embodiment is particularly relevant to the motherboard for a computer system such as a desktop PC that is electrically coupled to the acoustic transmission section for outputting an acoustic signal to the piezoelectric acoustic converting section (TG) (HP). Motherboard (HP) has a first acoustic generating circuit which is formed so as to generate a first control signal for the sound transmission unit (TG) (TES1). Motherboard (HP) further I have a second acoustic generating circuit which is formed so as to generate a second control signal for the sound transmission unit (TG) (TES2). Motherboard (HP) is connected via a first signal line (SL1) electrically coupled to a first acoustic generating circuit (TES1), second acoustic generating circuit via a second signal line (SL2) (TES2) to be electrically coupled, further I comprising a logic circuit formed to provide a first control signal or a second control signal to the audio transmission unit (TG). Embodiments also relate to a computer system having such a motherboard.
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