Tympan Rev D size reduction

Hi,

We are working on reducing the PCB size of Tympan Rev D for our requirements, which are hearing aid functionality and Bluetooth audio streaming in a smaller form factor. For this, other than the SD card slot and pin headers for an additional AIC shield, is there a possibility to remove any more components?

Thanks

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Is it possible to use the onboard ADC/DAC of the Teensy 3.6 instead of the AIC3206?

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