Play Sound in Reverse

Hello Everybody ..
Is there any way to paly sound in reverse using App inventor ?
i have tried the playback rate (-1) in a webview but its not supported ..
is there any solution or a way ?
Thanks in Advanced ...

No, there is also no extension for that, AFAIK.
Use Audacity (→ EffectReverse) beforehand or an online method (website).

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