The important thing to remember is that once we record the original, then it is next to impossible to try and undo anything that we may have done.intentionally or non-intentionally.
Once we have recorded the audio, then we are free to enhance it anyway we like by using software to remove unwanted noise, using an equalizer, etc. The objective is to create a signal as close to the original audio signal as possible. this would include any form of enhancement like putting a 'tube' sound on top of the signal. Or, in going from the analog LP to the digital file that we do not want to alter the audio signal in anyway. Our initial problem is to convert analog to digital while maintaining as much of the original audio quality as possible. If we choose to use a preamp to do this then the premap may introduce audio artifacts. To get the best possible audio from your LPs then you should go directly from your turntable to your computer hard drive via a USB or Firewire device.
Converting LPs to Digital: Interface Turntable to Computer via USB