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Stereo/Mono Twin 02 — Stereo (523 Hz)

Stereo twin of the 523 Hz tone (L=mono, R=phase-shifted) for stereo↔mono conversion tests.

File: WAV · Stereo Mono · 16000
Use case: Audio analysisConversion testing· Paired fixture

Stereo/Mono Twin 03 — Mono (659 Hz)

Mono 659 Hz twin — pair with the stereo file for channel-count / downmix tests.

File: WAV · Stereo Mono · 16000
Use case: Audio analysisConversion testing· Paired fixture

Stereo/Mono Twin 03 — Stereo (659 Hz)

Stereo twin of the 659 Hz tone (L=mono, R=phase-shifted) for stereo↔mono conversion tests.

File: WAV · Stereo Mono · 16000
Use case: Audio analysisConversion testing· Paired fixture

Stereo/Mono Twin 04 — Mono (784 Hz)

Mono 784 Hz twin — pair with the stereo file for channel-count / downmix tests.

File: WAV · Stereo Mono · 16000
Use case: Audio analysisConversion testing· Paired fixture

Stereo/Mono Twin 04 — Stereo (784 Hz)

Stereo twin of the 784 Hz tone (L=mono, R=phase-shifted) for stereo↔mono conversion tests.

File: WAV · Stereo Mono · 16000
Use case: Audio analysisConversion testing· Paired fixture

Tone with Click/Pop Transient

A clean 440 Hz tone interrupted by a short high-amplitude click at 0.4s — for click/pop removal tools.

File: WAV · Signals · 1 s
Use case: Audio analysisError handling

Trailing Silence 1s — 440 Hz Tone

A 440 Hz tone followed by exactly 1 second of digital silence. The tone should end at 2.0s — a direct fixture for testing trailing-silence trimming.

File: WAV · Silence Trim Set · 44100 Hz
Use case: Auto-trim testingAudio analysis

Trailing Silence 3s — 440 Hz Tone

A 440 Hz tone followed by exactly 3 seconds of digital silence. The tone should end at 2.0s — a direct fixture for testing trailing-silence trimming.

File: WAV · Silence Trim Set · 44100 Hz
Use case: Auto-trim testingAudio analysis

Trailing Silence 5s — 440 Hz Tone

A 440 Hz tone followed by exactly 5 seconds of digital silence. The tone should end at 2.0s — a direct fixture for testing trailing-silence trimming.

File: WAV · Silence Trim Set · 44100 Hz
Use case: Auto-trim testingAudio analysis

WAV — Codec-Set Source

The lossless PCM WAV source for the audio conversion set — the same 3-second tone every other codec in this group is encoded from. Use it as the reference when diffing encoders.

File: WAV · Codec Set · PCM
Use case: Conversion testingAudio analysis· Conversion set

White Noise

Three seconds of white noise with a flat power spectrum — a reference for testing noise handling, gating, and spectral tools.

File: WAV · Reference Tones · 3 s
Use case: Audio analysis

WMA — Windows Media Audio

The clip as Windows Media Audio (WMA v2) in an ASF container — Microsoft's lossy codec. For testing WMA decoding and conversion to open formats.

File: WMA · Codec Set · WMA v2
Use case: Conversion testingAudio analysis· Conversion set