Hi! I hope you can help me please. Sometimes, when I hit space to play some midi tracks, some notes doesn´t sound. Then I stop the proyect. start again and  the problems is still there or not. I don´t know what happens. And sometimes, it sounds horrible, distorsion..radio signal.. I don´t know. I have a external sound card. Tascam us122L. Please help. And please, excuse my english.
Thank you

What driver mode are you using? For instance ASIO or WDM.

What driver mode are you using? For instance ASIO or WDM.

Hi
 
Please check/do the following:
 
1.  Make sure you have installed the latest software drivers for your audio interface.
2.  With Sonar NOT running, open the user interface for your audio interface, and set the Sample Rate to 44.1 k (44100), and try a setting for the ASIO Buffer Size of 128.  (your interface might use a slider to control the ASIO Buffer, and you might need to slide it to something between 9-11 milliseconds).
3.  Please go to Sonar Preferences (without being inside of any project) and try running with a Driver Mode of ASIO.  Click Apply if you change this to ASIO.
4.  Also in Sonar Preferences, try starting with a Sample Rate of 44100.  This MUST also match what is set for your audio interface, then exit Sonar and also power your audio interface off and back on again.  
5.  OK, now go back to Sonar and preview a song file, like an MP3 or WMA.  If that plays back OK, then you have gotten rid of your latency issues.
 
If the above does not work for you, please post back, and we will try to help you further.
 
Bob Bone
 

http://forum.cakewalk.com/SD3-64bit-not-playing-back-correctly-when-Transient-Shaper-TS64-applied-RESOLVED-m2869937.aspx
 
Could this be your problem?
 

scook
I believe you are thinking of Preferences > MIDI > Playback and Recording "Prepare Using nnn Millisecond Buffers". The default of 250 is too low, bumping to 500 or more prevents dropped MIDI notes.

Thank you very much. I have made all you have said, step by step and i have been using sonar for hours with 0 problems! Thanks again. 

That's great news.
 
I wish that they would take some of these common kinds of problems and make a sticky thread for things to look at and try.
 
I have actually saved off the questions I asked earlier, because this is the third time in I think less than a couple of weeks that the same issue has come up, and for which the same solution applied.
 
In the meantime, I will paste the questions into the next occurrence of this issue.
 
Bob Bone