Test: CD/SACD-Player dCS Puccini
r e c h te n
S e ite
u n te r g e b r a c h t,
in
d e r
M it t e b e fin d e t s ic h e in b la u e s D is p la y ,
a u f d e m T r a c k in f o r m a t io n e n a n g e z e ig t
w e r d e n u n d d a s b e im N a v ig ie r e n d u rc h
d ie r e c h t u m fa n g r e ic h e n M e n ü s b e h ilf -
lic h is t . K o n t a k t s ic h e r e , s e h r h o c h w e r -
tig e B u c h s e n b e fin d e n s ic h h in t e n a m
G e r ä t .
D e r a n a lo g e A n s c h lu s s a n E n d s t u f e n
o d e r V o r / E n d - K o m b is e r fo lg t w a h l-
w e is e p e r C i n c h o d e r X L R , d ie A u s -
g a n g s s p a n n u n g
d e s
s y m m e t r is c h e n
A u s g a n g s k a n n z w is c h e n 2 u n d 6 V o lt
v a r iie r t w e r d e n , fa lls d a s n ö tig is t . E x -
te rn e W a n d le r k ö n n e n p e r R C A - K a b e l
a n g e s c h lo s s e n w e r d e n , w o b e i h ie r n u r
e in 4 4 ,1 - k H z - S ig n a l a n lie g t, w e n n e in e
C D a b g e s p ie lt w ir d . S o llt e g e ra d e e in e
S A C D o d e r e in e e x te rn e Q u e lle m u s i-
z ie r e n , is t d ie s e r A u s g a n g s t u m m . A b e r
e h r lic h : W i e s ic h n o c h z e ig e n w ir d , is t
d ie V e r w e n d u n g e in e s e x te rn e n W a n d -
Die asymmetrischen beziehungsweise
symmetrischen Ausgänge werden
komplett getrennt versorgt
Kernstück: Der berühmte Ring-DAC von dCS wird von
einer temperaturkompensierten Clock unterstützt
le r s e h u n n ö t ig , d e n n d ie D / A - W a n d -
lu n g d e s P u c c in i ü b e r t r if ft n a h e z u a lle s ,
w a s a u f d e m d ig it a le n S e k t o r d e r z e it
u n te rw e g s is t . D a s in d s c h o n e h e r d ie
b e id e n d ig it a le n E in g ä n g e in te r e s s a n t,
d ie f ü r e x te rn e Z u s p ie le r g e d a c h t s in d ,
d ie a u c h v o n d e r Q u a lit ä t d e s R in g -
D A C s u n d d e r A u s g a n g s s t u fe n p r o fi-
tie r e n d ü r fe n . I m M e n ü is t es m ö g lic h ,
g e tr e n n t
f ü r
d ie s e
In p u t s
z w is c h e n
P C M - u n d D S D - U p s a m p lin g z u w ä h -
le n . A u c h k a n n m a n g e r n m it d ig ita le n
F i lt e r n e x p e r im e n t ie r e n , d e re n d re i m it
je w e ils
u n t e r s c h ie d lic h e m
Z e i t - u n d
U b e r s c h w in g v e r h a lt e n
s in d
w ä h lb a r .
F ü r
d ie
S A C D - W ie d e r g a b e
k ö n n e n
in s g e s a m t v ie r, n a t ü r lic h g a n z a n d e rs
a rb e ite n d e F i lt e r g e w ä h lt w e r d e n . H i e r
w ir d m it w a c h s e n d e r Z a h l d ie W i r -
k u n g
d e r
R a u s c h u n t e r d r ü c k u n g ,
d ie
m a n b e i d e r D S D - W ie d e r g a b e z w in -
g e n d a n w e n d e n m u s s , e r h ö h t . S o k a n n
m a n d e n f ü r s ic h b e s te n K o m p r o m is s
a u s v e rfü g b a re r B a n d b r e it e u n d e ffe k -
t iv e r e r U n t e r d r ü c k u n g v o n R a u s c h a n -
te ile n w ä h le n . F ü r m ic h w a r e in g u te r
K o m p r o m is s
F i lt e r N u m m e r 2 , d a s
k a n n a lle r d in g s je d e r f ü r s ic h s e lb s t
a u s p ro b ie re n .
In te rn e s
E in e
w ic h t ig e
K e r n k o m p o n e n t e
im
P u c c in i
is t
d C S ‘s
R i n g - D A C .
D e r
s te c k t in ä h n lic h e r F o r m a u c h im v o n
m ir in h ö c h s t e n T ö n e n g e lo b te n D e -
b u s s y , d e r k la n g lic h b is h e r f ü r m ic h
u n e r r e ic h t
is t .
D ie s e
W a n d le r p la t i-
n e b e s te h t a u s e in e m d is k r e t a u fg e -
b a u te n D A C , e in e C h ip - L ö s u n g w a r
h ie r
s c h lic h t
n ic h t
a u s r e ic h e n d , u m
d ie
K la n g v o r s t e llu n g e n
d e r
E n g lä n -
d e r a u c h n u r a n s a tz w e is e b e fr ie d ig e n
z u k ö n n e n . D i e L im it ie r u n g e n d ie s e r
e in fa c h e r e n L ö s u n g e n k a n n m a n a ls
F i r m a d C S
n ic h t h in n e h m e n .
H i e r
k o m m t d e r u n g la u b lic h g u te 5 - B it -
W a n d le r , d e r v o n e in e m m ä c h t ig e n ,
a u f z w e i F P G A - B a u s t e in e n la u fe n d e n
S o ft w a r e p a k e t
g e s te u e rt
w ir d .
A ll e
a n k o m m e n d e n D a t e n w e r d e n in z w e i
m ä c h t ig e n D S P - C h i p s a u f e n tw e d e r
2 .8 2 2 o d e r 3 ,0 7 M H z in 5 B i t h o c h -
g e s a m p e lt,
a b h ä n g ig
d a v o n ,
o b
d as
Q u e llm a t e r ia l e in V ie lfa c h e s v o n 4 4 .1
o d e r 4 8 k H z d a r s t e llt . I n d ie s e n C h ip s
f in d e t a u c h d a s F i lt e r n d e r d ig it a le n
D a t e n u n d d a s R e g e ln d e r d ig it a le n
L a u t s t ä r k e s ta tt. W a r u m d ie s e 5 B it ?
D a s h a t w a s m it G e n a u ig k e it z u tu n .
N o r m a le M u l t i b i t - D A C s s in d d a r a u f
a n g e w ie s e n , d a ss d ie A n f o r d e r u n g a n
d ie G e n a u ig k e it d e r v e r w e n d e t e n W i -
d e rs tä n d e in s U n e r m e s s lic h e s te ig t, s o -
b a ld w i r es m it p r a k t ik a b le n B it t ie f e n
z u t u n h a b e n . A b e tw a s m e h r a ls d e r
H ä lf t e d e r m ö g lic h e n A u f lö s u n g w ir d ’s
k r it is c h m it d e r M ö g lic h k e it , D e t a ils
a u s d e m R a u s c h e n z u fis c h e n . N o r m a le
D e lt a / S ig m a - W a n d le r (d a s G r o s d e r
v e rfü g b a re n D A C - C h i p s ) s in d s c h ö n
lin e a r u n d h a b e n d ie s e s P r o b le m n ic h t ,
v e r fü g e n je d o c h a u f d e r a n d e re n S e ite
ü b e r e in e n p r in z ip b e d in g t b e g re n z t e n
R a u s c h a b s t a n d . D e r 5 - B i t - R i n g - D A C
v e r e in t s o z u s a g e n d a s b e s te a u s b e i-
d e n P r in z ip ie n . E r h a t k e in P r o b le m
m it W id e r s t a n d s g e n a u ig k e it e n , d a d ie
W id e r s t ä n d e , d ie f ü r d ie f ü n f Z u s t ä n -
d e b e n ö tig t w e r d e n , d e n g le ic h e n W e r t
h a b e n u n d s e in R a u s c h v e r h a lt e n is t
a u fg r u n d d e r h ö h r e n „ B it i z i t ä t “ a u c h
b e s s e r a ls b e i h e r k ö m m lic h e n 1 - B it -
W a n d le r n , so d a ss d a s N o is e - S h a p in g
g e s c h m e id ig e r
a u s fa lle n
k a n n .
K e i n
W u n d e r , d a ss d C S e in P a t e n t a u f d ie se
T e c h n o lo g ie h a t .
A u f d e r a n a lo g e n A u s g a n g s s e ite g ib t ’s
ü b rig e n s g e tre n n te , d e d iz ie r te
S e k t i-
o n e n f ü r d e n s y m m e t r is c h e n b e z ie -
h u n g s w e is e
u n s y m m e t r is c h e n
A b -
s c h lu s s ,
h ie r w ir d
h a lt
n ic h t s
d e m
Z u f a ll ü b e rla s s e n u n d n ic h t m it e in e m
m in d e r w e r t ig e m O p e r a t io n s v e r s t ä r k e r
e in fa c h d e s y m m e t r ie r t .
12
