Web Sources SearchBy Regular Expressions

Is there a way to use replace or regular expressions in the SearchBy? For example I have an album titled "abc123 (disc 1)" and I want the SearchBy to default to "abc123".

Yes, for example:
[SearchBy]=$regexp(%album%,'\s+(disc.+)$',,1)

Perfect! It worked great. Thanks. I actually ended up using

[SearchBy]=$regexp(%album%,'\s+(.*)',,1)