Hi. Sorrry to revive such an old thread but I have similar problem. When playing C&C 1.06c the sound of money "clicking" (either increasing or decreasing) is somewhat buggy. Sometimes it can be heard, sometimes not. Often it doesn't work. I tried DOS version and everything works fine.
I don't know if it's hardware related but I tried the game on two different machines (Win XP and Win 7) and it always behaved like that. Is there any fix? Thanks.