Read top to bottom. In each score read round 1 beats 1–4, A then B per column, then round 2 beats 1–4. Circle means A sound, square B sound, dash wait, question mark undecided. Colour is redundant. Two broad rows have a thick separator after four columns; copy A decisions into the second round while B can change. No-sound access evidences a composition plan, not actual hearing, timing or performance. The actual supplied Page Turn score/source can be encountered and responded to without sound; wider people/community contexts need varied appropriate sources.
A · A backing that comes round again
File: print/part-key.svg / print/part-key.pdf. Exact linear content: A circle is backing sound; B square is the other part sound; dash is wait. Two four-beat rounds share steady time. A repeats exactly across rounds while B can change. Verbatim printed text in layout order: SUBJECTNEST · FOUNDATION MUSIC | A repeated backing with another part that changes | A · A backing that comes round again | A = CIRCLE / B = SQUARE / DASH = WAIT | Two rounds of four steady beats · numbers restart 1–4 | TWO PARTS · TWO ROUNDS | A · BACKING COMES ROUND AGAIN | Copy all four A sound/wait choices into round 2. | B · THE OTHER PART CAN CHANGE | Choose a different B idea for round 2. | Circle = A sound / square = B sound / dash = wait. | Four local beat numbers restart in round 2. | The two parts share the same steady beat. | Make a tiny piece for a paper book or own idea. | Original resource · CC BY 4.0 · exact alternatives in pack. Raised/no-print/no-sound: Use two raised rows with circle/square tags and eight broad aligned places, a thick separator after four. Local numbers restart 1–4. Copy all four A choices; B may differ. Adult describes/moves only as directed.
B · Page Turn · author model
File: print/page-turn.svg / print/page-turn.pdf. Exact linear content: Original named computer-created work: A sounds at local 1,3 in both rounds; B at round 1 local 2,4 and round 2 local 1,4. Every other cell waits. Eight planned short events in eight beats. Verbatim printed text in layout order: SUBJECTNEST · FOUNDATION MUSIC | A repeated backing with another part that changes | B · Page Turn · author model | A = CIRCLE / B = SQUARE / DASH = WAIT | Two rounds of four steady beats · numbers restart 1–4 | TWO ROUNDS OF FOUR STEADY BEATS | ROUND 1 | ROUND 2 | A | B | 1 | — | 2 | — | 3 | — | 4 | — | 1 | 2 | — | — | 3 | — | 4 | — | A repeats: sound / wait / sound / wait. | B changes: wait / sound / wait / sound → | sound / wait / wait / sound. | An author model, not a human performance. | Original resource · CC BY 4.0 · exact alternatives in pack. Raised/no-print/no-sound: A round discs global 1,3,5,7; B square discs 2,4,5,8; dashes elsewhere. Read each column A then B, first round then second. Source card is part of the actual supplied work/context; sound remains optional.
C · Copy the backing, choose B
File: print/keep-backing.svg / print/keep-backing.pdf. Exact linear content: A at local 1,4 in both rounds. B first round 2,3; its second-round four cells are undecided question marks. Learner changes B while holding A. Verbatim printed text in layout order: SUBJECTNEST · FOUNDATION MUSIC | A repeated backing with another part that changes | C · Copy the backing, choose B | A = CIRCLE / B = SQUARE / DASH = WAIT | Two rounds of four steady beats · numbers restart 1–4 | TWO ROUNDS OF FOUR STEADY BEATS | ROUND 1 | ROUND 2 | A | B | 1 | — | 2 | — | 3 | — | 4 | — | 1 | ? | 2 | — | ? | 3 | — | ? | 4 | ? | A comes round again with the same four choices. | B round 1: wait / sound / sound / wait. | Choose B round 2; make at least one choice different. | Original resource · CC BY 4.0 · exact alternatives in pack. Raised/no-print/no-sound: Fixed A global 1,4,5,8; B first 2,3. Four broad blank B cells 5–8 are undecided, not waits. Child chooses a different second B pattern; exact neutral adult access gives no answer.
D · A repeats while B changes
File: print/change-part.svg / print/change-part.pdf. Exact linear content: A local 1,4 in both rounds. B round 1 local 2,3; round 2 local 2,4. Only B local 3 sound→wait and local 4 wait→sound change; A repeats exactly. Verbatim printed text in layout order: SUBJECTNEST · FOUNDATION MUSIC | A repeated backing with another part that changes | D · A repeats while B changes | A = CIRCLE / B = SQUARE / DASH = WAIT | Two rounds of four steady beats · numbers restart 1–4 | TWO ROUNDS OF FOUR STEADY BEATS | ROUND 1 | ROUND 2 | A | B | 1 | — | 2 | — | 3 | — | 4 | — | 1 | — | 2 | — | 3 | — | — | 4 | A repeats its complete round. | B moves a sound from local beat 3 to beat 4. | A steady backing can accompany a changing part. | The maker chooses the purpose and favourite version. | Original resource · CC BY 4.0 · exact alternatives in pack. Raised/no-print/no-sound: Build A 1,4,5,8 and B 2,3,6,8; dashes elsewhere. Compare B corresponding round positions and identify local 3/4 changes while all A decisions hold.
E · Our tiny two-part piece
File: print/my-piece.svg / print/my-piece.pdf. Exact linear content: Blank two-round A/B score. All sixteen question-mark cells are undecided. Learner chooses A first four, copies them into second round, creates B first four and a different second four. Actual sound/audience fields unset. Verbatim printed text in layout order: SUBJECTNEST · FOUNDATION MUSIC | A repeated backing with another part that changes | E · Our tiny two-part piece | A = CIRCLE / B = SQUARE / DASH = WAIT | Two rounds of four steady beats · numbers restart 1–4 | TWO ROUNDS OF FOUR STEADY BEATS | ROUND 1 | ROUND 2 | A | B | 1 | ? | ? | 2 | ? | ? | 3 | ? | ? | 4 | ? | ? | 1 | ? | ? | 2 | ? | ? | 3 | ? | ? | 4 | ? | ? | My idea: __ / A repeats / B tries another idea. | Actual makers/sound: NOT TRIED / _ | Actual audience: NOT SHARED / words: ___ | Original resource · CC BY 4.0 · exact alternatives in pack. Raised/no-print/no-sound: Eight broad paired columns with separator after four. Learner directs circle/square sounds or dash waits; A second four must copy first four. B second round changes at least one decision. Save first plan, no sound needed.
F · Page Turn · source and purpose
File: print/work-source.svg / print/work-source.pdf. Exact linear content: Page Turn is an original SubjectNest computer-created teaching model for NeuroForgeIO 2026: score and synthesized sound. Stated author purpose is to model repeated backing with another part changing so learners can try own duos. No named human performer, cultural tradition, community importance or actual effect is claimed. Verbatim printed text in layout order: SUBJECTNEST · FOUNDATION MUSIC | A repeated backing with another part that changes | F · Page Turn · source and purpose | A = CIRCLE / B = SQUARE / DASH = WAIT | Two rounds of four steady beats · numbers restart 1–4 | PAGE | TURN | PAGE TURN · original SubjectNest teaching model. | Computer-created score and synthesized sound. | No named human composer or performer. | Purpose: model a repeated backing with a change. | Intended use: help learners try their own short duo. | Paper-book use is a proposal, not a proven effect. | Source/rights: supplied pack, NeuroForgeIO, 2026. | Original work CC BY 4.0; source card gives full terms. | Sound is held for human/device/volume review. | No community tradition or importance is claimed. | Original resource · CC BY 4.0 · exact alternatives in pack. Raised/no-print/no-sound: Provide exact full source-card text plus two broad paper-page models if desired. Learner responds to the actual supplied score/source through any established system. No image/sound exposure is forced; source knowledge is not a listening test.
Fresh Round 1 · Which backing repeats?
File: check/round-1.svg / check/round-1.pdf. Exact linear content: Plan T A first local 1,2 and second 1,2; B first 2,4 and second 1,4. Plan U A first 1,2 and second 1,3; B same as T. All other cells wait. Public asks which A repeats and evidence of changed local positions. Verbatim printed text in layout order: SUBJECTNEST · FOUNDATION MUSIC | A repeated backing with another part that changes | Fresh Round 1 · Which backing repeats? | A = CIRCLE / B = SQUARE / DASH = WAIT | Two rounds of four steady beats · numbers restart 1–4 | PLAN T | ROUND 1 | ROUND 2 | A | B | 1 | — | 2 | 3 | — | — | 4 | — | 1 | 2 | — | 3 | — | — | 4 | — | PLAN U | ROUND 1 | ROUND 2 | A | B | 1 | — | 2 | 3 | — | — | 4 | — | 1 | 2 | — | — | 3 | — | 4 | — | Which A backing repeats exactly? Show each position. | Where does the other A change? What does B do? | What can the paper not prove? | Original resource · CC BY 4.0 · exact alternatives in pack. Raised/no-print/no-sound: T A global 1,2,5,6; U A 1,2,5,7; both B 2,4,5,8. Raised circle/square/dash equivalents with thick round separator. Read all marks neutrally; no classification/solution supplied.
Fresh Round 2 · Keep A, change B
File: check/round-2.svg / check/round-2.pdf. Exact linear content: A local 2,3 in both rounds. Given B local 1,2 in both rounds. Response B second round undecided. Keep all A and first-round B, make B second round exactly two sounds, local beat 1 wait, local beat 4 sound, and keep local beat 2 sound. Verbatim printed text in layout order: SUBJECTNEST · FOUNDATION MUSIC | A repeated backing with another part that changes | Fresh Round 2 · Keep A, change B | A = CIRCLE / B = SQUARE / DASH = WAIT | Two rounds of four steady beats · numbers restart 1–4 | TWO ROUNDS OF FOUR STEADY BEATS | ROUND 1 | ROUND 2 | A | B | 1 | — | 2 | 3 | — | 4 | — | — | 1 | — | ? | 2 | ? | 3 | ? | 4 | — | ? | Given B round 2: sound / sound / wait / wait. | Keep all A and first B. Second B has two sounds. | Start with wait, finish with sound; keep beat 2 sound. | Show changed local positions and what holds. | Original resource · CC BY 4.0 · exact alternatives in pack. Raised/no-print/no-sound: Fixed A 2,3,6,7; first B 1,2. The source B second is 5,6; response second B 5–8 blank. Child chooses from sound/wait under the stated rules; adult does not place an answer.