8. All members that put forth a statement concerning subjective sound quality, must -- to the best of their ability -- provide objective support for their claims. Acceptable means of support are double blind listening tests (ABX or ABC/HR) demonstrating that the member can discern a difference perceptually, together with a test sample to allow others to reproduce their findings. Graphs, non-blind listening tests, waveform difference comparisons, and so on, are not acceptable means of providing support.
Can someone help me out, identify something to check that might be causing this problem? Is there any way to confirm the clipping in the source, resulting WAV, or resulting MP3?
Look at the waveforms in Audacity, and use the built-in clipping detector to identify clipping samples. This will show you if the ripped lossless files or the decoded LAME files show any signs of clipping.