Hissing Air/Hallow Room Sound in Audio

Welcome to the forum.
It's just that - hallow room sound. It's the room and background noise, most likely, including whatever noise from your computer, the fridge in the next room, from outside etc.. A recording level too low can also cause noise that becomes audible when you need to raise the volume to a "mixable" level.
Of course, it could be hum from a ground loop or something "electrical" like that, but your short description doesn't  sound like that.

The solution is to treat your room with rock wool, carpets or whatever to dampen the echoes.
There's a lot of info on the web about acoustical treatment. Knowing nothing about your room, gear and monitoring methods it's not possible to say more. There are many acoustics savvy forumites here. I'm not one of them.

largo77


Thank you for your insight. I took stock of my room and deemed a good portion of the potential hissing is coming from the broken heater vent in the room a record in. You mentioned mixing, what is this? How does one do this? Is there a way to isolate the sound and remove it entirely? I tried searching about the intentet and found no such information that would relate to this product. I tried the forms but gave up, lot of stuff to look at. Also, how does one change the sensitivity on the microphone?

Well...mixing is mixing the sounds/tracks together in correct proportions to make a stereo "record".

There are ways to cut down the hissing, and even  remove it sometimes, but it means a lot of work and good software. I don't mean to sound rude, but if you don't know what mixing is, you have a long way to starting noise reduction with EQs or such.

You did not find anything with the search word "acoustic treatment" in the net? Try "room treatment" or whatever.  Those sites have nothing to do with SONAR because they are about treating the room, not SONAR. Or what was it you searched? Maybe I did not quite understand. 

You seem to have some homework to do..:o)  Did the mic have no manual?? There should be some kind of a driver/software which allows you to regulate the input level. SONAR can not control your microphone, especially as the USB mic is seen as a soundcard by your computer.

There's hundreds of pages of help files to study, and tutorials to do, but the problem with LE is that many topics in the manuals are about features that are not included in LE, unfortunately