The trick to getting better sound is to identify the weakest links in the recording chain and figure out how to best upgrade them. upgradeable weak links could be any or all of the below:
- the singer
- the skill of the engineer, both at recording technique and "production" technique (i.e. how to get the best performance out of a particular singer - a skill which should not be overlooked).
- the acoustics of the recording space
- the microphone
- the microphone preamp
- the compressor
- the cables and connecters
- the recording device (including converters if applicable)
- mixing techniques (including use of effects, EQ, more compression, and other processing; as well as the ability to create "space" for the vocals in the mix).
It would be impossible to single out any one of the above as the definitive "answer" to getting a better vocal track than your competition down the street. but at least you have a list of possibilities to consider.
meanwhile, go ahead and fill in the blanks that recorderman asked for. it's never bad advice to follow RM's suggestions!