An analysis of turntable rumble 2005-10-01 22:02:52 The following is an analysis of the rumble response of my turntable, with a needle drop of Autechre's Untilted (a record I've been using quite often), against the FLAC version of the same album I downloaded off of Bleep. Other reports have not convinced me of the exact parameters necessary for a proper filter (and are wildly conflicting at that), so hopefully this will put some sort of bound on what to use.Analysis detailsThe reference WAV is a FLAC of the first song "LCC" purchased on Bleep, considered equivalent to the CD version. The vinyl WAV is a 24/96 recording of the very first play of the side containing LCC. Recording chain is Goldring 1012 -> Music Hall MMF-5 -> TCC TC-750 -> RME DIGI96/8 -> MAGIX Samplitude 6. The recording had no significant pops and was normalized to peak volume prior to analysis. No calibration was done to the turntable prior to recording and all antiskate/tracking force settings were at dealer defaults.Both WAVs were downsampled to 8khz with foo_ssrc in Ultra mode. Analysis was done in LabVIEW with the first 3 million samples (over 6 minutes) from each file fed into an amplitude spectrum plot. The left and right channels of both WAVs were mixed into L+R and L-R channels during analysis to better isolate the effects of vertical vs horizontal groove/cartridge distortion. The LP WAV was delayed by a fraction of a second due to the leadin groove which was not removed.