing list if you want to receive updates about development and production:

Note that the DM48 is an advanced MIDI controller, and prior experience with synthesizers and MIDI is recommended. Some suggestions on downstream setups are given in the manual, but we cannot provide support for products beyond the DM48 itself. Potential buyers are advised to carefully read the information on this page and in the manual.

The instruments are assembled by hand in our small workshop. The casing is produced using high-quality SLS 3D printing, which gives it a slightly rough surface that is more difficult to clean compared to the injection molded plastics typically used for mass production. The DM48 is available only in black with a white bottom chassis (earlier units where white). The mouthpiece is manufactured in aluminum by precision CNC machining, and has a smooth semi-matte anodized surface.

Current black model.

Original white finish - otherwise identical.