GuideTone — Loop, slow, transpose & isolate any song

On Green Dolphin Street — GuideTone

GuideTone Player in the After Hours theme: a magenta waveform mid-playback on a violet-black ground, with named section markers Head and Solo, a bar-numbered chord lane underneath, and the full transport.

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The playhead splits the song — played in ink, still-to-come in sand
Pin the form with named markers
The chord lane rides under the audio

01 · Waveform

See the song you're hearing.

Import music you own — Files, iCloud Drive, AirDrop — and GuideTone draws it as a clean, musical waveform. Double-tap to jump, pinch to zoom, and drop named markers on the map: Head, Solo, wherever the form turns.

Beat detection reads the song's own pulse (♩ = 132 here, and it knows it's in 4/4), so everything downstream — the bar grid, the count-in, the snap — lines up with the music.

On Green Dolphin Street — GuideTone

The chord ribbon in Snap mode: detected chords Cmaj7, Cm7, D7, G7, Dm7 laid bar by bar under the waveform, with the detected key badge reading C major.

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The changes, bar by bar — detected on your device
It finds the key — ♪ C maj

Live — this one's playing

The changes slide under the playhead, and every beat ticks as it lands — this is Reader mode, rebuilt for the page. It follows the rain's tempo, so the slider below slows this too.

02 · Chord detection

It hears the changes.

GuideTone listens to the record and writes the chart: a bar-numbered chord lane that follows the music as it plays — Cm7 · D7 · G7, right where they sound. It names the key while it's at it.

Reader mode scrolls the changes past you like a bandstand chart; Snap mode locks them under the audio that sounds them. Every chord is editable — your ears outrank the model, always.

On Green Dolphin Street — GuideTone

The chord shapes lane under the chord ribbon: a large D7 guitar diagram on its lit plinth, each dot printing the job it does in the chord — root, third, fifth, flat seventh — with G7, Cmaj7 and Dm7 reading ahead beside it as smaller diagrams.

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The floating chord card: D7 magnified in front with G7 waiting behind it, and under them four beat dots and a one-bar countdown to the change.

Now, then next — every dot named for its job
Open the Chord Guide on this chord

03 · Chord shapes

Every chord, as a shape you can play.

The changes are only half the answer. Under the chord lane, GuideTone draws the grip: the chord sounding right now, big and lit, with the dots where your fingers go — each one printing the job it does in the chord, root, third, fifth, the tension — and the next few reading ahead, so nothing lands by surprise.

Simplify trims a busy chart down to plain triads or sevenths when C♯m7♭5 is more chord than today needs. Clamp on the capo and only the shapes move — the song keeps its real names — while Suggest finds the fret where the whole tune turns into easy open chords.

Tap the big grip and you hear it, strummed. Send this chord and the next into a card you can drag anywhere and size to your music stand, with the beat ticking and the bars counting down underneath — or open the Chord Guide right on the chord you're looking at.

On Green Dolphin Street — GuideTone

An A/B loop engaged over the bridge: the region shaded orange with Loop Start and Loop End flags, the loop toggle tinted, and three saved loops waiting.

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The Saved loops panel listing The bridge, Turnaround, and Last A with their time ranges — tap to load, drag to reorder.

A and B, set on the fly
Tinted while it loops
Save the hard parts by name

04 · Looping

Loop the hard parts.

Set A and B without stopping the music and the passage spins seamlessly — the loop lives in the native audio engine, so the seam never hiccups. Nudge either end to the beat until the loop is exactly the phrase.

Then save it by name — “The bridge”, “Turnaround”, “Last A” — and tomorrow's practice starts where today's left off.

Try it on the rain Behind this card the storm is looping too — drag the A and B clamps on the staff to move the rain.

On Green Dolphin Street — GuideTone

The Key trainer mid-run: the loop spinning, a readout pill showing C to D pass 1, and the floating Now/Next card promising the next key.

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Now → Next, always in the corner of your eye
C → D · pass 1 — hands-free

05 · Loop trainer

Practice that pushes back.

Arm the Speed trainer and every pass nudges the tempo — 70% to full, two points at a time, until you're playing it at speed without noticing the climb.

Arm the Key trainer and the loop walks the keys for you: up a whole step each pass, up in fourths, down in half steps — whatever interval you set, for as many passes as you want to sit in each key. Stop, and the song returns to where you started.

Trainer — GuideTone

The Trainer hub: a Speed section with From, To, Step and Every steppers, and an armed Key section set to an interval of a major 2nd every pass, with the path preview C, D, E onward.

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Arm it — the loop does the rest
Pick the interval — the sign is the direction
It shows you where you're headed

05 · The hub

One dial for both trainers.

Speed and Key live in one hub and run together if you dare — ramp the tempo while the key walks. The Now → Next card floats over the waveform so tomorrow's key never ambushes you.

The playback row with tempo pulled to 85 percent and transpose at minus 2 — the chord lane and key badge re-spelled into B flat.

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85% — slower, same pitch

06 · Tempo

Half-speed, full pitch.

25% to 200% with studio-grade time-stretching — no chipmunk, no smear, no drift, and magnetic detents at the useful stops. Slow the solo until you can hear every grace note, then walk it back up.

Try it on the rain

100%

The drops fall later — but each one is still the same drop. Tempo 100% · Pitch +0 st, always.

On Green Dolphin Street — GuideTone

Transpose at minus two half steps: the readout shows −2 · B♭ maj and the entire chord lane — B♭m7, C7, F7, B♭maj7 — has re-spelled itself into the new key.

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−2 · B♭ — into your horn's key
The whole chart re-spells itself

07 · Transposition

Any song, your key.

Six half-steps either way, artifact-free. Drop “Green Dolphin” a whole step and everything follows — the chord lane, the key badge, the trainer's key path — re-spelled into B♭ like the chart was written there.

Tenor and soprano players: that's concert pitch handled. Singers: find the key where the bridge stops hurting.

On Green Dolphin Street — GuideTone

The Mixer desk open over the track it is mixing: the TRACK and STEMS power keys, four stem strips — Drums, Bass, Other, Vocals — with the Bass solo lit, the practice-sounds rack, and the MAIN fader.

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Solo the bass — steal the line
Flip between the original and your stems
Balance the band around you

08 · Stem separation

Split the band — on your device.

Two, four, or six stems — drums, bass, vocals, the rest — separated by a neural engine that runs entirely on your own device. Nothing uploads. Ever. The cloud never hears you practice.

Solo the bass to transcribe the line. Pull the drums and keep time yourself. Mute the sax and the chair is yours. Drop the vocal and it's karaoke — and with the words on screen, you have the whole song to sing.

Try it on the rain

Four rains are falling, one per stem. Silence a color and listen to what's left.

On Green Dolphin Street — GuideTone

The instant backing track: the Export card open on Stem mix with the Vocals fader behind it at zero, its key and tempo prefilled from the practice settings, and rows for file format and quality.

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Vocals to zero…
…and export the mix exactly as you hear it
WAV or M4A, Standard or High

09 · Backing tracks

Print your backing track.

Slide the vocals — or any stem — to zero, balance what's left, and Export Stem Mix bounces a single file mixed exactly as you hear it. Faders, mutes, solo — what you heard is what you get.

Key and tempo come prefilled from what you've been practicing, so the file you hand out is the one you rehearsed. Save it as WAV when you want it uncompressed, or M4A at Standard or High.

An instant play-along for the gig, the classroom, or the practice room. Loop exports work the same way: just the phrase, as audio.

On Green Dolphin Street — GuideTone

The record arm tray open on the Player: a live green level meter reading −8 dB with peak hold, the capture gain slider, a Count-in one bar chip, and the red Start button — with a use-headphones advisory beneath.

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The meter reads what lands on disk
Record-along, right on the transport
Counts you in — one bar ahead

10 · Record

Play along. Keep the take.

Tap ● and the arm tray springs open — no modal, the Player stays live. Set your level on a real meter (it reads exactly what lands on disk), dial in capture gain, and Start counts you in at the song's own tempo.

GuideTone records your instrument and the backing as separate layers, so in Review you balance the two before it saves one clean take — straight to your Recordings shelf.

On Green Dolphin Street — Chart

The Chart mid-playback: a jazz-engraved chart with rhythm slashes, the current bar highlighted, the beat cursor inside it, and Head and Solo markers pinned to the staff.

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The current bar lights up as it plays
Your markers land on the chart too
Petaluma — the hand-inked jazz face

01 · Follow the chart

The chart that follows the music.

Press play and the page reads with you: the current bar carries a highlight, a beat cursor walks the measure, and the page turns itself — the chart scrolls to keep the music in view.

It's the same playhead as the Player, so your loops, markers, and trainers all work from here. Practice from the chart; the audio follows.

On Green Dolphin Street — Chart

The Chart transposed down two half steps: the entire chart re-engraved in B flat — key signature, every chord symbol — with the playback row reading 85 percent and minus 2.

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Down two — the chart re-engraves in B♭
−2 · B♭ — right on the stand

02 · Player controls

Transpose the page, not just the sound.

The playback row rides the bottom of the chart: pull the tempo to 85%, drop the key two half-steps, and the whole page re-engraves — key signature, every chord symbol, the trainer's key path.

Horn players: the chart finally reads in your key while the record plays in it too.

On Green Dolphin Street — Editing

The Transcription Editor over a song: the recording's waveform across the top with its Head and Solo markers, Cmaj7 selected on the staff's chord boxes, the Chords palette open below it with C, natural and maj7 lit, and the piano along the bottom.

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Tap a chord — it glows, the palette inspects it
Root, quality, slash bass — your call
Key and meter from any bar, on Key & tempo

03 · The editor

Your ears outrank the model.

Hit Edit and the Transcription Editor opens over the recording: write a melody or a solo on the song's own bars, tap any chord to open it — root, quality, slash bass — or drag one to move it. Every edit saves as it lands, and Undo steps back through them.

Key & tempo sets the key or the time signature from any bar, and tempo lives right on the playback row — the whole chart, correctable at speed.

Birdlike — Transcription Editor

The Transcription Editor on Birdlike: a transcribed solo engraved on the song's own bars, with accents, a slur, a hairpin, ties and chord symbols; the caret in Write mode on bar 35 under Marker 1, the recording's waveform across the top; the category rail down the left, the note values under the page and a piano along the bottom.

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Your notes, on the record's own bars
Pick a value, play it — it lands at the caret
The recording runs underneath: Now, and your markers

01 · Write what you hear

The solo, on the page.

Pick a note value and play it on the piano — or type it on a keyboard — and it lands at the caret, on the bar the record plays it in. Slow the song down, loop the phrase, and write until it matches. The first note in a bar of slashes turns the rest of the bar into rests, ready for the next.

Chords, marks and phrases share the page, and the key or meter can change from any bar. Every edit saves as it lands; when it's done, Export sends the chart with your notes to a PDF or to MuseScore.

On Green Dolphin Street — Karaoke

The Karaoke page of the same screen: the line being sung lit word by word, the chords sitting in time on a beat ladder above the words, bar numbers down the left margin, and Head, Solo and Outro markers between the lines.

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Staff or words — one screen, two readings
Detect the lyrics, on your own device
Each word lights as it's sung
The chords, in time above the line

01 · Read the words

The words, in time.

Press Detect and GuideTone listens to the song and writes down what is sung — on your own device, like everything else here — then lines every word up with the audio.

Read it as a chord sheet, or set it on a stand and read it from across the room — the page turns itself a phrase at a time, at the size you chose for where you're standing. Jump to any beat, hold a line to loop that phrase, and if a word came back wrong, fix it right in the sheet.

On Green Dolphin Street — Karaoke

The Karaoke page of a song sung in Korean: three lines of Hangul, the phrase being sung lit word by word, its long first line wrapped onto a second row with the whole phrase on the page, and the chord ladder in time above the words.

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The chords, still on the ladder above
Each word lights as it's sung — here, in Korean
A long phrase wraps, and stays on the page

02 · In 99 languages

The words come back as they were sung.

Detect recognizes 99 languages on its own — there is no language to pick — and writes down what it hears in the language the song is sung in, in that language's own script, not a translation. The sheet reads the same way whatever the script: the chords in time above the line, the phrase you're on lit word by word.

A script that wraps deep gets the room it needs. A long phrase folds onto a second row and the page parks the whole of it in view, so the line you're singing never hangs off the top. How clean the words come back still depends on the mix, same as in English.

Sunrise — Composer

The Composer mid-writing: a twelve-bar tune in F with chord symbols, slurs, a tie, dynamics and hairpins engraved on the page, the caret in Write mode on the first empty beat of the last bar, the tool rail down the left, the note values docked under the page and a piano keyboard along the bottom.

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The caret waits on the next beat
Whole note to 32nd, rests, dots, ties, triplets
Each key sounds as you touch it, and writes
Chords, marks, key and tempo, bars, the form

01 · Write it down

Your tune, on the page.

Add → New score… opens a blank page with its key, meter and tempo. Pick a value, tap a note on the piano — or type it on a keyboard — and it lands at the caret, engraved, and you hear it go in.

The rail holds the rest of the page: chord symbols, dynamics, slurs and hairpins, a new key or tempo from any bar, repeats with first and second endings, segno, coda, D.S. and D.C. Copy, cut and paste bars — or write a ii–V–I once and Bars writes it again in all twelve keys, around the circle.

Blue Morning — Score

An opened MusicXML lead sheet in B flat: the title, rehearsal marks A, B and C, a tempo of 112, chord symbols over every bar, dynamics and a hairpin, and a repeat with first and second endings, with an Edit button at the top right.

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Rehearsal marks and tempo, as the file wrote them
Repeats, with first and second endings
Tap any note to hear it
Edit opens it in the Composer

02 · Open · Export

The scores you have, engraved and playable.

A MusicXML or .mxl file from a notation app opens from Add → Open a score file… and lands on your Scores shelf. A transposing part reads as its author wrote it, or at concert pitch. Anything the page can't draw yet is listed, and your original file is kept.

When it's done, export it: a PDF to print, or MusicXML for MuseScore — written for your instrument, or at concert pitch.

Edit — On Green Dolphin Street

The Track Editor mid-session: a span cut to silence with seam markers, the chord lane above the transport, an armed Undo, a 1.5 second fade-in and a plus 2 dB gain trim with one-tap Normalize.

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Cut to silence — seams marked, nothing lost
Copy · Paste · Cut · Undo — surgery with a safety net
Fades on the ends, baked only when you Save
One-tap Normalize

01 · Cut · Copy · Paste

Edit the take, keep the original.

Select to the beat (snap knows the bar lines), then cut — close the gap or leave silence — copy, paste at the playhead, undo, redo. Every edit re-renders from the original audio, so there's no generational loss, ever.

Fades, gain, and one-tap Normalize ride the output stage; audition slower without touching the saved audio. Then Save — or Save as Copy and keep both takes.

Chord Guide — GuideTone

The Chord Guide on D7: the chords of the loaded song across the top with their roman numerals, root and quality pickers below, then a backlit panel holding a large guitar chord box whose dots print root, third, fifth and flat seventh, a row of chips naming the note each string sounds, a reading column beside it spelling every string out in words, and three curated positions running underneath.

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The chords in the song you just loaded
Every dot named for its job in the chord
What each string actually sounds
Every position up the neck

01 · Every way to play it

Every chord, every way to play it.

Pick a root and a quality and GuideTone draws the shape — on a guitar neck and on a piano keyboard — with every dot named for the job it does in the chord: root, third, fifth, the tension. Under the diagram, a row of chips prints the note each string or key actually sounds, so a grip spells itself out left to right.

Beside it sits the reading: string by string, key by key, in real text that grows with your device's type size — position, note, interval, and the interval's long name. Under that, the positions run as a contact sheet. Tap one and it takes the stage.

Load a song with chords detected and the guide fronts that song's chords, capo and all — one button on the Player's chord lane opens it on the chord you're hearing. Left-handed? One switch flips every diagram in the app.

Chord Guide — GuideTone

The Chord Guide's piano stage on D7: a keybed with the pressed keys washed in and labeled root, third, fifth and flat seventh, a chip under each pressed key printing the note it sounds, the reading column spelling D3, F sharp 3, A3 and C4, and root position with its two inversions running underneath.

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A chip under every key it presses
Tap the speaker — or just tap the chord
Root position, and its inversions

02 · The diagrams sing

The diagrams sing.

Tap a chord and hear it — strummed on a real nylon-string classical guitar, or played on a grand piano. Drag across the strings, or across the keys, to pluck the notes one at a time. Tap again to damp.

Strings and keys light as they sound, so a light always means a sound happened. Back on the Player, switch on the pick and every chord strums as the song reaches it, in time.

Recorded instruments, not a synthesiser — and they can never reach a take: a pluck is mixed in after the recorder's tap, by construction.

Live — you play this one

Press the box to strum it, or drag across the chips to pluck one note at a time — each chip prints the note that string actually sounds, which is rarely the string's own name.

Synthesised here in the page. In the app these are recorded instruments — same grip, same notes, fuller tone.

Metronome — GuideTone

The metronome running at 120 BPM: the downbeat blooming orange across a four-beat row, a large tempo dial, and a bench of time signatures, subdivisions, click voices, and presets.

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The downbeat blooms — accents you can see
Any meter — 2/2 to 12/8
Save your setups by name

01 · Pulse Deck

A click you can see coming.

The beat row blooms on every click — downbeat orange, the rest quiet — so the accent pattern is visible at a glance. Four voices, subdivisions down to triplets and eighths, tap tempo, and presets for the setups you keep coming back to.

Sample-locked in the native engine, so the click never drifts — and when you record from here, the count-in reads the song's own detected tempo.

Metronome — Tempo trainer

The tempo trainer mid-climb: the dial at 84 BPM with the readout 'To 120 BPM, next step in 1 bar' and the trainer card armed with its From and To steppers.

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Already climbing — 80 → 84
Next step in a bar — keep playing
From, To, and the pace — then go

02 · Tempo Trainer

The climb you don't notice.

Set From, To, and the step, and the trainer raises the tempo while you play — a nudge each bar, 80 to 120, until the readout says you've arrived. No stopping, no touching the dial; the click leads and you follow.

It's the metronome's cousin of the Player's Speed trainer — the same idea, aimed at scales, rudiments, and everything you practice without a record.

Tuner — GuideTone

The tuner locked on A4: the note glowing green, the readout at 0.0 cents in tune, with a mode row for chromatic, guitar and bass, transposition keycaps for C, B flat and E flat, the A4 reference at 440 Hz and a sensitivity slider.

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The tuner reading 19.8 cents flat: the pitch orb sitting amber to the left of the target ring.

Locked — the lantern blooms green
Chromatic, or a guitar and bass headstock
B♭ and E♭ horns read in their own key
Calibrate the A4 reference

01 · Pitch Lantern

Land the note, watch it bloom.

Your pitch orbits the target — amber when you're shy, red when you're wide, and a green bloom the moment you lock. Cents on the dial, no squinting at needles.

Saxophonists and clarinetists: flip the keycap and the tuner reads in B♭ or E♭ — concert pitch stays under the hood. A4 is yours to calibrate, and so is how hard the tuner listens.

Guitarists and bassists get a headstock instead: switch to Guitar or Bass and the six — or four — tuners light up one at a time as you work down the strings.

Try it on the rain Two gutters are dripping behind this card — almost, but not quite, together. Rest your cursor over the water and hold still: the drips settle into one pulse. That's what in-tune sounds like.

Guitar — GuideTone

The playable guitar mid-strum: a twenty-two fret classical neck with its six strings named E, B, G, D, A and E down the nut, a grip of six notes lit across the third and fifth frets with those strings still vibrating, a bench of neck and tuning keycaps above it, and a rail showing which stretch of the neck is on screen.

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The same neck dressed as an electric: a maple board with black block inlays, three notes lit in a row along one string as a line runs up it.

Three necks, six tunings
Move the window, not your hand
Every note sounds the moment you touch it

01 · First Position

A neck you can actually play.

Twenty-two frets, six strings, and every cell under your finger. Strum across the strings, pluck one, or slide along a line — each note sounds the instant you touch it, and the string you struck is the one that lights and rings. A light here only ever means a sound happened.

Pick the neck you want under your hands — classical, dreadnought or electric, each with its own board, inlays and grain, all voiced by the same recorded nylon-string guitar. Then pick the tuning: standard, Drop D, E♭, DADGAD, Open G, Open D. The guitar remembers both, and left-handers flip the whole neck with the same switch that flips every chord diagram in the app.

Moving up the neck happens on the rail above the board, not on the board itself — so the strings never slide out from under the hand that's playing them. It sits on the Tools rack beside the metronome, the tuner and the Chord Guide, ready when you are.

Turn any recording into your practice room.

The Player.

See the song you're hearing.

It hears the changes.

Every chord, as a shape you can play.

Loop the hard parts.

Practice that pushes back.

One dial for both trainers.

Half-speed, full pitch.

Any song, your key.

Split the band — on your device.

Print your backing track.

Play along. Keep the take.

The Chart.

The chart that follows the music.

Transpose the page, not just the sound.

Your ears outrank the model.

The Transcription Editor.

The solo, on the page.

Karaoke.

The words, in time.

The words come back as they were sung.

The Composer.

Your tune, on the page.

The scores you have, engraved and playable.

The Track Editor.

Edit the take, keep the original.

The Chord Guide.

Every chord, every way to play it.

The diagrams sing.

The Metronome.

A click you can see coming.

The climb you don't notice.

The Tuner.

Land the note, watch it bloom.

The Guitar.

A neck you can actually play.

Practicing with it? Tell me about it.