User manual
DELAY TIME VS BANDWIDTH
Just like any other BBD-based effect, Sarajewo
achieves long delays by reducing the clock
rate, which inevitably limits the usable band-
width. At the end of the scale, the (normally
ultrasonic) clock is slowed enough to become
an audible whine. Also, it produces some alias-
ing and imaging artifacts, as well as increased
background noise.
Sarajewo handles this problem by automat-
attenuate unwanted components just before
they become audible. That is why the signal
becomes dark when the delay is set beyond
500ms, and even darker the further the scale.
Each unit comes factory calibrated to achieve
the optimal balance between the bandwidth
and artifacts.
USAGE TIPS
Sarajewo is intended as a long delay effect unit,
and as such, it excels at longer settings. For best
results at the shortest delay you are advised to
use the t
1
output and combine it with moder-
ate, but not minimum delay time settings of the
t
3
time dial. To make Sarajewo work as ex-
to patch the t
1
output to the ext feedback
loop input. To mix the dry signal with the wet
signal from the t
1
output, an external mixer is
needed, as the internal effect mixer always
crossfades between the dry and the t
3
signal.
ACCESSORY
Our Coal Mine black panels are available for
all Xaoc Devices modules. Sold separately. Ask
your favorite retailer. •
7
BBD
TECHNOLOGY
Bucket Brigade Delay is an analog technol-
ogy used in vintage integrated circuits that
were popular in the 1970s, long before digital signal converters
and digital memory were affordable. Each BBD chip contains thousands of small capacitors and pMOS
or nMOS transistors that act as analog switches. The signal is transferred as an electric charge that
clock signal governs the speed of charge transmission, and directly controls the delay time: the faster
the clock, the shorter the delay (and vice versa). Due to the limitations of vintage technology, signal deg-
Even though contemporary digital delay effects offer a much cleaner signal, BBD delays are still sought
after due to their desirable sonic characteristics. Furthermore, the range of delay time offered by just
a single BBD chip is limited to 20–300 ms, which is much less than what is commonly expected from
modern delay effects. In order to achieve more attractive delay times, several chips must be used and
-
tion at extreme delay time settings due to the accumulation of noise and distortion from multiple stages.