Jump to content
The Klipsch Audio Community
artto

Vinyl LP - What's Wrong With This Picture?

Recommended Posts

Not in the groove correctly...

Share this post


Link to post
Share on other sites

Upps....:rolleyes:

 

 

  • Like 1
  • Thanks 3

Share this post


Link to post
Share on other sites

The issue I see is that it relies on physical movement to generate an electrical signal... where the information resides. 

Share this post


Link to post
Share on other sites

I seem to recall from my understanding of stereo playback of the vinyl medium that it is labelled incorrectly.  My understanding is that one side of the groove is based on the addition of the left + right channel (L+R) and the other side is based on the subtraction of the right channel from the left (L-R).  

Share this post


Link to post
Share on other sites
On 9/21/2020 at 7:03 PM, BadChile said:

I seem to recall from my understanding of stereo playback of the vinyl medium that it is labelled incorrectly.  My understanding is that one side of the groove is based on the addition of the left + right channel (L+R) and the other side is based on the subtraction of the right channel from the left (L-R).  

 

BING!!

 

Quite honestly, I'm surprised it took so long for someone to answer this correctly, especially since there are so many vinyl enthusiasts around here. 

 

And to take this one step further, there is also a vertical component - for both L & R channels. The stylus has to track up & down as well as scanning the L & R walls of the groove in order to achieve the L+R/L-R component.

Share this post


Link to post
Share on other sites

Um, that's not how I read the RIAA specification, http://www.aardvarkmastering.com/riaa.htm (emphasis added):

 

1. The stereophonic groove shall contain two channels of information recorded as orthogonal modulations of a single groove.
2. The 45 degree-45 degree system is the standard. In this system the two mutually perpendicular axes of modulation shall be symmetrically disposed with respect to a normal to the disc surface.
3. The right hand information channel, as viewed by the listener, shall appear as modulation of the out side wall of the groove.
4. When equal in-phase signals are recorded in the two channels they shall result in lateral modulation of the stereophonic groove shall produce equal in-phase acoustical signals.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...