Originally Sonic Foundry Acid Drum Tools. Many loops, can be used for TV or Radio ads or other projects. There are 4/4 loops 6/8 loops. shuffles, blues. Full kit loops, for each category and One shot sound samples. Laidback and many miscellaneous loops. The problem is that there is reverb on many loops and each reverb is a bit different in settings. So when you mix and match loops it becomes difficult to see if all are the same type. Also the loops within directories are not arranged in a very friendly manner. Nevertheless, there are good loops for rock, shuffle, and limited blues. Other miscellaneous samples from other discs are included too. Overall 5. Sound is good. These loops should be about 20 to 30 dollars max.