Test Tones Show How to Verify Clip Order in a Joined WAV File

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A six-second joined audio file can have correct total length yet wrong clip sequence, since duration alone cannot reveal ordering mistakes. The author proposes a test that assigns each input a distinct frequency, reorders the clips in an online audio joiner, and then inspects the downloaded WAV. A Python script generates three two-second 48 kHz tones at 220, 440, and 880 Hz, and the joiner is set up with no fades or trimming. Analysis of the output counts zero crossings in windows within each clip to estimate the frequencies and confirm the order. In the author's run the file came out as 44.1 kHz stereo and slightly short of exactly six seconds, which the author notes as separate observations.

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