msPinky-Vinyl -POS and VEL

[marleynoe]

Hi there!



Could anybody tell me whatïs the difference between the ms Pinky -Vinyl - generations (gen1, gen2 gen3) ?



Did the records improve somehow ? Whatïs the difference for Max/MSP ?



In other words: is it worth ordering the new generations, when still using "gen1" ?



And one other question on msPinky+Max/MSP:

Whats the relation between vel. and pos. -value ?



best.

[dlpinkstah]

Could anybody tell me whatïs the difference between the ms Pinky -Vinyl - generations (gen1, gen2 gen3) ?



Did the records improve somehow ? Whatïs the difference for Max/MSP ?



In other words: is it worth ordering the new generations, when still using "gen1" ?



And one other question on msPinky+Max/MSP:

Whats the relation between vel. and pos. -value ?

All 3 generations of Ms Pinky vinyl operate on the same basic principles, but Gen3 offers significant improvements over the previous two generations of vinyl. With Gen3 you have:



1) Much improved tracking in general, especially at low turntable velocities. With Gen1 and Gen2 vinyl, you'll always notice a weird tremelo effect when you try to scratch at very low velocities-- the sound basically breaks up and goes wonky. With Gen3 vinyl this low-velocity problem has been improved significantly.



2) Each side of the Gen3 vinyl contains totally unique position information. This means that the software can discern whether you're playing the A side or the B side. With Gen1 vinyl this is not possible because both sides are exactly the same.



3) The "A" side on Gen3 vinyl is cut with visible bands spaced at 1-minute intervals so that cueing up to a particular point on a track is easier. With the previous two generations, the entire side of the record looks uniform to the naked eye so it's very difficult to correlate visually the position of the needle on the surface of the record with a point inside a digital file. With Gen3 vinyl you can glance at the surface of the record and quickly estimate how far into a track you are.



About the difference between the position and the velocity signals:



Velocity: This signal just tells you how fast the needle is moving and in what direction. If the needle is moving in the normal forward direction, the velocity signal is positive valued. If the needle is moving in reverse, the velocity signal is negative. Ms Pinky calculates a new velocity value every 64 samples so if you're sampling at 44.1 kHz, a new velocity value is calculated roughly every 1.5 milliseconds.



Position: The position signal basically correlates to the position of the needle on the surface of the Ms Pinky vinyl. Each position stamp on the surface of the record lasts 512 samples at 44.1 kHz, equivalent to about 11.6 milliseconds. There are approximately 155 totally unique physical position stamps per rotation of the record, and all position stamps on both sides of the Gen3 records are all completely different from each other. The position signal in Max/MSP is derived from decoding the position stamps on the surface of the record and can be used to trigger different things based on where the needle happens to be on the surface of the record.

[marleynoe]

Hello DjPinkstah..



Thanks very much for the answer! Concerning the POS and VEL-values I was meaning, if thereïs a mathematical function that relates one to the other....



thx in advance

[dlpinkstah]

The Position should generally be equal to the integral of Velocity over time.

This is pretty much true with the Ms Pinky vinyl position and velocity signals, though not absolutely true Due to all the noise perturbations coming from the dirty analog vinyl signal, imperfections in the velocity measurements over time yield an inexact relationship between position signal and the integral of the velocity signal. But for practical purposes they're still very useful.

[Pimptre$$]

Previous posts were interesting, what's new about the 4th generation Ms Pinky? This is what I have.

[dlpinkstah]

Generation 4 vinyl (also "Torq" vinyl) contains many significant improvements over all the previous generations. I could write a book about it Suffice it to say, if you're still using any generation prior to 4 (or Torq) you should really upgrade to the latest.