Laurie, Thanks for your prompt and helpful reply. I'd heard of Creative but had been warned off them as not too reliable. I've been trying to obtain M Audio but they seem unobtainableher in Australia. I've read quite a lot about Soundfonts and am keen to use them but apparently one needs a sound card to load them . As you say the provided noises ( I really can't call them much else) are very nasty. I hope you'll forgive my ineptitude but at 85 I'm what you might call a slow learner at the computer.
Could someone suggest a suitable sound card in order to obtain better instrumental sounds.I rely on my computer generated sounds at present and am blinded by technicalities when I search the internet sites.