CDA - noi metode de matritare-fabricare discuri
Posted: 13 May 2009, 15:51
HQCD (HiQualityCD) format achieves high quality audio through the use of a polycarbonate plastic with improved transparency derived from LCD display manufacturing technologies enabling more accurate reading of the CD data. In addition, a special alloy is used as the material of the reflective layer instead of the standard aluminum. HQCD format CDs are fully compatible with standard CD players.
SHM-CD = The high quality SHM-CD (Super High Material CD) format features enhanced audio quality through the use of a special polycarbonate plastic. Using a process developed by JVC and Universal Music Japan discovered through the joint companies' research into LCD display manufacturing, SHM-CDs feature improved transparency on the data side of the disc, allowing for more accurate reading of CD data by the CD player laser head. SHM-CD format CDs are fully compatible with standard CD players.
Blu-spec CD format boasts a new approach to the faithful reproduction of music by utilizing the leading edge blue laser diode technologies optimized for the manufacturing of Blu-ray. During the manufacturing of CD, laser beam is pinpointed to encode data on the microscopic tracks molded on the polycarbonate plastic constituting the surface of the disc.
Compared to the conventional laser beam used for the manufacturing of standard CD, the blue laser beam used for the manufacturing of Blu-spec CD has a shorter wavelength, allowing more accurate encoding of the data. The use of the laser also eliminates the need to use cooling fans that cause vibrations. Furthermore, polycarbonate plastic optimized for Blu-ray is used to ensure accurate reading of the data. Amazingly and importantly, Blu-spec CD format is fully compatible with standard CD players.
Cele 3 de sus sunt noile variante de fabricare a unui CD audio de calitate audiofila.
Sambata am avut ocazia sa ascult si sa compar pe un sistem de referinta high-end (aprox. 100K euro) bazat pe Accuphase cap de serie (sursa Accuphase 800+801) + incinte Magellan, toate cele trei formate, in majoritate discuri cumparate direct din Japonia. In general jazz si clasica, case japoneze.
Concluzie personala, clasament:
1. pe primul loc, cel mai mult mi-a placut Blu-spec CD fabricat de SONY. O curatenie si o transparenta superbe. Nivel distorsiuni extrem de redus pentru un CD audio!
2. aproape la egalitate, in anumite cazuri poate cel mai bun a fost SHM-CD de care se pare ca se ocupa JVC, creatorii XRCD. Un sunet extrem de analog pentru un CD audio. Deci adjectivul principal este ANALOGIC, sunet cald, natural.
3. HQCD - un CD demo care trebuia sa arate minunea, nu mi-a placut deloc. Un sunet perfect....de mort! Undeva gasesc asemanare in stilul casei LINN, perfectiunea sintetica a sunetului. Insa alt disc mi-a placut dar totusi HQCD s-au aflat sub primele doua de sus.
De precizat - formatele astea (defapt nu sunt formate ci metode de fabricare/master) nu sunt totul, conteaza decisiv calitatea muzicii, modul cum a fost masterizata original. Acestea nu sunt decat suporturi mai bune (teoretic) pentru master. Asa ca la comparatie castiga defapt discurile cu cel mai bun material muzical din punct de vedere al inregistrarii originale, diferentele fiind enorme in acest sens!
Asa ca daca ma gandesc bine, posibil ca toate cele trei "forme" sa fie la fel de bune, conteaza ceea ce e pe ele si cum e pus!
Apoi am pus si niste XRCD....iar intr-un final am concluzionat ca XRCD-ul le cam bate pe toate......
Mie unul mi-a placut mult Blu-spec CD de la SONY. Insa depindea si de piesele inregistrate, nu toate erau bune (clasica, jazz si rock). Intrevad potential serios astuia daca se tin de el !
SHM-CD = The high quality SHM-CD (Super High Material CD) format features enhanced audio quality through the use of a special polycarbonate plastic. Using a process developed by JVC and Universal Music Japan discovered through the joint companies' research into LCD display manufacturing, SHM-CDs feature improved transparency on the data side of the disc, allowing for more accurate reading of CD data by the CD player laser head. SHM-CD format CDs are fully compatible with standard CD players.
Blu-spec CD format boasts a new approach to the faithful reproduction of music by utilizing the leading edge blue laser diode technologies optimized for the manufacturing of Blu-ray. During the manufacturing of CD, laser beam is pinpointed to encode data on the microscopic tracks molded on the polycarbonate plastic constituting the surface of the disc.
Compared to the conventional laser beam used for the manufacturing of standard CD, the blue laser beam used for the manufacturing of Blu-spec CD has a shorter wavelength, allowing more accurate encoding of the data. The use of the laser also eliminates the need to use cooling fans that cause vibrations. Furthermore, polycarbonate plastic optimized for Blu-ray is used to ensure accurate reading of the data. Amazingly and importantly, Blu-spec CD format is fully compatible with standard CD players.
Cele 3 de sus sunt noile variante de fabricare a unui CD audio de calitate audiofila.
Sambata am avut ocazia sa ascult si sa compar pe un sistem de referinta high-end (aprox. 100K euro) bazat pe Accuphase cap de serie (sursa Accuphase 800+801) + incinte Magellan, toate cele trei formate, in majoritate discuri cumparate direct din Japonia. In general jazz si clasica, case japoneze.
Concluzie personala, clasament:
1. pe primul loc, cel mai mult mi-a placut Blu-spec CD fabricat de SONY. O curatenie si o transparenta superbe. Nivel distorsiuni extrem de redus pentru un CD audio!
2. aproape la egalitate, in anumite cazuri poate cel mai bun a fost SHM-CD de care se pare ca se ocupa JVC, creatorii XRCD. Un sunet extrem de analog pentru un CD audio. Deci adjectivul principal este ANALOGIC, sunet cald, natural.
3. HQCD - un CD demo care trebuia sa arate minunea, nu mi-a placut deloc. Un sunet perfect....de mort! Undeva gasesc asemanare in stilul casei LINN, perfectiunea sintetica a sunetului. Insa alt disc mi-a placut dar totusi HQCD s-au aflat sub primele doua de sus.
De precizat - formatele astea (defapt nu sunt formate ci metode de fabricare/master) nu sunt totul, conteaza decisiv calitatea muzicii, modul cum a fost masterizata original. Acestea nu sunt decat suporturi mai bune (teoretic) pentru master. Asa ca la comparatie castiga defapt discurile cu cel mai bun material muzical din punct de vedere al inregistrarii originale, diferentele fiind enorme in acest sens!
Asa ca daca ma gandesc bine, posibil ca toate cele trei "forme" sa fie la fel de bune, conteaza ceea ce e pe ele si cum e pus!
Apoi am pus si niste XRCD....iar intr-un final am concluzionat ca XRCD-ul le cam bate pe toate......
Mie unul mi-a placut mult Blu-spec CD de la SONY. Insa depindea si de piesele inregistrate, nu toate erau bune (clasica, jazz si rock). Intrevad potential serios astuia daca se tin de el !