I just installed guıtarix and jack with it. No matter what I tried i couldn't get any input signal. I'm using POD UX1 soundcard and ubuntu 14.04. Since i installed ubuntu there is nothing wrong with audio. I can get output from my sound card as default device but jack doesn't seem to recognize UX1.
here is my settings:

i must tell you im a complete linux noob
any help appreciated, thanks