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PCM2900: How to update/revise PCM2900 audio descriptor to change TerminalDescriptor.wTerminalType?

Part Number: PCM2900

Dear TI,

    I'm the engineer from www.buckhorn.com.cn which develops professional usb sound card for PODcast. 

    We're using PCM2900 as OTG connected to mobile phone. But we hit one issue. PCM2900 reports input device as LineIN not Microphone, then some game application on iOS will refuse to use LineIN.

    May I know whether there is any way to update the input device from LineIN to Microphone?  That is, anyway to revise TerminalDescriptor.wTerminalType from EEPROM/EFUSE, or something else?

Thanks a lot for your help in advance.

BR,

Fei Zhang