I got Sonar 8 working ( kind of) with a new M-Audio 2x2 box.
 
Problem is the fader won't control the record level; moving it up and down doesn't affect the level, only changing the input gain on the M-Audio interface level does!  I'm using the Asio drivers and the only input choice I have is M-Audio M-Track Asio 1 in 1 0ut (left right or stereo)
 
Am I missing something simple?
 
thx
 
bob

Nope sorry I'm wrong.

Does adjusting the Gain knob work for you on the audio track? (Near the top of the track in the Inspector Pane).
 
I usually leave my faders at unity and use a decent signal from the audio interface, and then use the gain knob to trim the signal until it has a peak at whatever my target starting point is for the project (I tend to start things out at around -18 dBfs, but use whatever your desired starting point is).  Make sure your signal isn't clipping coming from your audio interface, before it even ever gets to Sonar.
 
If it is something else, then I am drawing a blank at the moment.
 
Bob Bone
 

robert_e_bone
Does adjusting the Gain knob work for you on the audio track? (Near the top of the track in the Inspector Pane).
 
I usually leave my faders at unity and use a decent signal from the audio interface, and then use the gain knob to trim the signal until it has a peak at whatever my target starting point is for the project (I tend to start things out at around -18 dBfs, but use whatever your desired starting point is).  Make sure your signal isn't clipping coming from your audio interface, before it even ever gets to Sonar.
 
If it is something else, then I am drawing a blank at the moment.
 
Bob Bone
 

But, do your faders change the record level?  Mine always did on my old computer with the m-audio 2496 card.
 
bob

The fader controls the volume/level coming OUT of the track.  Record levels are set as you are doing -at your hardware- and at the Gain control, as Bob mentioned.
 
Here's a signal flow diagram:
https://www.cakewalk.com/Documentation?product=SONAR&language=3&help=Mixing.07.html
 
 

Your recording level must be set before the signal gets to Sonar, i.e. using the gain or volume on your audio interface. If there is insufficient gain going into the interface, then you need a preamplifier of some sort in the chain prior to the input to the interface, or you need to increase the output of whatever is feeding into your interface. Nothing in Sonar can increase the recording level at an audio track without also increasing the noise level.
 
The simple reason this is so is as follows:
Your interface takes an analog signal (electrical power or voltage) and at some point converts it to a digital "signal," which is all that Sonar ever sees. An analog signal consists of audio signal, and a noise floor of inescapable electrical noise coming from the electronics in the analog signal chain. The noise is going to be encoded into the digital bunch of numbers at the same time that the audio signal is converted. If the analog signal strength is not sufficiently high relative to the noise A digital signal is just a bunch of numbers. The last chance you have to affect the signal to noise ratio is prior to the analog to digital conversion. After that anything that increases the digital signal also increases the digitally encoded noise, so if you increase the "volume" of the improperly encoded digital signal you will get audible hiss as you amplify the digital noise. 
 
Nothing in Sonar increases or decreases the analog signal. 

I wouldn't adjust the gain control on you Sonar track when in record mode. Leave it at unity as you would the fader. All adjustments to level should be done at the sound card or source. Sonar has no control over audio input until it gets to disk. So your audio could be clipping and you may not know it. 

slartabartfast
Your recording level must be set before the signal gets to Sonar, i.e. using the gain or volume on your audio interface. If there is insufficient gain going into the interface, then you need a preamplifier of some sort in the chain prior to the input to the interface, or you need to increase the output of whatever is feeding into your interface. Nothing in Sonar can increase the recording level at an audio track without also increasing the noise level.
 
The simple reason this is so is as follows:
Your interface takes an analog signal (electrical power or voltage) and at some point converts it to a digital "signal," which is all that Sonar ever sees. An analog signal consists of audio signal, and a noise floor of inescapable electrical noise coming from the electronics in the analog signal chain. The noise is going to be encoded into the digital bunch of numbers at the same time that the audio signal is converted. If the analog signal strength is not sufficiently high relative to the noise A digital signal is just a bunch of numbers. The last chance you have to affect the signal to noise ratio is prior to the analog to digital conversion. After that anything that increases the digital signal also increases the digitally encoded noise, so if you increase the "volume" of the improperly encoded digital signal you will get audible hiss as you amplify the digital noise. 
 
Nothing in Sonar increases or decreases the analog signal. 

Thanks, It;s been a long  time since I have recorded!
 
bob