You will see green rings appear in the scope view, as shown above. For optimal performance the inner ring should be as close to circular as possible. Use the scope zoom slider to zoom in or out as necessary. The number in the top left corner of the scope view gives the current absolute position within the control record or CD. The number in the top right corner is the current speed in RPM. For further information, please read this article on Diagnosing the Scope Views.
After calibration, the number in the upper right corner of the scope view should say 0. If that number is fluctuating then manually move the estimate slider to the right until that number is stable at 0. If you are still experiencing issues, you might have to adjust the placement of your setup.
Conversely in the bass, as frequency decreased, recording amplitude increased. Otherwise, bass modulation became excessive and overcutting took place, with the cutter getting into the next record groove. When played back electrically with a magnetic pickup having a smooth response in the bass region, a complementary boost in amplitude at the bass turnover point was necessary. Miller in reported that when complementary boost at the turnover point was used in radio broadcasts of records, the reproduction was more realistic and many of the musical instruments stood out in their true form.
West in and later P. Voight showed that the early Wente-style condenser microphones contributed to a 4- to 6-dB midrange brilliance or pre-emphasis in the recording chain. This meant that the electrical recording characteristics of Western Electric licensees such as Columbia Records and Victor Talking Machine Company had a higher amplitude in the midrange region.
Brilliance such as this compensated for dullness in many early magnetic pickups having drooping midrange and treble response. Over the years, a variety of record equalization practices emerged, with no industry standard. The purpose was to record higher modulation levels on the record. Evidence from the early technical literature concerning electrical recording suggests that serious efforts to standardize recording characteristics within an industry did not occur until — Before this time, electrical recording technology from company to company was considered a proprietary art all the way back to the Western Electric licensed method first used by Columbia and Victor.
Broadcasters were faced with having to adapt daily to the varied recording characteristics of many sources - various makers of "home recordings" readily available to the public, European recordings, lateral cut transcriptions, and vertical cut transcriptions.
The NAB, among other items, issued recording standards in and for laterally and vertically cut records, principally transcriptions. A number of 78 rpm record producers, as well as early LP makers, also cut their records to the NAB lateral standard. When the record was played back using a complementary inverse curve de-emphasis , signal-to-noise ratio was improved and the programming sounded more lifelike. In a related area, around treble pre-emphasis similar to that used in the NBC Orthacoustic recording curve was first employed by Edwin Howard Armstrong in his system of frequency modulation FM radio broadcasting.
FM radio receivers using Armstrong circuits and treble de-emphasis would render high-quality, wide-range audio output with low noise levels. The authors disclosed electrical network characteristics for the Columbia LP curve. Nevertheless, the curve was not yet based on mathematical formulae, at least not explicitly. If records were engineered to sound good on hi-fi amplifiers using the AES curve, this would be a worthy goal towards standardization.
This curve was defined by the transition frequencies of audio filters and had a pole at 2. Besides also being a battle of disc size and record speed, there was a technical difference in the recording characteristics. Ultimately, the New Orthophonic curve was disclosed in a publication by R.
Moyer of RCA Victor in ;  additional background information about this evolution can also be found in another article of the same author, published in It eventually became the technical predecessor to the RIAA curve. Between and before the stereo LP in , several standards bodies around the world adopted the same playback curve—identical to the RCA Victor New Orthophonic curve—which became standard throughout the national and international record markets.
Read the petition. EPA sent a letter of receipt to the petitioners on December 20, Fluoride Chemicals in Drinking Water. Read the version of the petition with a non-substantive addition.
EPA sent a letter of receipt to the petitioners on December 19, After careful consideration, EPA denied the petition on February 17, After careful consideration, EPA denied the petition on December 31, Viviani, Ph. After careful consideration, EPA denied the petition on September 25, EPA sent a letter of receipt to the petitioners on July 15, EPA will issue its response to the petition on or before September 21, After careful consideration, EPA denied the petition on September 21, On February 26, , EPA received an adverse comment pertaining to the addition of the six chemical substances to the list; therefore, in accordance with the procedures specified in the direct final rule, EPA withdrew the rule.
EPA intends to publish a notice proposing to add these six chemical substances to the list of chemical substances that are partially exempt from reporting processing and use information under the CDR rule. The petitioner also filed a separate petition, under 40 CFR EPA determined that, based on the totality of information on the chemical substances, the Agency has low current interest in the CDR processing and use information for these six chemicals and published a direct final rule to amend the list of chemicals at 40 CFR Because an additional decision to place these six chemical substances on the list at 40 CFR After careful consideration, EPA denied the petitioner's request to initiate a TSCA section 6 rulemaking, because the TSCA section 21 petition does not specify what risk management action it is requesting; set forth sufficient facts to establish that the disposal of PVC, vinyl chloride, or phthalates used as plasticizers presents or will present an unreasonable risk; or explain why action under TSCA would be preferable to action under other statutory authorities.
EPA also denied the petitioner's request to initiate a TSCA section 4 rulemaking to require further toxicity testing of PVC, vinyl chloride, or phthalates used as plasticizers, because the TSCA section 21 petition does not set forth sufficient facts for EPA to find that the toxicity information available to the Agency is insufficient to permit a reasoned evaluation of the health or environmental effects of these PVC constituents, or for EPA to conclude that toxicity testing is necessary to develop any missing data.
After careful consideration, EPA found that the petition did not demonstrate that a TSCA section 8 d reporting rule is necessary and that, while the records requested by the petitioners are potentially useful, they are not necessary to carry out the purposes of TSCA or to support the rulemaking analysis. William Hirzy, Ph. On August 6, , EPA notified the petitioners that after careful consideration, the Agency denied the TSCA section 21 petition because the evidence presented by the petitioners does not adequately support a conclusion that HFSA, when used as a fluoridation agent, presents or will present an unreasonable risk to health or the environment and that a TSCA section 6 rulemaking is necessary to protect adequately against such risk.
Lead in Shot and Bullets April 9, -- On March 13, , EPA received a petition from the Center for Biological Diversity and a number of other groups requesting that EPA take action to regulate bullets and shot containing lead for use in hunting and shooting sports.
In August , EPA denied a similar request on lead bullets and shot after concluding that the Agency does not have the legal authority to regulate this type of product under TSCA. See the Agency's response. After careful consideration, EPA found that the petition did not demonstrate federal action is necessary, based in part on the fact that in many of the places where lead exposure among birds may be a problem, states have taken action to regulate the use of fishing tackle containing lead or initiated programs to reduce its use.
In A Hurry - Gareth Walters - Harmonica (Vinyl, LP), No Such Animal (1a Parte) - Jimi Hendrix - No Such Animal (Vinyl), Otan Simenoun I Kambanes (When The Bells Sound) - Mikis Theodorakis - Zorba (CD, Album), Have A Cigar - Various - Music From And Inspired By M:I-2 (CD), Canzonetta (Andante) - Isaac Stern / The Philadelphia Orchestra - Tchaikovsky: Violin Concerto In D, Sweet Funky Thing - Various - Soul Sauce (CD), (You Will) Set The World On Fire - David Bowie - The Next Day (Vinyl, LP, Album, Album), Just Like Me - Various - Ídolos da Juventude (Vinyl, LP), Επιστροφή Στο Χάνδακα - Δημήτρης Πλαζομίτης - Θεοφάνης (CD, Album), Break My Heart (You Really) - Shakespears Sister - Break My Heart (You Really) (Vinyl) The Hustle - Common - Electric Circus (CD, Album)