Let's take things one at a time. I think most can be resolved, but we'll see .......

thiagocoracini wrote:

 

First: POD Farm doesn't work. It does not recognize my X3: "Non authorized device connected...."

Pod Farm does not work as a standalone editor with the X3. It only works as a plugin to your DAW. Try it with your recording software.

Second: When POD X3 become a windows audio device, the master volume (for recording and playback) does not work. Just work the "Wave" channell.

Try adjusting the monitor level in the Line 6 Midi - Audio devices control panel. It appears on the Inputs and Recording tab, I think.

in gearbox, when you move the wah pedal, it does not refresh the actual position knob in screen

I don't know about this one; maybe other responders can help

when you turn up the POD and the amp, if the amp is connected and the amp volume is set a little high, you can hear a very loud peak noise that could probabily damage the speaker.

Yes, it can be touchy to control tones and levels when using the X3's amp/cab modeling along with an actual amp. For best results, try to make your amp as neutral as possible and let the X3 do all the tonal colouring as much as possible. Search this forum for other threads on the topic of "X3 and amp". Many users get good results from what's called a 4-cable method. Alternatively, turn OFF the X3's am/cab modelling (select no amp/cab) and see how it sounds.

And how can the Windows sound output to the amp (as podxt) and NOT to the phone out?

Set your X3 as the cound card for your computer (seehttp://line6.com/community/docs/DOC-1453 for Vista; other docs for other systems are in the same /docs location). Then connect the X3 outputs to your amp/speakers.

Please, is that an isolated problem or more people are suffering with this too?

I think there are a number of different isolated things (not necessarily problems) that can be resolved. I think it's just a learning curve. Once you get past these things I think you'll be happy with your X3.