Dear @sunnyjim : My response is: none.
As a fact exist no one AS mechanism that's accurate. It's i9mposible to have it in a totally mechanical imperfect medium with a pivoted tonearm.
Any one of us can say that we hear/listen better quality perfomance level with out any kind of AS or with AS at maximum or minimum but in all cases we are far away from true.
We need always AS ( if we use it or not is a different matters. ) problem is that what we can choose to do it is non-accurate including what @almarg posted and I refer to him with all respect.
Subject is very complex because we have to deal: with different recorded velocities at each LP and on each LP those recorded velocities changed at random at different place/distance in the overall LP recorded surface, we have way different compliance cartridges and this means not that we have low/medium/high compliance but different cartridge compliance figures over the whole compliance range that exist in all cartridges!, cartridges has different stylus shape tips and different level of quality of those stilus tips because some one are better polished than others and all of these has an influence of the AS needs ( I remember that in one of my AT tonearms were 3 alternatives of AS depending of the stylus shape. ), off-center LPs ( all LPs. ) needs different AS, even the warps in LPs ask for different AS because at each single warp VTF change, exist tonearms that use damping oil like many unipivots or the SME or Triplanar or Townshend, etc, etc.
AS level is affected with each of those non predictable changes/parameters and some others.
So, an accurate universal perfect AS mechanism is non-existent yet.
Regards and enjoy the music,
R.
As a fact exist no one AS mechanism that's accurate. It's i9mposible to have it in a totally mechanical imperfect medium with a pivoted tonearm.
Any one of us can say that we hear/listen better quality perfomance level with out any kind of AS or with AS at maximum or minimum but in all cases we are far away from true.
We need always AS ( if we use it or not is a different matters. ) problem is that what we can choose to do it is non-accurate including what @almarg posted and I refer to him with all respect.
Subject is very complex because we have to deal: with different recorded velocities at each LP and on each LP those recorded velocities changed at random at different place/distance in the overall LP recorded surface, we have way different compliance cartridges and this means not that we have low/medium/high compliance but different cartridge compliance figures over the whole compliance range that exist in all cartridges!, cartridges has different stylus shape tips and different level of quality of those stilus tips because some one are better polished than others and all of these has an influence of the AS needs ( I remember that in one of my AT tonearms were 3 alternatives of AS depending of the stylus shape. ), off-center LPs ( all LPs. ) needs different AS, even the warps in LPs ask for different AS because at each single warp VTF change, exist tonearms that use damping oil like many unipivots or the SME or Triplanar or Townshend, etc, etc.
AS level is affected with each of those non predictable changes/parameters and some others.
So, an accurate universal perfect AS mechanism is non-existent yet.
Regards and enjoy the music,
R.