Problem with stability

i have the same problem and i want to know why it have a midi in and output when it does not work :(

You have to go in to the Sonar configuration and select what the default MIDI and WAV input and output devices are. That is usually handled by the ASIO driver. In your case you would select the USB mic for input, and for output you need to select your sound card. For midi you need to configure the midi controllers and the software synth or soft instrument you are using.
If you need any more detailed help I need to know what version of Sonar LE it is and what sound card. I am guessing it detected the mic and just needs the output device configured as I mentioned.

In sonar go to the options menu and select: Audio -->advance. and from the list select the "Asio" driver, then you'll have a new midi output (synthe sw...) select it to have a sound while playing MIDI files.

he's wrong you need to change your wdm driver to asio 4 all!

cheak msconfig start ups eating ram that needs alot ram be nice to add 1 gb more run cc cleaner.com tool get junk out update your software form webite fl latest flash adobe shockwave and java run spyware clean up close out all other programs when u work in studio program

try runing a cleaner ccleaner and ace utituies ok that stop those hickups give a atry make pc run alsot faster

It's probably your computer, more specifically the type of application you're running it on/in. Also, when you install or fiddle with the settings, you have to be careful because it can be so confusing fixinfg them.

Microsoft re-engineered the audio bus for Windows. HD Audio is hardware specific, in the sense that specific drivers have to be written to make a piece of hardware compatible with it. Roland is not writing a driver for the UA 25 because they want you to buy an UA 25EX. Get my drift? The UA 25 uses Kernel Streaming, the old way, which exists in parallel, sort of, with the HD Audio bus. But the new ways are always prioritized over the old ways in software, so there is bus contention (glitching).

To fix this there are a few things you can try:

1) Roll back to SP2. SP3 implements the HD Audio bus, so don't use that implementation. If your laptop has an HD audio sound card then I doubt it would work, but your UA 25 would.

2) Try ASIO 4 ALL. This fixed everything but glitching in VST instruments.

3) Reduce the amount of stuff your computer is doing. Optimize your OS by turning off the cute shaded windows and desktops and various processes that you don't need to see or use. There are sites for this. This increases available RAM, CPU time, etc.

4) Video hardware acceleration, sometimes, would fix bugs in software left in by not so clever programmers.

4) You can always just give-up and go along with the bastards and buy new stuff and toss the old stuff.

-SQA MGR

You need to install the driver accordingly, When you buy the product it comes with installation Disk. If you dont have it now still you have solution simply download the driver from the manufacturer's website
Here is the link
http://www.rolandus.com/products/productdetails.aspx?ObjectId=758&ParentId=114#

Good Luck

That's usually caused by problems with the usb port on your computer. The best solution would be to buy an PCI USB CARD that you would use only for your UAFX4.