Thanks Chris, it is a great spot. Here is a description from: ausbell.com/Federation%20Bells/FEDBELLS.html

The installation is a set of musical bells like a carillon, but dispersed across a small field rather than hidden in a tower. Our primary impetus is that the bells are also sculptural forms to be seen and approached. Being able to see the different shapes and hear how they sound is fundamental to the aural/visual aesthetic of the project and the underlying concept of integrating the various traditional bell forms. Naturally the bells sound very different when you are standing in the middle of the installation to when you are 100 metres away at the edge of the park.

The installation is a public musical instrument. The bells are struck by computer controlled hammers programmed to play MIDI compositions. On a daily basis (8.00 am and 5.00 pm) sequences composed for the bells by 7 Australian composers play, allowing people to wander amongst the bells for an exhilarating experience or sit nearby and enjoy their clear and gentle musicality. While bells were once amongst the loudest sounds people would normally hear, they are now often drowned out by traffic and amplified music. These bells can usually be heard within about 100 metres in the relatively quiet riverside park. The sequencing of the bells uses standard musical software and the bell sounds can be downloaded from this site, allowing composers from anywhere in the world to write works for the bells and send them as MIDI files over the internet for performance.

It's very cool. I'm going to spend more time there one day to try and hear all the compositions

It's about 200 meters down the river heading towards Richmond Joel. Check it out. The sculpture "Angel" (the one that used to be in the NGV moat) stands there near the bells too.
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That's a damn good question Perez! I honestly don't know, but I would assume they might be enclosed bells to prevent rust (not sure how this would affect the resonance/acoustics of the bells...

I think that might be a poossibility Dan, reading the description (see above in my reply to CTD3) of how composers can send midi files via the internet to be played it would be a simple matter to interface a midi keyboard.

I'll have to check that out Konopiera (I'm sure my nephews have Myst!)

I hope one day you get the chance cnorris1!
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My pleasure janette, thank you for commenting (and making it a "like")!