Dobrý den, chtěla bych se zeptat, jestli je normální, že při zvyšování nebo snižování hlasitosti se ve sluchátku ozve vysoký nepříjemný tón. Nikde v návodu jsem nenašla, že by se něco mělo ozývat a ten tón je velmi silný a nepříjemný. Jitka
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