Simple, high-quality software that never breaks your flow
About Us
What We Do
zelva plans, develops, and delivers software and web applications. In addition to our own products, we also offer consulting on software planning and development for creators and businesses.
Key Products
notave — a browser-based tool for creating clean, professional guitar TAB with minimal effort. Available via monthly subscription (Pro plan).
Development & Technical Management
We translate business requirements into technical specifications and provide end-to-end support from architecture design to project management. We bring deep expertise in desktop application development with C++/Qt/JUCE and audio/media processing software, serving as a playing manager who resolves challenges on both technical and operational fronts.
Contact usProducts
notave is a simple, browser-based tool for creating professional-quality guitar TAB. TAB & standard notation, playback, print, and video export — no heavy software needed.
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ARA Sleuth is a free, open-source debug tool for ARA2 plugin developers. Visualize ARA API call differences across DAWs in real time.
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How to Add Scrolling Tabs to Your Guitar Play-Through Videos — No Install, Rendered Right in Your Browser
How to add scrolling guitar TAB to a play-through video. Covers the traditional multi-step workflow (screen-recording tab software and compositing it in an editor) and a simpler one — export the TAB itself as a strip video with notave's Band (16:3) preset (1920×360) or Band Short (1080×540) for vertical Shorts, then overlay it in your video editor. The video export runs entirely in your browser.
Transpose Guitar TAB Without Re-Writing a Single Fret Number
How to transpose guitar TAB, starting with the manual method — one fret equals one semitone, how to re-anchor a note on another string (+5, or +4 across the B and G strings), and why open chords cannot simply slide. Interactive diagrams let you hear each step. Then see how notave's transpose feature does the whole job in one operation.
notave Manual — Full Feature Reference
Reference manual for notave, the browser-based guitar/bass TAB and staff notation editor. Covers sheet settings, staff/TAB/chord input, measure symbols (repeat signs, volta brackets), playback, metronome, backing band, export, and the full keyboard shortcut list.
Tools
Free tools to support music practice and composition
Chord Sheet Maker
Build a song chord sheet, hear an acoustic-guitar backing, and see the chord fingerings. Print-ready.
Chord Beat Sequencer
A free browser sequencer that combines a chord progression, a drum pattern, and an auto-bass line. Share your loops by URL.
Guitar Chord Chart
Look up guitar chord fingerings with diagrams. Browse common chord shapes at a glance.
Guitar Scale Chart
Look up guitar scale positions with diagrams. View all 5 CAGED positions for major scales and more.
Circle of Fifths
An interactive circle of fifths & fourths. Explore key relationships, diatonic chords, and build progressions.
Metronome
A free online metronome with adjustable tempo and time signature.