<li>Making sure the input signal is getting into the computer</li>
<li>Making sure that Ardour is talking to the correct sound card</li>
<li>Making sure that the sound card in use by Ardour is working properly</li>
<li>Making sure the input signal is getting into the computer</li>
<li>Making sure that Ardour is talking to the correct sound card</li>
<li>Making sure that the sound card in use by Ardour is working properly</li>