A preamp might help with levels but you'll still struggle for quality, you really need some sort of device from a known decent maker.
What you get depends on what exactly you want to record, what you want to connect and what mics you are planning to use.
Thanks for your help
Here's what I would do. First close AA 1.5, then....
Go to Vista's Control Panel-> Sound, choose the Recording tab and check that you have some inputs showing and enabled and also have little level meters shown to the right of the listed inputs. There are various options with these inputs - they may say "Working", "Disabled", "Not plugged in" and so on. If you don't see inputs, right click on the blank space in the Sound panel and make sure you are set to show Disabled and Disconnected devices.
In the panel, if you see no meters, they may appear if you randomly select and deselect inputs.
Then start AA 1.5 and go to Options-> Device properties->Wave In and make sure something like Realtek is selected and Use in Edit View and Try as WDM are ticked. Then open Device Order in the Options menu and make sure that the Realtek device is at the top of the list in the Recording devices tab.
It all then ought to work. Note that you may need to have something plugged into an input to make it visible to Vista and hence AA.
Let us know what happens.
Then I made the configuration changes you suggested. Note that Realtec did not show up in your Adobe config windows for input devices until I connected something to the microphone. Then I started to record. It seemed to pick up the sound okay inasmuch as the green bars flashed at the expected length. However, all I recorded was static (short squiggles in the middle of the vertical axis). Is this an audio card quality problem? Thanks for your help.
WRT the actual recording, am I right to assume that you have the green bars flashing on the Vista recording panel, but no level on the AA1.5 green level meters? If so you may need to double check the Device Order and related settings in AA. What are you plugging into this Mic input? Line level might be overloading it massively.
I don't really know much about the level settings you refer to. I think they vary between different Realtek cards anyway. Certainly the two laptops here with Vista and Realtek operate differently from each other. I don't actually use the realtek cards for any serious audio.
There is a minor issue with your forum, however. When I do a post message it asks me to log in and after I do so it asks me whether I want to transfer to some other forum. After that, my message does not seem to post and I have back up and write my message again and do the post one more time. I don't need support on this, just thought I would mention it.
Thanks for all your help.