Hi @Slydude! Thanks for your quick answer ^^
And sorry for my late reply.
I went to the websites u posted here, they are really helpful in another contexts, and that's why I already put the links on my bookmarks.
The part of listening a line-in micro in real time, I used one that communicates through radio waves, and it worked for me. However the distance between the micro and the receptor cannot be too much. Besides that, the receptor has to be at least at same height as the micro is.
In relation to send audio to the bluetooth speaker, I was being silly
I did have the input and output busy, but as the bluetooth speaker doesn't use cables, I just didn't need any. I just paired the device with my computer and send the audio I wanted to it.
Unfortunately I realized something else during the experience in loco.. The distance the speaker gets connected is too little for my purposes, so for now, I gave up to the experiment without cables.
If anyone wants to have more inputs and outputs available, it's better to use a sound card. I never used one, but maybe it's not that hard.
Take care.
Cheers,
windomearle