Chord HeroPractice StudioGenerate theory or song charts, hear each shape, optimize transitions, and save an ordered practice sheet.
Choose a key, skill, genre, song context, and time budget. The assistant uses the bundled chord data only; it is not an external AI service.
Stage mode uses oversized cards and guarded keyboard controls: Space pause/resume, N/Right next, P/Left previous, M metronome. Focus mode hides setup after you start; Escape exits it.
Rehearsal is idle. · Performance page 1
A transparent planning estimate, not a timer. Select fewer cards or use simpler shapes to reduce preparation.
Permission is requested only after starting. Audio is discarded; only bounded card timing markers remain in this session.
Recording is off. Start it only when you want active-card timing.
Load a bundled song to enable section loops.
Band-lead mode hides diagrams in interactive and printable cards while retaining chord names, Nashville labels, rhythm, and section/progression context.
These controls move a bounded package between devices manually. No connection, account, upload, or faux real-time sync is attempted.
Local only — backend not configured.
PageDown/PageUp provide the keyboard-compatible next/previous fallback. When Web MIDI is available, the selected note advances rehearsal; this is opt-in and shares the existing MIDI permission.
Enter a target vocal key to see label-based arrangement suggestions.
Choose an audio file for this session only. It is not decoded, uploaded, or persisted.
Text-only checks help you decide whether to simplify or annotate before printing or performing.
Scores and notes are included in the next saved chart version.
Standard · E A D G B E. The diagrams retain their library frets; the six displayed pitches are calculated from this tuning. Print: US Letter, normal margins.
Versioned chart settings stay in this browser. History is capped at eight snapshots per name.
MIDI: MIDI is off. Start it only when you are ready to play.
Microphone: Microphone is off. It is used only after you press Start microphone evidence.
Permissions are requested only by these buttons. MIDI compares held pitch classes and suggests strings associated with missing notes. Microphone evidence is level plus strongest periodic pitch, not full polyphonic chord recognition.
Local MIDI misses: 0
Finger-fatigue index: 0/100 · low
Calculated from barre and stretch burden across the ordered selection. For a high reading, split the set, relax the fretting hand, and take breaks; this is simple practice guidance, not medical advice.
7 unique physical shapes; showing 7.
Tones: C · E · G
Fingers: low E: 1 · A: 3 · D: 4 · G: 2 · B: 1 · high E: 1
Avoid: No avoid strings; keep the barre even. · base fret 8
Rhythm: D U D U · 80 BPM
Tuning: Standard · E A D G B E
Balance the bass against the top strings so the barre does not sound bottom-heavy.
Focus: Treat this as part of the E-shape barre family so C connects to the same shape in other keys.
Tones: D · F# · A
Fingers: A: 1 · D: 3 · G: 3 · B: 3 · high E: 1
Avoid: Avoid the low E string. · base fret 5
Rhythm: D U D U · 80 BPM
Tuning: Standard · E A D G B E
Mute the low E so the A-string root stays in charge.
Focus: Treat this as part of the A-shape barre family so D connects to the same shape in other keys.
Tones: E · G# · B
Fingers: A: 1 · D: 3 · G: 3 · B: 3 · high E: 1
Avoid: Avoid the low E string. · base fret 7
Rhythm: D U D U · 80 BPM
Tuning: Standard · E A D G B E
Mute the low E so the A-string root stays in charge.
Focus: Treat this as part of the A-shape barre family so E connects to the same shape in other keys.
Tones: E · G · B
Fingers: A: 1 · D: 3 · G: 4 · B: 2 · high E: 1
Avoid: Avoid the low E string. · base fret 7
Rhythm: D U D U · 80 BPM
Tuning: Standard · E A D G B E
Mute the low E so the A-string root stays in charge.
Focus: Treat this as part of the A-shape minor barre family so Em connects to the same shape in other keys.
Tones: G · B · D
Fingers: A: 1 · D: 3 · G: 3 · B: 3 · high E: 1
Avoid: Avoid the low E string. · base fret 10
Rhythm: D U D U · 80 BPM
Tuning: Standard · E A D G B E
Mute the low E so the A-string root stays in charge.
Focus: Treat this as part of the A-shape barre family so G connects to the same shape in other keys.
Tones: A · C# · E
Fingers: low E: 1 · A: 3 · D: 4 · G: 2 · B: 1 · high E: 1
Avoid: No avoid strings; keep the barre even. · base fret 5
Rhythm: D U D U · 80 BPM
Tuning: Standard · E A D G B E
Balance the bass against the top strings so the barre does not sound bottom-heavy.
Focus: Treat this as part of the E-shape barre family so A connects to the same shape in other keys.
Tones: A · C · E
Fingers: low E: 1 · A: 3 · D: 4 · G: 1 · B: 1 · high E: 1
Avoid: No avoid strings; keep the barre even. · base fret 5
Rhythm: D U D U · 80 BPM
Tuning: Standard · E A D G B E
Balance the bass against the top strings so the barre does not sound bottom-heavy.
Focus: Treat this as part of the E-shape minor barre family so Am connects to the same shape in other keys.
Standard · E A D G B E · right-handed · no capo · 80 BPM · D U D U · US Letter · normal margins
Library diagrams are compatible with standard six-string guitar shapes. Transpose changes names and progression labels only; source voicings remain unchanged unless a compatible local shape is found.
Average confidence: 50/100
Scores use explicit MIDI matches, your manual hit/miss marks, repetitions, and optional metadata only. They do not claim to analyze recordings.
No local setlist items yet.
Local streak: 0 days · Session: 0 min · This week: 0 min
Offline readiness has not been checked.
The chart does not install a second service worker. Offline signals come from the existing app shell and browser cache only.
Import/export reads chord metadata only. Use files you have rights to use; no licensed song content is fetched or copied.
Choose up to three local audio/video files. Only filename/type/size metadata is retained for this session; raw media is never stored in chart localStorage or uploaded.
No session attachments.
C is acting as IV in the active key of G.
IV sound in the key of G.
This explanation comes from the bundled chord-function metadata and falls back clearly when a context is unavailable.