There are no stupid questions, only stupid answers :-)
DAC (abbreviation for "Dog 'n' Cat") is a bootleg label.
When you go here: [
iorr.org] , you will see the list of bootlegs they published. Some of these are recordings made by people in the audience and a few are "soundboards" (labeled "Soundboard,"SB" or "SBN", or...).
Normally, you will get a soundboard (superior sound quality to an "audience tape"), when someone has been able to plug into to mixing desc or intercepted the IEM signal (IEM: In Ear Microphones) that is send to to the different band members, so they can stay in tune. Some venues also provide a sound signal to people with hearing problems; the have some sort of headphone, so they can hear the sound better. This signal can also be intercepted if you have the frequency that's used for this.
Some recordings are superb, others are in poor quality; it all depends on the original recording. If there's only a bad audience recording available of a certain show, they will try to work on it, but mostly the result isn't much better, LOL!
As for the track titles, description and so on; it all depends on the way someone rips his originals. A lot of people will just use a program that rips the CD and produces only numbered tracks. When people have (or take) the time, they can then put in the correct track title, but that's sometimes a lot of work, so very often it's not done.
When you download a recording and it only has track numbers, you can rename the tracks yourself by using the provided artwork. (if there's no artwork available, you can try to google it, or just listen to the tracks one by one and then rename them if you recognize the song)
Important; when you burn a concert to CD, use the DAO (disc at once) option, otherwise you will have a 1 or 2 second gap between tracks.
A download with track numbers or full track name will normally be the same, as long as the CD is ripped to a lossless format like wav or flac. When it's ripped to a lossy format, like mp3, the quality will be less (depending on the sample rate used, it can even be poor)
Hope this helps you some, I'm sure other long time members will give more info (or correct me if I made some mistake in this post)
Chris from Belgium