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Loudness Ladder: Very Quiet (440 Hz)

1 s 440 Hz tone at linear amplitude 0.02 (~-34.0 dBFS peak): rung on the Wave E loudness ladder.

File: WAV · Loudness Ladder · 1 s
Use case: Loudness / LUFSAudio analysis· Conversion set

Low-poly Chair (GLB)

A low-poly chair (a seat, four legs, and a backrest) as a self-contained vertex-coloured GLB. Real, recognisable geometry (not a primitive) for testing glTF loaders, the 3D viewer, and thumbnailers.

File: GLB · Low Poly
Use case: Conversion testing

Preview of Low-poly Coffee Mug (GLB) — Actual file preview for Low-poly Coffee Mug (GLB)

A low-poly coffee mug (a cylindrical body with a looped handle) as a self-contained vertex-coloured GLB. Real, recognisable geometry (not a primitive) for testing glTF loaders, the 3D viewer, and thumbnailers.

File: GLB · Low Poly
Use case: Conversion testing

Low-poly House (GLB)

A low-poly house (walls, a door, and a pitched roof) as a self-contained vertex-coloured GLB. Real, recognisable geometry (not a primitive) for testing glTF loaders, the 3D viewer, and thumbnailers.

File: GLB · Low Poly
Use case: Conversion testing

Low-poly Robot (GLB)

A low-poly robot (a stacked-box character with a head, arms, legs, and antenna) as a self-contained vertex-coloured GLB. Real, recognisable geometry (not a primitive) for testing glTF loaders, the 3D viewer, and thumbnailers.

File: GLB · Low Poly
Use case: Conversion testing

Low-poly Tree (GLB)

A low-poly tree (a trunk with three stacked conical layers) as a self-contained vertex-coloured GLB. Real, recognisable geometry (not a primitive) for testing glTF loaders, the 3D viewer, and thumbnailers.

File: GLB · Low Poly
Use case: Conversion testing

LRC Synced Lyrics

An LRC synced-lyric file with ID tags (title, artist, album) and four line-level [mm:ss.xx] timestamps, for testing karaoke and music-player lyric sync and LRC parsers.

File: LRC · Subtitles
Use case: Subtitle parsingEditor testing

LRC: Enhanced Word-Level Timing

Enhanced LRC with per-word timings in angle brackets alongside the usual per-line timestamps: the format karaoke and lyric-sync apps consume. Includes the standard metadata tags, an offset field, and a final empty timestamp that clears the display. Simple LRC parsers read only the line timings and silently render the word markers as visible text.

File: LRC · Captions Edge
Use case: Subtitle parsingConversion testing+1· Conversion set

Lua Coroutine

Tiny Lua coroutine yield loop for language tooling.

File: LUA · Lua
Use case: Syntax highlightingCode parsing+1

Lua Hello

Minimal Lua hello for embedder and syntax-highlight tests.

File: LUA · Lua
Use case: Syntax highlightingCode parsing+1

Lua Metatable SAMPLE

Lua Metatable SAMPLE for Wave G language-tooling coverage.

File: LUA · Lua
Use case: Syntax highlightingCode parsing+1

Lua Table

Lua table with method colon syntax for parsers.

File: LUA · Lua
Use case: Syntax highlightingCode parsing+1

Lua: Intentionally Invalid

Intentionally invalid Lua table for error handling.

File: LUA · Lua
Use case: Error handlingCode parsing+1

LZ4: Single File

A text file compressed with the LZ4 frame format (.lz4), the container-free codec on its own, for testing LZ4 decompression and codec detection.

File: LZ4 · Compression · lz4
Use case: Compression testingConversion testing

M3U Playlist

An extended M3U media playlist with #EXTINF duration and title directives over three track references (local and remote), for testing playlist parsers and media players.

File: M3U · Feeds
Use case: Playlist & feed parsingEditor testing

M4A: AAC (MP4)

The clip as AAC in an MP4/M4A container (faststart): Apple's default audio container. For testing M4A parsing and MP4 audio conversion.

File: M4A · Codec Set · AAC-LC
Use case: Conversion testingAudio analysis· Conversion set

M4R: iPhone Ringtone

The clip as an M4R iPhone ringtone: AAC in an MP4 container with the ringtone extension. For testing that a converter maps M4R↔M4A correctly.

File: M4R · Codec Set · AAC-LC
Use case: Conversion testingAudio analysis· Conversion set

M4V: iTunes H.264 Clip

The clip as M4V: Apple's MP4 variant used by iTunes. Browser-playable; for testing M4V handling and M4V↔MP4 conversion.

File: M4V · M4v · 480x270
Use case: Conversion testing

Mailmap - All Four Rewrite Forms

One line for each of the four rewrite forms git's mailmap supports, including the two-pair form that matches on the commit name as well as the email. Four aliases collapse onto three canonical authors, which is exactly the transformation a shortlog or contributor report has to reproduce.

File: TXT · Repo Config · UTF-8
Use case: Config parsingConfig testing+1

Makefile Pattern Rules and Conditionals

Pattern rules with the automatic variables $@, $<, $^ and $*, ifeq/ifdef conditional directives, a vpath search path, and a define block invoked through $(call). All recipe lines are TAB-indented and echo-only.

File: MK · Build
Use case: Config parsingSyntax highlighting+1

Makefile Targets and TAB Indentation

A Makefile whose recipe lines are indented with real TAB characters, as make requires. Covers simple, conditional, appended and substitution-reference variables, .PHONY, and .DEFAULT_GOAL. Every recipe is echo-only, so running it does nothing.

File: MK · Build
Use case: Config parsingSyntax highlighting+1

Makefile with Space Indentation, Intentionally Invalid

An intentionally invalid Makefile whose recipe lines are indented with four spaces instead of the required TAB. This is the most common Makefile defect there is, and it is invisible in most editors, which is exactly why it belongs in a fixture set.

File: MK · Build
Use case: Error handlingConfig parsing+1

Malformed Document (intentionally corrupt XFDF)

Intentionally corrupt. An XFDF document with an unclosed field element and no closing root tag, so a strict parser must reject it and a lenient one must say what it recovered. Small on purpose - the damage is structural, not volume.

File: XFDF · Acroform · 5 fields
Use case: Form testingPDF form filling+2

Markdown FAQ: Api Errors

Short SAMPLE FAQ markdown (faq-api-errors) for docs renderers and SEO snippets.

File: MD · Markdown Twins
Use case: Editor testingConversion testing· Conversion set