AES Standards provides a rare opportunity to calibrate playback equipment for 78 rpm coarse-groove records
Recognising an international need for calibration tools, the AES Standards Working Group on Transfer Technologies (SC-03-02) initiated a project to calibration playback equipment for coarse-groove 78 rpm records. The result is now available as a boxed set of two identical 12-inch vinyl discs, catalogue number AES-S001-064. The two discs allow one to be used as a day-to-day working tool while the other may be stored as a master reference.
This calibration disc set is important because:
SIDE A: Gliding tone, 20 Hz to 20 kHz Speed: 77,92 rpm Lateral (mono) coarse groove Time constants; 3180/450/0 ms Separate outer & inner bands: 1 kHz trigger tone Gliding tone, 20 Hz to 20 kHz 1 kHz reference level* *20 mm Light Band Width (LBW); approx 8 cm/s peak-to-peak, 5,7 cm/s rms |
SIDE B: Single tones,18 kHz to 30 Hz Speed: 77,92 rpm Lateral (mono) coarse groove Time constants: 3180/450/50 ms (Pressed under license from EMI Records Ltd.) |
Further details on the content, origins, and use of this Calibration Disc Set may be found on the AES Standards Web site.
This is a limited pressing of 500 sets in highest-purity vinyl. When this batch has gone, we hope to be able to order a second pressing. Because the supply of suitable vinyl material, and the availability of coarse-groove pressing, to achieve reference quality is becoming scarce, we cannot guarantee that these discs will be available in the future. If coarse-groove records are important to you, you should act now.
IMPORTANT: This is a vinyl pressing and is not for use with mechanical reproducers or earlier electrical pickups using steel styli. Use a lightweight pickup only.