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SonIc SupERioRiTy
3
THE BRYSTON SOLUTION
Bryston delivers superb sonic performance by re-sampling
and re-clocking the digital input in order to reduce jitter. The
result, a significant reduction in jitter (1/1000 of a nanosecond).
But it isn’t enough to just get the bits right; those bits have to
be converted back into music with the same timing reference
as when the music was first digitized. The input signal of the
BDA-1 is re-clocked and re-sampled to reduce any possibility
of jitter affecting the sound quality. Even the input receiver
and the sample rate converter serve to further reduce jitter.
IMPEDANCE MATCHING TRANSFORMERS
The best way to understand the Bryston BDA-1 External
DAC is to follow the flow of a signal from when it first arrives
at the BDA-1 in digital form to when it leaves to drive an
external analog input. The digital signal first arrives at the
BDA-1 via either the SPDIF COAX, OPTICAL OR AES
EBU inputs or the USB interface input. These are the standard
digital outputs from a CD Drive, Sound Card, Computer,
Music Server etc. There are 6 digital inputs, which are
easily selected using a front panel switch. This digital signal
contains data at over 1 million bits per second that requires
a bandwidth of 5 to 10 million hertz (cycles per second). At
these high frequencies, it is very important to maintain the
quality of the signal by having the correct termination at the
digital inputs. The BDA-1 provides for this termination in
the best possible manner using devices called impedance
matching transformers. Impedance matching transformers
provide the optimal interface to the incoming source under
all sorts of signal conditions. Lesser quality terminations will
degrade the signal, causing increased jitter.
separate power transformers for separate
analog and digital power supplies.
multi-stage voltage
regulation and filtering
for analog and digital
power supplies
discrete analog
amplifier output
stages
digital input
signal isolation
transformers
dual D/A
convertors