Agreed. Behringer stuff is a bit low-end quality-wise.
Buying low-end is more expensive than doing it right the first time.
Focusrite, the Alesis io2 or the Steinburg ur22 have been well reviewed.
I use 50ft cables and have no problem.
Try using one instead of the two 25' cables. The connector alone could be causing it, at the very least get some connector cleaner.
You can just run everything through a mixer and just shove the resultant stereo mix into the computer.
But you'll have to play every section perfectly cause there will be no separating instruments.
There were plenty of bands up through the 60s that recorded that way....
For getting the midi into the computer and triggering ezd, that's fine.
but once you have the song in the computer, are you going to be making sonic decisions on it?
If so, you'll be monitoring with the cheap pos 50-cent onboard soundcard and that's a no-no....
I dont want to stomp on your dream but I hate to see you jump into TWO dying industries. I've been flying r/c for nearly 40 years and the hobby shop industry is dead unless you're an internet catalog house. I go to several of the big trade shows every year and it's murder out there.
When diagnosing, Go cheapest to worst case scenarios:
Try another cable.
Think about bad socket on computer or interface, try on another computer.
After those, consider interface is failing.
I would highly suggest you do like the pros.... do the audio in your favorite audio sequencer and then do the video separately and match them up.
For the video:
On Windows - Sony Vegas Studio. Less than $50 and more than capable. Let you use all your audio vst's too...
On Mac - iMovie. Free...
I ran my 828 mkII for 5 years on my XP laptop (built in TI FireWire) with zero problems.
Now it's on my iMac, still running fine.
The combo USB/FireWire models were a bit iffy on Windows from what I heard.
The basic problem is all the build variations in the windows machines, some are iffy-ir...
Get the $50 Vegas Studio. 80% of the features of the big version (and you'll never miss the other 20%)
I've used it for music videos and commercial projects for years.
Windows Movie Maker is just the wrong program to use.
Agreed, get a $10 4-to-6 cable; used one for years.
That said, you may have problems with the laptop unless it has Texas Instruments firewire chips built in (most dont).
The crappy firewire chips on most motherboards are ok for drives and cameras, but not audio interfaces.
If it works, fine...
You can do it but the digital converters in (any) consumer cameras aren't that good. And they use rather nasty limiters and automatic gain functions to deal with outside noises that do rude things to audio. Fine for vacation shots but not for quality music.
Better to use a separate audio...