@redbarchetta
The quicker you post the details on the followingL
1. Your computer hardware,
2. Operating system version and service level
3. Audio interface model and specific driver version used
4. Settings for the audio interface - Sample Rate and ASIO Buffer Size. You may have to use the 'ASIO Panel' button in Sonar to access and maintain settings for your audio interface. That button is found at: Edit>Preferences>Audio>Driver Settings . If that does not work, there is most likely a program running in the background that allows access/maintenance to those settings - that would be found in the System Tray area of your Windows Desktop, down in the lower right corner of your displayed Windows desktop. This behavior varies from interface vendor to vendor, and it's just the way life works sometimes. No biggie - use one or the other - whichever one works.
5. In Sonar the Driver Mode (Edit>Preferences>Audio>Playback and Recording), and this can hopefully be set to ASIO to access the ASIO drivers for your audio interface. If it is set to something other than ASIO, you want to set this to ASIO, IF you have an audio interface that has current ASIO drivers for your version of Windows. So, if you change the Audio Driver, you want to immediately click 'Apply'. This is so it immediately detects settings changes that are automatically done for you when you change Driver Modes. So, by applying that change, Sonar will change values for Recording and Playback Timing Masters and such - which you want to immediately use while you are already editing in Preferences.
6. In Sonar, what is the Record Bit-Depth set to? This is found in Edit>Preferences>File>Audio Data.
Sorry for all the typing - it's just so hard to know how to help when we have no idea what answers all of the above questions I am asking you to detail in response.
Anyways, beyond all of the above - the goal is to find out what your system will support, in terms of audio processing, and then seek out a balance between performance and stability.
In my opinion, approaching configuration for audio processing from a starting point of hopefully safe/viable settings - in order to expand on success, makes sense. To that end, I suggest using some starting settings of a Sample Rate of 44.1, an ASIO Buffer Size of 128, and a Recording Bit-Depth of 16.
If things sound OK at those settings, try changing the ASIO Buffer Size to 64 (if that size is an option for your interface), and retest after that one change.
If that is successful, then try changing the Record Bit-Depth in Sonar to 24, up from 16-bit. Then retest after this change.
If that works, you could try adjusting the Sample Rate for both the audio interface and in Sonar up to 48, and so on.
Give the above a shot - ask as many questions as you want - we will collectively try to assist.
Welcome to the family, we are an eclectic gathering of life, us forum folk.
Bob Bone