On the 12th of march I posted almost the same question. Gale helped me to make the right settings at the Transport tab. This was successful. But now, I’m back with the same problem. Recording is stalling again. It won’t start. Looked for the settings under the tab Transport but nothing was checked (no tickmark). I’m on Windows 7 with Audacity 2.0.6 installed. Maybe a new version? I installed the new 2.0.1 but no results to my problem. Gale, do you know a sollution? 
The new version is 2.1.0 ( Audacity ® | Download for Windows ).
As I said at Recording won't start [SOLVED] - #4 by Gale_Andrews I never expected that turning off Overdub would prevent the stall. It just means that when there is a stall it prevents the message about latency correction appearing.
How long is it since you rebooted the computer? Have you tried that?
Did you check that you have correct audio drivers from your computer manufacturer, as I suggested: Missing features - Audacity Support?
Are you using stereo mix to record internet audio, or Windows WASAPI? After checking your drivers at your computer manufacturer’s web site, I suggest you use Windows WASAPI to record if you are not doing so already:
- Open Device Toolbar .
- In the first (Host) box of Device Toolbar, choose “Windows WASAPI”.
- In the second (Recording device) box in Device Toolbar, choose the (loopback) input for the device that is playing back the audio.
- In the third (Recording Channels) box in Device Toolbar, choose mono or stereo.
- In the fourth (Playback device) box in Device Toolbar, choose the Speakers or Headphones that you are using for listening.
- Start playing the audio you want to record.
- Press the big red Record button in Audacity.
If you are recording YouTube or similar popular site, you can actually download the video using browser extensions or other solutions (use your favourite search engine to find out how). Please check the copyright restrictions on the site before recording or downloading songs from it.
If you download the video, then if you add FFmpeg to your computer ( Audacity Manual ), you can import the audio of the video into Audacity.
Gale
Hello Gale, my Sound Driver is correct. I did all you suggested but the needle keeps stucking in the left side. Microphone recordings are doing well. But recording sound from the internet (for instand sounds from an airport), stays unresolved.
gtz Jac
Are you using the WASAPI or stereo mix method?
If you use WASAPI, you must play the stream before you start to record. You should choose the (loopback) input for the same device you are using for playback.
Make sure Transport > Sound Activated Recording is off (there should be no checkmark (tick) showing against it).
If that does not help, we’ll need to see a list of all your audio devices. Please choose Help > Audio Device Info… then in the window that appears, right-click and choose “Select All”. Then right-click and Copy. Then paste the information in here.
Gale
Hello Gale. You wrote “If you use WASAPI, you must play the stream before you start to record”. Believe me Gale, I didn’t now that. I usually start recording and then I start the sound wich I want to record. But in this way it should be vise versa. Now I know for sure and I won’t never forget this, because…It works!!
Thanks a lot, Gale. gtz Jac
I’m glad it’s working. But it’s written further up at Again recording won't start - #2 by Gale_Andrews that using WASAPI, you must play the stream before you record.
You might not always have to do that after the first time. The first time you use the web player, the audio “endpoint” for the player opens, and it might stay open after that. If so, you can then press Record and start the player afterwards.
I know you might lose a second of recording if you have to start recording after starting the player. It’s possible we could change that by having WASAPI record silence, but that may not suit everyone.
But for now, if it’s essential that you press Record first, you will have to use Stereo Mix instead.
Gale