Sample-editor with Delphi 1.0. Some questions

I want to write a sample-editor in Delphi. Does anybody know how to handle
the WAV-file?
Does it make sense to save the wav-file to hd and playing from hd ?
Or is it possible to load the WAV-File into memory ? But how ?
I can use the GetMem-Function, but there is only 64kbyte availible ?
Is there another mem-function or what should i do ?

Many questions I know. Thanx for answering.