I’m trying to build a device that is capable to play an mp3 and at the same time analyze the reaction to it with a microphone (I already have an algorithm that fits my needs for that). I wanted to use the Music Module to achieve both.
To play the mp3 I use this class: https://www.ghielectronics.com/community/codeshare/entry/368
While playing a little with the music module I found out that when I record a sound the module also sends the signal to the headphone plug. So, for me it seems like there is no way to record from the line-in and play an mp3 at the same time.
Is this correct? If so, why is that?
Thanks for helping me!