high pitch sound while accelerating, help Options

[do_0b]

Hi, my 94 gt auto is occationaly making a high pitched sound while i acclerate. it kinda sounds electronic, kinda like a rc car. it would only be while im stepping on the gas and it would go away if i let off the gas or brake. and when i come to a complete stop you would hear it again while decelerating from around 2k rpm. does anybody have any idea what this is?? any help would be greatly appreciated

[Anub1s]

When I had the aftermarket stereo in my car I found out that the antenna wasn't entirely grounding, so when I had it on the radio, it would make that high pitched sound while accelerating but only on certain stations in certain places...it was really wierd, then I put the stocker back in and it was all fine.