I just purchased a new computer (runs Windows 7)and reinstalled by copy of Sonar 7 Producer Edition. I just set up a M-Audio Keystation 88es and purchased EastWest Quantum Leap Symphonic Orchestra Gold Edition. I have all the necessary updates for both programs. I set up my controller and I can get sound out of it. I even hear the music when I play while it records; however, when I play back the recorded audio it plays the first note or two and the audio stops. I am unsure as to finding the solution. Might anyone know how to solve this problem?

Sorry to not answer but to just ask questions, but you have not really provided much to go on. 
A few things,
Are you  64 bit? Sonar 64 bit, Windows 7 64 bit? 

Also did you optimize the computer for running audio. Often you need to disable a few things like wireless internet and other CPU hogs.  Running the DPclat utility will show you whats up. 

You don't mention which audio interface your using either. 

I am running Sonar 64 bit with Windows 7 64 Bit. Not sure if I optimized my comp for audio, but I have Realtek HD Audio.

I have Realtek HD Audio.

That's your problem right there.


If you're serious about making music, and I guess you would be with an investment in EWQLSO then you also need to invest in an interface of professional quality.


The Realtek is nothing more than a cheap onboard chip which might be ok for Youtube & gaming but not for music production.


There are many to be had in all sorts of price points, so give as an idea of your budget and we can come up with a list of potential candidates

You need an audio interface. You won't get good results using the built-in sound chip. A USB audio interface would do the job. 

Somehow I new the answer before I asked the question.:0

Well I could spend about up to $200 to $250 on a new sound card. I did have a SoundBlaster card in my old computer. Maybe I should try that before I buy anything?

I'm 90% sure it's not the RealTek interface that's at fault. Though, yeh, it's pretty low-grade and not suitable for most recording scenarios. (OK for completely ITB EDM productions, for example, but not for any scenario that involves a microphone.)

More likely, you just have your buffers set too low because you're playing virtual instruments in real time. Try increasing your buffer sizes first, before spending money on a new sound card.

The SoundBlaster is not much better...but sure go ahead and try it. Just keep in mind that you're essentially running a Porche with a  Kia engine. If that's good enough for what you're trying to do, then so be it. 

I actually have found realtek sound cards to perform much better than sound blasters, but they are still not made for the job at hand. You will have timing/ sync issues. Believe me, been there done that.