Journal Forum

Synthetic Reverberator - January 1960

Sound Board: High-Resolution Audio - October 2015

Synchronized Swept-Sine: Theory, Application, and Implementation - October 2015

Access Journal Forum

AES E-Library

Four-Channel Phonograph Bi-Radial Point Playback Criteria

Document Thumbnail

For accurate and wear free record player for CD-4 (discrete 4-channel) reproduction, true Bi-Radial point dimensions must be accurately maintained, such that the long radium shall be 3x10-3 inches and the short radium shall be 2x10-4 inches. Tracking, tracing, record bearing load and apparent record bearing surface stiffness establish those values critically. Scanning Electron microscope photos show actual radii of points in use. Frequency response curves show the need to maintain these radii to give acceptable performance at the innermost groove.

AES Convention: Paper Number:
Publication Date:

Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $33 for non-members, $5 for AES members and is free for E-Library subscribers.

Learn more about the AES E-Library

E-Library Location:

Start a discussion about this paper!

Facebook   Twitter   LinkedIn   Google+   YouTube   RSS News Feeds  
AES - Audio Engineering Society