Free musical instrument software for windows

This was what I was trying to make when I made OpenGL Mistake No.2... Its a very simplistic attempt to create a visual equivalent to a musical instrument (and isnt necessarily successful).
Basically, this is a little project that evolved out of my PhD research - where Im trying to create a musical instrument where the sound output is intimately connected to visual output.
In doing this, I had the thought of creating a visual equivalent to a musical instrument - i.e. something that creates an abstract visual output in the same way that (traditional) musical instruments create abstract audio output (meaning the sound/visual doesnt automatically make you think: "thats a picture of a building" or "thats the sound of a car").
Anyway, it doesnt do much - its just a wee test program, but I think its pretty cool, and I think theres a lot of further exploration possible in terms of creating interactive, realtime visual instruments.

Manufacture a band and guide them to success in this music simulation game. You choose the members of the bands, the style of the band, their clothing and their practicing schedule, as well as organising gigs and marketing.
You compete against other bands and solo artists who are all trying to become successful. You must improve the bands reputation while making sure you keep up their morale and dont waste all their money as you try to become a successful musical manager.

Pyro Musical Fireworks Center is the primary application for the synchronization of pyromusical shows.
This control software enables the user to carry out two tasks: on the one hand, the selection of sound tracks through the reproduction of music files in WAV, MP3 or OGG format (which can be digitalized or downloaded from the Internet); on the other hand, the digitalization of sound tracks from CD-ROMS, which broadens the range of possibilities at the time of choosing the most appropriate song.
The design of the show is easily made: a sound graphic spectrum is visualized, and the different firework devices are simply dragged and then released with the mouse.
One special feature of our PMFC is that it minimizes control wiring in the fire zone, since the connection board and the connection cables are only exposed to one another. No additional feeding or control cables need to be installed: the main interface can feed the 144 channels by itself.
Another important aspect of the system is that the connection board doesn?t have active elements or internal circuits that could be damaged by use, humidity or low temperatures, thus increasing the reliance and minimizing the failure margin of the system.
PMFC is designed to achieve high resolution in terms of temporization and shooting speed. It features a time control system operated by the PC which allows for a 5mS-precision and a maximum 25mS-delay between cues. This is important in Pyro-Musical systems, where firing precision and resolution are fundamental.

Jayzen Acoustic Bass Sample Instrument Soundfont is a free sample Instrument Library for software and hardware samplers in Soundfont format. Includes patch list and MIDI file of the online demo. Sample Instrument Libraries in Soundfont, Vsampler, GigaStudio, and Wav audio formats.