Hey guys, I am new here, and I am making RPG map something like, Special Force (or how ever the popular map was called) but much better.
I have downloaded few unites and buildings from this website and I don't know where to extract them to, or what to do with it.

Also I have a question if anyone has any sound pack in which are simple calls like "welcome", "It's going be dangerous", "watch out" or any calls similar to these, and how to install them.
I am using the X-tra editor.
Also what is the maximum size and length and bit rate of wav sound file?
Also is there any posibility of adding skills to the unites like storms or other? and how to?
Please help!

If you're talking about custom graphics for units and such, you'd have to make a mod, which is very different from making a map. Same goes for giving units different abilities. We've got a lot of people here who can help with that if you wanna do it, but you won't be able to host your map on battle.net like normal.

For the sound, I'm not sure what the bitrate should be, but anything that makes your map bigger than 1 or 2 megabytes will take a while to download on battle.net, so you'll want to take that into account.

Also, use Scmdraft or Chkdraft instead of X-tra editor. X-tra is very outdated and does not do half the things the other two do.

I'm not aware of any sound pack like this. Installing them is easy, just open the Sound File Manager and import, then reference them in the trigger. You can use virtual sounds that reference the player's local copy of sound files which means you don't have to attach them to the map, which means you can use audio from the starcraft and brood war campaign as well, but I don't find the monologues to be particularly useful.

Maximum bitrate should be 44100 Hz, 16 bit. There's likely no limit to the length, but wav files are huge.

http://www.staredit.net/topic/8760/

I recommend Mono, 32000 Hz; any higher quality will subject the sound to the bug where the last second of the sound repeats once or twice. Mostly prevalent with short wavs, but still possible with longer ones.

People often add a few seconds of silence at the end of the wavs to circumvent that issue, but Mono 32000 Hz (and lower quality) sounds will never experience that, and that's often good enough sound quality for anything other than voice acting.

ya 32kHz is plenty. Voices have a range of 0.3 - 3.4 kHz so 7kHz sampling frequency is sufficient to perfectly replicate that.
It's sound effects with high hissing sounds or basically any kind of music but especially music with percussion instruments need high frequencies. They go even higher than the human hearing spectrum which ranges at 14-20 kHz getting lower with age (~15kHz-16kHz for 30yo). So unless you're catering for audiophiles that are around the age of 20 or younger you don't lose anything when using 32kHz. (numbers on hearing capability depending on age obviusly approximated as they vary per individual - although not too much)

Woah, I did not know that about the 32000 Hz. Someone should add that to the quirks and nuisances page??

What exactly do you mean? The part where 44.1kHz repeat a second, and others don't?
I mean you don't have to use 32kHz specifically. You can freely choose the sampling rate of WAVE files.

Speech does remain intelligible, but at such low sampling rate, there's no denying it sounds incredibly canned and muffled. I agree 32 kHz is fine in many cases, but to me there's still a noticeable difference when compared to 44 kHz, especially when some special effects are involved with the VA.

Note that Stereo 32000 Hz will still have the repeat bug. However, if I'm not mistaken, Stereo 22050 Hz doesn't. But in any case, I'd keep the wavs mono unless I need it to sound like it's coming from a certain direction or something... since stereo to mono helps a lot with file size.

I was speaking purely from a theoretical standpoint, based on what wikipedia seid were voice frequencies. What I didn't account for was hissing sounds that are formed without the use of voice cords.

So you are correct that the mentioned 7kHz won't suffice, even just for voice. A quick test showed that the highest noticable frequency peak is at around 12-13kHz, meaning you'd need at least 26kHz sampling rate. Give it a bit of a safety margin and we're getting pretty close to the recommended 32kHz.

However I challenge you to make the test: Get some recording that was made at 44kHz (or make it yourself) and make a 32kHz downsampled version (I can do it for you) of it, then play them without knowing which is which and try to tell the difference. I'd be impressed (and quite confused) if you could tell the difference. Use lossless format only, of course.