How convert .mp3 to the QByteArray
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@Mikeeeeee Why don't you read documentation?
https://doc.qt.io/qt-5/qiodevice.html#readAll"I tried to open the file, but it doesn't open for some reason (probably because of the format features)." - this does not have anything to do with file format. Check the reason why open fails: https://doc.qt.io/qt-5/qfiledevice.html#error
