● This is a rare item, the last and highest-end DAW software developed and sold under the YAMAHA name, and is not often found in the used market. ● CD reading confirmed / Installation serial number and instruction manual are included. ● This is an upper-compatible software of XGworks4.0 and XGworksST. While maintaining the same light operation as XGworks, it has enhanced AUDIO editing capabilities, and is a highly complete software that is very useful even now, when the latest DAW software are lined up. ● A valuable editor that can control the YAMAHA MU sound source series and PLG boards is standard equipment, so I think it is highly useful for those who want to make full use of those hardware. ● The AUDIO operation section is easy to understand, and it is different from the bloated DAW software of today. ● The score editor is well-equipped, so it is also suitable for those who mainly use score input and output. ● XGworks ST is a feature-limited version of SOL2, so you need this software to use all the features. ● The major difference from SOL (1) is that it is equipped with a VST host function, which allows you to use not only the software synthesizers in the package, but also countless commercial and free VST instruments and VST effects (up to 24bit / 96kHz, excluding VST3) available. ● The recommended OS from the manufacturer is up to Windows Xp, so to use it on 64bit OS such as Windows 10 or 11, you may need some knowledge of computers, such as how to install it in compatibility mode in the OS (I was able to install it on my Windows 11 computer without any problems and use it normally). Please refer to the search results for "How to use YAMAHA SOL2 on Windows 10" for more information. The SOL2 updater is still distributed on the manufacturer's official website, so I think it would be a good idea to use it as well. If possible, if you have a Windows Xp or Windows 7 (both 32bit versions) computer equipped with an RS232 terminal, you can also use hardware sound sources prior to MU128, which will further increase convenience. ● Please understand that I cannot provide a complete warranty as this is a personal sale.