I just want to know why cant i hear anythting.
Good question, given how little information you have provided I think I am going to blame it on the flying spaghetti monster.
So you might want to start by clarifying what is happening or not happening. Whether you are able to start Jack, if other programs are giving audio, what OS you have, what interface you have, what your current Jack settings are, etc.
Your subscriptions & donations are critical help that make it possible for full-time development of Ardour to continue. Your support is critical and much appreciated.
August goal US$6200 (US$74.4k/yr)
Subscribers 1647 US$4773.00/month
Support Ardour, get free upgrades: pay $1, $4, $10 or $50/month: