1/23/2024 0 Comments Turntable rumble subsonic filter![]() If it really bugs you and you only hear it between tracks, just gate or wipe the noise between tracks.Ĭlick to expand.For LPs, I use the following setting in Click Repair:Īny higher and you run the risk of altering transients. But I think what you might find out is that the noise is broader band than it seems so it'll be hard to notch filter, and the notch filtering will kind of screw up the music anyway. You can try to record some of the in-between-tracks noise, do a frequency analysis of some sort of it, try to identify the frequencies where there's the worst noise, and try to notch filter that. You can filter below 40 Hz (there's pretty much no musical information below there on most records and certainly most rock and pop records anyway), but you won't catch all the noise - neither the noise with fundamental frequencies above that, nor all the sideband frequencies of mechanical noise above that.Īnd in fact, with a vinyl rip where the noise is already recorded into the file, filtering the low frequencies may in the end have pretty limited effect on what's audible. ![]() Even the stuff that has obviously frequency centers in the subsonic range has sidebands well up into the audible range at various frequencies, motor vibration breakthrough usually starts in the audible range and has sidebands higher up. The problem with trying to filter this noise after the fact, rather than reducing it mechanically at the source, is that it's not really narrow band noise. That's really the first, best place to start reducing this noise - find a turntable with the lowest levels of motor breakthrough and better motor and motor control for lowest levels of cogging torque, use a tonearm that has fluid damping for subsonic resonances, pick a cart with a compliance that puts the mass compliance subsonic resonant point a little higher that is what is sometimes typically suggests (say closer to 15 Hz than to 8 Hz) which are less likely to be excited by vinyl surface imperfections, etc. These things can be reduced in level when motors are better isolated from tonearm mounting surfaces, and produce more or less cogging torque subsonic resonances can be more or less well controlled with damping (which can mean lower amplitudes of audible sidebands), etc. The sources are typically motor vibration breakthrough, sidebands of subsonic resonances from the mass/compliance spring system of the arm/cart combination, bearing noise, and of subsonic ringing excited by less than perfectly smooth vinyl surfaces (the record surface is not highly polished). Click to expand.That noise is mechanical noise added by the playback system and it CAN be lower with some turntables (and records) and higher with others, and there's really no easy way to remove all of it from the file after it's been recorded because it's not usually one noise at one frequency.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |