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Audio feedback/cross problem with STM32F7 Discovery board

Question asked by J.Tobbe on Oct 13, 2016
Latest reply on Oct 13, 2016 by J.Tobbe
Hi.

There is audio feedback when line-in and headphone jack are used simultaneously on STM32F7 Discovery board.

This issue seems to have been discussed in other threads but it doesn't seem clear why this happens.

Could it be something wrong in the firmware libraries? Could it be a board layout issue with very close traces?

This is a problem I really would like to get solved since my application needs both line-in and headphone out at the same time.

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