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Very low frequencies LINEAR spectrum bug #9209

@calimero12345

Description

@calimero12345

Bug description

Hi.
I study very low frequencies, below 1000 Hz.
I record sound at frame rate of 220 fps.
When i show the spectrogram, scale MEL is ok (also other scales).
But the LINEAR scale is shifted down by 0.5 hz.

Infact, in other scales, i see a strong signal at 50 Hz, but at LINEAR scale this carrier signal is at 49.5 Hz. Why ?
I recorded at 220 fps.

Thank you very much.

I attach here the file test.wav

Giovanni Di Maria

Image

test.zip

Steps to reproduce

  1. Open the Wav file "test.waw" (or import it). The file is recorded at 220 fps frame rate.
  2. Switch to spectrum view mode
  3. Switch to LINEAR mode (other modes are OK !!!)
  4. if you zoom, the carrier at 50 Hz is shown at 49.50 Hz.

Expected behavior

I see the carrier at 49.5 Hz instead of 50 hz.

Actual behavior

No response

Audacity Version

Audacity 3.7.5

Operating system

Windows

Additional context

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    AU3-bugBugs from Audacity 3spectral toolsspectrogram, spectral brush, etc

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