Klangio GmbH
About us
klang.io builds the Artificial Auditory Intelligence that turns sound into notation.
Play or upload a recording and klang.io returns accurate sheet music, guitar tabs, MIDI and MusicXML in seconds. Our instrument-specific AI models cover every major family: piano and keys, guitars and bass, voice, drums, strings, woodwinds and brass. Full band mixes are transcribed directly, without stem separation. Over 10 million transcriptions have run through our engine since 2018.
Klangio Transcription Studio — on the web and in your pocket. Our flagship workspace, now on web, iOS and Android. Six transcription modes (Single-Instrument, Multi-Instrument, Rock, Ensemble & Orchestral, Arrangement and Lead Sheet) cover everything from a single guitar riff to a full band recording. Edit in notation or in the piano-roll view, then export to PDF, MIDI, MusicXML or Guitar Pro. Free to start, no account required.
Klangio API — our engine inside your product. Learning apps, notation software, DAWs, games, instrument makers and rights organisations build on our API today. Transcription, source separation, beat tracking, chord and strum recognition, with a model per instrument. Self-serve plans from a free tier upward, volume contracts, and on-device licensing where inference has to run locally.
Licences for music schools. Subscription-free campus licences covering all a school's teachers and their students, invoiced per school year with no auto-renewal, plus prepaid transcription quotas for a low-commitment start. Around 250 music schools worldwide already work with our tools.
Made in Germany. Founded in Karlsruhe in 2018 by Sebastian Murgul and Alexander Lüngen, independent and self-funded, with an in-house research team. Data handling follows German and EU law (GDPR).
At Music China we are looking for joint-venture and distribution partners in China, app and hardware makers who want transcription inside their product, and music-education groups. Find us in the German Pavilion, and bring a track: we will transcribe it live at the booth.
Address
Alter Schlachthof 33
76131 Karlsruhe
Germany
E-mail: sebastian.murgul@klang.io
Phone: +49 721 27660421
Internet: klang.io
Contact person:
Products & Services
klang.io — AI music transcription, from Germany
One engine, instrument-specific AI models, three ways to use it: our own apps, a developer API, and licences for music schools. Every result is editable and exports to PDF, MIDI, MusicXML and Guitar Pro.
Klangio Transcription Studio — web, iOS and Android
Our flagship. Upload audio, import a link, or record live, and get editable notation back in seconds. Six transcription modes:
Single-Instrument — one instrument, maximum accuracy.
Multi-Instrument — full songs and band recordings, transcribed straight from the mix.
Rock — multiple simultaneous guitars with playing techniques: hammer-ons, slides, bends.
Ensemble & Orchestral — small to medium-sized classical ensembles.
Arrangement — turn any track into a playable piano, guitar or saxophone arrangement.
Lead Sheet — melody and chords, the way a working musician reads a song.
Edit in standard notation or in the piano-roll view, adjust tempo, key and instrumentation, and export to your notation software or DAW. The mobile app brings the same engine to iOS and Android, so an idea can be captured and notated wherever it happens; projects sync with the desktop version. A DAW plugin is included with the subscription for Logic Pro, Cubase, Ableton Live and Studio One, with export to Dorico, Sibelius, Finale and MuseScore.
Free to start, no account required. Studio Pro and Ultimate plans available; 14-day money-back guarantee.
Klangio API — for developers and platforms
The same engine as a REST API. Learning apps, notation software, DAWs, games, instrument makers and rights organisations already build on it.
Transcription to MIDI, MusicXML, PDF and Guitar Pro, with a dedicated model per instrument
Source separation, beat tracking, chord recognition and strum recognition
Self-serve plans from a free test tier through Startup, Business and Enterprise, plus bespoke volume contracts
On-device licensing for hardware partners who need inference to run locally, priced on active devices rather than per call
Licences for music schools and academies
Subscription-free, invoiced, no auto-renewal.
Campus annual licence — unlimited fair-use for all of a school's teachers and their students, tiered by teacher count, managed through one central admin login. Students are included at no extra seat cost.
Prepaid quota — a fixed transcription credit that never expires, for schools that want to start small.
Free test access for teachers on request.
Also from klang.io
Focused single-instrument apps for those who want one job done: Piano2Notes, Guitar2Tabs, Sing2Notes, Drum2Notes, Violin2Notes and Wind2Notes. All of their functionality is included in Transcription Studio.
Why klang.io
Fast — notation in seconds, from an upload, a link, or a live recording.
Accurate — instrument-specific models resolve melody, chords, rhythm and harmony in full polyphonic mixes.
Everywhere — web, iOS, Android, inside your DAW, or inside your own product via API.
Open formats — PDF, MIDI, MusicXML, Guitar Pro. Works with the tools you already use.
Independent and German-built — in-house research team in Karlsruhe, GDPR-compliant, self-funded since 2018.
Klangio Transcription Studio
Turn any recording into sheet music, guitar tabs, MIDI or MusicXML. Transcription Studio listens to a full mix and works out what each instrument plays: piano and keys, guitars and bass, voice, drums, strings, woodwinds and brass. Six modes cover everything from a single instrument to a full band recording, a classical ensemble, a lead sheet, or a playable arrangement for piano, guitar or saxophone. Edit the result in standard notation or in the piano-roll view, then export to your notation software or DAW. Free to start, no account required.
Klangio Transcription Studio — Mobile App
Musical ideas do not wait until you are back at your desk. Record or upload on your phone and get sheet music, tabs and MIDI back in seconds, with the same six transcription modes as the desktop version. Edit in notation or in the piano-roll view, export to PDF, MIDI, MusicXML or Guitar Pro, and pick the project back up on the web. Free to start, no account required. Available for iOS and Android.
Klangio API — Music Transcription for Developers
Put klang.io's transcription engine inside your own product. One REST API gives you audio to MIDI, audio to sheet music, source separation, beat tracking, chord recognition and strum recognition, with a dedicated AI model per instrument. Learning apps, notation software, DAWs, games, instrument makers and rights organisations build on it today. Upload a file, choose the model and the output format, receive MIDI, MusicXML, PDF or Guitar Pro. Free test tier, self-serve plans, volume contracts, and on-device licensing for hardware partners who need local inference. Talk to us at the German Pavilion about integrations, OEM licensing and distribution in China.
Klangio for Music Schools
Give every teacher and every student at your school a tool that turns any recording into readable notation. Teachers prepare arrangements in minutes instead of evenings; students get sheet music for the songs they actually want to play, at the level they can play them. The Campus annual licence covers all of a school's teachers and their students, invoiced once per school year with no auto-renewal and no per-seat cost for students, managed through one central admin login. A prepaid quota that never expires is available for schools that want to start small. Free test access for teachers on request.
Klangio Transcription Plugin
The same transcription engine, inside your DAW. Drop a track onto the plugin and get MIDI or notation back without leaving Logic Pro, Cubase, Ableton Live or Studio One, then export straight to Dorico, Sibelius, Finale or MuseScore. Available as VST3, AU and standalone, and included with every Transcription Studio subscription.
