Hi Roel,
I won't comment on the mp3 itsef.

OMB can be as expensive or inexpensive as one chooses.
I gather most of us own a computer already or we wouldn't be here.
A midi keyboard of some sort whether it's a dedicated controller, a synthesizer, a digital piano, an arranger keyboard a kid's casio/yammi( as long as it has midi) choice is yours, you can even use the program without a keyboard if you choose.

Next soundsource, again you have the choice.
You can use synthesizers, samplers, arranger keyboards , softsynths ranging in price from $0 ( for some soundfonts) right up to Franks very elaborate studio setup.

Cost can be as little as $50 ( omb software) provided you own a p.c. up to many $1,000's

Flexibility & budget is the key.

best wishes
Rikki





[This message has been edited by rikkisbears (edited 05-07-2005).]