Here's the upload for Sound Voltex Booth.
The link contains the HDD and Spicetools.
The version of Spicetools in the link is old but works fine.
Place the 32bit version of Spicetools in the root (where soundvoltex.dll is). Next, open Command Prompt (hold Shift while right clicking and select "Open command window here") and type the command: spice -ea
If you want to run the game in window mode, add -w at the end of the command.
If you use a private server, drop the -ea from the command.
Run spicecfg.exe to set the keys.
Notes:
*The game runs in portrait mode. If you want to run the game in landscape position, use window mode (add -w at the command prompt)
*I don't have any mods for unlocking extra songs but I don't know if there are extra hidden songs to begin with. If there actually are extra songs and you know how to unlock them, please share the method in the comment.
Link:
https://mega.nz/#F!dBdQGaya!o1caHqz6NaocsbxzMQVMSQ
Enjoy!