yes you can mate, you need to open the voice file and change the alert to something else.

I have it so it just beeps, but 99% of the time I just turn the alert off.

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Sept 03, M3, Silver Grey. Retro-fits: Modded Mk4 DVD Drive, OEM Bluetooth, VR Control, Rainbow Speaker Upgrade, Sony SOT Amp, HK Sub, CCFL, Intravee II, NightMode.