Playback

When I playback something that has been written in music notation, not all notes play. Why is this?
How do I change the tempo of the vertical bar during playback so that it stays in time with the music playing in the notation?

The problem is rooted in the sound card that came with the computer. Doing what scook suggested will sometimes help.... it gives the hardware more time to think or look ahead, but ultimately, the sound card from the factory is woefully inadequate to do what Cakewalk software asks it to do.
 
This problem as you describe it, is worse with midi based music. It takes more time and power to process midi than it does audio.
 
Better performance is obtained with a dedicated USB based, external music interface, running ASIO drivers.
 
Most of us here are using the external interface and would never consider going back.

In midi, you can simply change the tempo to a much slower tempo. The "Now time line" indicator will move at the tempo on the project. This would allow more time to do whatever you need to do.... then when you finish, simply change the tempo back to the original tempo.
 
NOTE: this only works with pure 100% midi projects. If the project requires audio, DO NOT record the audio into the project at the slower tempo. Reset the tempo to the final tempo and then record the audio. Changing the tempo with audio will require realignment of the audio clips if you do change the tempo after recording them. Not impossible, but certainly a pain.

marcushnz
Not quite sure if I understand. When I playback some notation the vertical cursor moves probably double the speed of the music playback

That's got nothing to do with tempo setting, I guess. Some kind of sync thing. I've never heard of such a problem. So the Now Time really reaches the end before the playback (and the view stops scrolling??!!) and the project still keeps playing to the end normally? If so, very weird.