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Anchor text: Audible dynamic range (online test)

Wikipedia: Dynamic range

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Anchor text: Generating a tone sequence whose spectrogram matches an arbitrary text, online

Wikipedia: Spectrogram

Anchor text: Online Stereo Imaging Test (LEDR)

Wikipedia: Stereo imaging

Anchor text: Test tones playable online: helps localizing resonant frequencies in your room.

Wikipedia: Room modes

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Anchor text: Discriminating EQ frequencies by ear

Wikipedia: Equalization (audio)

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