Sample Playback Engine

Loads instrument samples, manages voice allocation, and keeps the audio graph alive across suspend and resume.

audio
webaudio
samples

Carried by: 8genomes
Alleles: 2current 2.0.0
Mutations: 1
Generations: 4spanned
License: MIT
Boundary confidence: 0.95semantic

First observed in KEYLIT at commit:27ad9016b4 on 2026-08-28, with origin confidence 1.00. That confidence is about the claim of where the capability started, not about the quality of the code.

Allele lineage

Each allele is a variant of the same capability. Select one for its own record, or compare two to see exactly where they diverge.

Compare 2.0.0 with

Multi-track studio engine

CAALLELE:AUDIO-ENGINE:2

Adds buses, sends and offline rendering for arrangement work.

Version: 2.0.0
Language: typescript
First observed: 2026-10-22
Content digest: sha256:9f2b41ce
Origin project: KEYLIT Studio
Descends from: 1.0.0

Produced by M-512 — Bus-based audio graph.

Inputs

scheduled-note-event
automation-curve

Outputs

audio-node
rendered-buffer

Test suites

audio-engine-suite
offline-render-suite

Loci

src/audio/engine.ts:1–512Jump to code ↗
github:uset82/keylit-studio · commit:9f2b41ce07 · AudioEngine, BusGraph, OfflineRenderer

Carried by 2 genomes

Carried by 8 genomes

Which projects express this capability, which variant each carries, and how much of the project it accounts for.

Genomes carrying Sample Playback Engine, with allele, inheritance mode, weight and evidence.
Genome	Gen	Allele	Inheritance	Share	Confidence	Evidence
KEYLITCAGENOME:01JKEYLIT7H2	0	1.0.0allele 1	Native	16%	0.95	TSTAutomated test. A test suite executed and asserted this behaviour.UPRUpstream maintainer. Asserted by the maintainer of the upstream project.
KEYLIT AccessibilityCAGENOME:01JACCESS2NV	1	1.0.0allele 1	Inheritedfrom KEYLIT	12%	0.95	UPRUpstream maintainer. Asserted by the maintainer of the upstream project.
KEYLIT KidsCAGENOME:01JKIDS0R4M	1	1.0.0allele 1	Inheritedfrom KEYLIT	14%	0.95	UPRUpstream maintainer. Asserted by the maintainer of the upstream project.
KEYLIT StudioCAGENOME:01JSTUDIO8QK	1	2.0.0allele 2	Mutatedfrom KEYLIT	26%	0.94	TSTAutomated test. A test suite executed and asserted this behaviour.
KEYLIT ClassroomCAGENOME:01JCLASS9WD	2	1.0.0allele 1	Inheritedfrom KEYLIT	10%	0.95	UPRUpstream maintainer. Asserted by the maintainer of the upstream project.
KEYLIT Kids ESCAGENOME:01JKIDSES5TC	2	1.0.0allele 1	Inheritedfrom KEYLIT	12%	0.95	UPRUpstream maintainer. Asserted by the maintainer of the upstream project.
Music ProducerCAGENOME:01JPRODUCER3F	2	2.0.0allele 2	Inheritedfrom KEYLIT Studio	30%	0.94	TSTAutomated test. A test suite executed and asserted this behaviour.
Junior Music TutorCAGENOME:01JTUTOR6HZ	3	1.0.0allele 1	Inheritedfrom KEYLIT	10%	0.95	UPRUpstream maintainer. Asserted by the maintainer of the upstream project.

Descent through the family

How far the capability has travelled, one row per generation. A generation with no carrier would break the chain, and would be visible here as a gap.

Mutations on this gene

M-512adopted
Bus-based audio graph
1.0.0 → 2.0.0 · refactor · 2026-10-22
Adopted by 2, declined by 1, confidence 0.86

Evidence for the annotations

Every statement the registry makes about this gene, with the record that backs it. An annotation with no evidence would not be shown at all.

audio.synthesis
reviewed · confidence 0.95
Sample-loading contract confirmed by the upstream smplr maintainer.
- UPRUpstream maintainer. Asserted by the maintainer of the upstream project.Upstream maintainer of smplr confirmed the sample-loading contract.2026-09-02

A gene here is a capability, not a file. “Sample Playback Engine” is the thing that persists; the paths under Loci are where it currently lives and can change without the capability changing. Every figure on this page is read from the seeded KEYLIT fixtures.