My goals were to evaluate three areas: System Noise, Gain, and Record Noise (groove distortion, clicks, pops) using different samples of music for the Gain evaluation (Pearl Jam) and Record noise (Local Natives). Should I zoom in on it, out? I used the waveform data to measure the gain of each pop for comparison and recorded that, however apart from subjective listening, I didn't know what more objective data, from the tools I have, could be obtained from the handling of pops by each preamp. However, at looking the pops on the spectrogram, I needed some input on what, if anything can be obtained from the spectral data. One of my favorite LP's (for which this sample was taken) I discovered had somehow gotten a scratch on it and while bad for listening was good for testing pops. 30db difference when the samples were taken? I'd say some, but I don't know to what extent. I know from comparing the two spectrogram for each channel for each preamp, there is, what appears to me, noticeably more background noise on the PREII and at a higher db vs the MM-6. I was exploring if that could be demonstrated in spectral data as well. For this particular analysis I was exploring: Does one preamp handle record noise better? What frequency range does inherent record noise live at? We know from the review of the PREII by it had low headroom (22mv input) before clipping. Sorry dc, I was inquiring what *could* be gleaned from a spectrogram and how to properly interpret what is shown.
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