1.) Yes the voices were very clear. no static or anyhting like that. It sounded like spanish to me.
2.) Last night was the first time I have heard it. It stopped about 20 minutes after I posted and hasn't come back.
3.) There was music and voices at the same time. The music contunued when the voices stopped. It seemed like the voices had nothing to do with the music as it did not sound like singing to me.
4.) It was about 9pm when I heard them first. it may have gone on earlier, but I was not on that PC.
5.) My laptop was 3 feet away and din't pick anything up. Neither did my cell phone or TV.
I am going to try using my scanner to see if I can pick up anything that sounds similar to what I was hearing.
1) Usually this indicates an AM signal (not necessarily AM "radio"); but the mode--meaning that it is not a Single Sideband or FM signal). Your scanner will most likely only pick up FM signals in the VHF/UHF range (except for Aircraft 110-135 mHz, which is usually AM). Remember all three Romantic languages, Spanish, Portugese, and Italian can be confusing to someone unable to identify them. I'll go with your Spanish on this one.
2) Since last night was the first time you heard it, you can pretty much rule out a commercial AM broadcaster. Many smaller town 1 kW local stations are S/S (sunrise to sunset). Do an internet search in your area for local foreign language programmers, however again--that sounds like a REAL longshot.
3) This is really starting to sound like a pirate radio station (no licence, no FCC certifications, and illegal).
4) Evenings after dark are pirate station's best friend.
5) Your cell phone is all but RFI from VLF/LF/HF interference proof because it uses frequencies in the microwave range. Cable TV can be succeptable if cords are long. TV with home antenna (not cable) can be succeptable if the station is close, ungrounded, using trashy equipment that is turned up far past it's indended settings, or any combination of those.
From your answers so far, I'd say you had a pirate AM station between 25 mHz and 28 mHz using CB equipment and an external (illegal) amplifier.
Why I say pirate is because so far, it has been highly intermintent, you also didn't mention hearing commercials and people can identify commericals even if they don't speak the language.
In the USA, CB hit a peak in 1976 and has gone down to almost nothing since. Not a lot of truckers use it anymore. They use cell phones and GMRS. On the other hand, CB was and still is "The Poor Man's Cell Phone" in many Caribbean, Latin American, and South American countries. They couldn't afford private phone service (many people had to travel to a nearby town to make calls). If they had electrical service, they COULD get a CB and install a relatively inexpensive antenna and talk for miles.
They also bring that mindset to America. I can understand, in a way, their frustration if they get to an an area of the US that has little or no Spanish programming to want to get their CD player, fire up on a CB channel and become a DJ for a half hour.
If it is a pirate (and I'm still basing this on not a lot of information) he's right in your neighborhood--probably less than 2 or 3 blocks away.
If it becomes a habitual problem PM me and I'll hook you up with some people right in your area that can help.
ROX