During my studies at university, we didn't go too in depth about Signal to Noise ratios (SNR) and Total Harmonic Distortions (THD). I've been trying to work with audio codecs for some time and I only now just wondered if there was anything I could do to improve the signal quality external to the audio codec.
Specifically I'm working with the SSM2604 from Analog Devices which states it has:
So I'm curious, is there anything I can do, apart from high pass and low pass filters, to the incoming signal that may improve these values?
Also how would these values change if I am using the codec at a higher sampling frequency? I expect that the sound quality would degrade somewhat but I'm quite ignorant in this area of EE.