This system fulfills the promise of 72 tracks of host-based hard disk recording. You can record, edit, mix process, and master multitrack recording projects entirely inside the computer with this setup. The system consists of : 3 x MOTU 24I/O - Audio interface, with 2x PCI card (a spare) https://www.sweetwater.com/store/detail/24ioCorePCIe--motu-24i-o-core-pci-e-system/reviews 1 x Allen & Heath GL2400 24 channel mixing board - https://www.allen-heath.com/ahproducts/gl2400/ 1 x Soundcraft LX7 II 24 channel mixing board - https://www.soundcraft.com/en/products/lx7ii https://www.soundcraft.com/en/product_documents/lx7iiug-pdf Soundcraft 16 channel and 12 channel mixers 2 dbx quad compressors, dbx 32 band stereo eq, Lexicon effects, Cables, snakes, 2 small 19 inch racks, 4 patch bays, all included to produce a working system. All you need is your own PC. It is all in good working condition, except one channel of one of the quad compressors isn't compressing. I comes with an ASIO driver so it will work with virtually any DAW. Here I used it with Sonar. I'm selling it because I'm downsizing.