Direct Drive vs. Idler Drive vs. Belt drive


I'd like to know your thoughts on the strengths and weaknesses of each drive system. I can see that direct drive is more in vogue over the last few years but is it superior to the other drive systems? I've had first-hand experiences with two out of the three drive systems but looking to learn more.
128x128scar972
Hi @mijostyn ,

I see, you never heard EMT like 99% people on this forum.
My friend a musician soloist flute player, conservatorium teacher and audiophile had Sota Cosmos, Thorens 124, modified Lenco 75.
When he heard at his friend home EMT 950 he was so excited that he took a loan to buy EMT 950. And when he received and listened EMT 950 at his home he hastened to rid of his Sota.
Why you need a Shevy when you have a BWM?

Regards,
Alex
Mike, hi. I thought it was a little instructive that on WBF you didn't mention much in yr comparison to existing NVS of yr new CSPort and Saskia. Now I'm reading you have some strong opinions on potential negatives of servo and use of such on NVS.
So, you're getting greater satisfaction, immersion, from yr non-servo thread- and idler-drives?
That's not to say the NVS isn't first rate. Just that it's not as fully fleshed out as the Saskia, and not quite as ethereal as the CSPort?
Or am I as usual reading too much into yr words?

Marc, i got into it here on Audiogon first since the thread topic matched my current investigations to a 'T'. i've certainly suggested these conclusions on WBF too, as has Mik. but for whatever reason the dialogue did not continue there as it has here, which caused me to go deeper into it here.

recently i've been listening to much more vinyl, and really focusing on the drive differences. i've also been comparing EMAI SUT's which has focused me on turntable differences. so these ideas are fresh with me and there are lots of hours of listening behind them so my feelings are very strong and clear. 

the NVS has its own unique qualities and continues to be a strong performer and supreme at certain things. but most jazz and classical i prefer the lack of a servo clearly. the CS Port and Saskia are really amazing turntables, the CS Port does things i've never heard done before anywhere. but no one knows about it so it does not resonate with people.
@richardkrebs 
 What, to me, is important is the speed accuracy at a micro level.
Can you comment on your statement above, if the drive is capable of micro speed stability would it not be able to maintain its 
speed or for that matter a stationary dot on a wall over a 1.8 sec
period? 
@totem395 
Yes it goes without saying that the drive can manage an apparently stationary dot over 1.8 seconds. I was referring to a longer time frame, say a complete side of an LP. To me it doesn't really matter if the dot has drifted a little after 20 or so minutes. 
We are referring to speed drift. Quite a different metric than W@F and short term speed stability. 

In a DD, this drift is related to temperature and the accuracy of the speed reference.  A quartz crystal or another form of precision oscillator.
Speed drift on my design is < +- 0.0025%


  
Can you comment on your statement above, if the drive is capable of micro speed stability would it not be able to maintain its
speed or for that matter a stationary dot on a wall over a 1.8 sec
period?

the speed almost does not matter within a range. our ears and brains are dramatically more sensitive to steadyness of pitch than the actual pitch. and our reality check with our senses is any sort of grain or warbling in a decay or sustain is immediately sensed as a non-linearity......not real.

so the idea of accuracy is going down the wrong path. we want steady.......and we want continuous.

are there people with perfect pitch. maybe, but not many. and different pitches typically don't sound 'wrong'. OTOH everyone can hear when a piano or horn sounds sour and it's a bummer.

there is more to music than these concepts;; but when done right this is very big.