voice message waveform preview and actual waveform mismatch

[HarHarLinks]

Steps to reproduce

send a short voice msg, not actually recording anything, microphone muted in hardware

What happened?

    "org.matrix.msc1767.audio": {
      "duration": 1792,
      "waveform": [
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
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        0,
        0,
        0,
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        0,
        0,
        0,
        0,
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        0,
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        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
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        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        0
      ]
    },

What did you expect?

matching

Operating system

arch

Application version

Element Nightly version: 2021081701 Olm version: 3.2.3

How did you install the app?

aur nightly-bin

[SimonBrandner]

Related/duplicate of #18587

[novocaine]

Downgrading to S-minor as the waveform should be accurate but this does not severely degrade functionality

[SimonBrandner]

Upgrading to S-Major as this breaks rendering of the voice message on Android. It also probably isn't spec-compliant wrong issue...