FAQ

Welcome to the dCS Knowledge Base. You can either browse the Knowledge Base by category or search for content using the search field at the bottom of the page (please use keywords rather than sentences to search).

Why does the Rossini Player display “No Disc” when an SACD is loaded?

The Rossini Player reads RedBook CDs or the CD layer of hybrid discs only. We could not find an CD/SACD mechanism of sufficient quality to use in the Rossini Player.

Can I use the Rossini Master Clock with my Vivaldi system?

It is possible to use the Rossini Clock with a Vivaldi DAC and Transport, or (in a limited way) a Vivaldi Upsampler and DAC. The Rossini Clock does not have enough outputs to synchronise 3 units.

How can I play SACDs with my Rossini Player or DAC?

The Rossini Player or DAC is designed to accept DSD data from SACDs played on a Vivaldi Transport, Scarlatti Transport (v1.11) or Paganini Transport (v1.11) via the Dual AES interface.

Using a Scarlatti Transport with a Vivaldi system, why does the sound drop out?

If the the system is set to lock to the Master Clock set to 176.4kHz, you will find that the Scarlatti Transport  is not displaying “Sync” because it cannot lock to 176.4kHz word clock. Set the Master Clock Group driving the Transport (v1.11) to 44.1 or 88.2kHz .
The Vivaldi Transport will lock to 176.4kHz word clock.

If I load the dCS USB Driver 2014, can I play 24/384 files via my dCS USB device?

The updated Windows driver can be used with Debussy, Puccini, Paganini and Scarlatti USB Class 2 products at up to 24/192 (+ DoP). The USB interface on the Vivaldi DAC v1.10 and USB1 on the Vivaldi Upsampler v1.10 will also accept data at 24/352.8 or 24/384.

How do I use the Vivaldi DAC’s “Universal Master Mode”?

This feature is for use with Vivaldi DAC v1.10 and Vivaldi Upsampler v1.10 onwards. Many computer audio libraries contain files at several different sample rates. Changing rates sometimes causes locking problems when the DAC is set to standard Master Mode. To avoid this, we have added Universal Master Mode  – this sets the DAC’s Word Clock Output to generate 38.4kHz always. The Upsampler can lock both its crystal oscillators to this frequency, simplifying the locking sequence. If you have a Vivaldi Master Clock, use this instead – it gives better sonic performance. Our other products are not compatible with this feature at the time of writing.

Can I play 24/352.8 or 24/384 files via the USB interface?

The Vivaldi DAC and Vivaldi Upsampler loaded with software v1.10 onwards will accept 24/352.8 or 24/384 data via USB. For Windows PCs, the dCS USB Driver 2014 must be installed. Other products will not accept data at these rates directly over USB, so the streaming program should be set to down-sample to 192kS/s maximum.

Some of the Vivaldi DAC and Upsampler’s inputs have disappeared

Software version 1.10 onwards temporarily disables any inputs that are not connected and driven with digital data. This makes it easier to find the inputs you are actually using. Once you connect an input to an active source, you will be able to select it. (The Upsampler’s USB2, iPod and Network inputs do not have this feature.)

If I load the dCS USB Driver 2014, can I play 24/384 files via my dCS USB device?

The updated Windows driver can be used with Debussy, Puccini, Paganini and Scarlatti USB Class 2 products at up to 24/192 (+ DoP). The USB interface on the Vivaldi DAC v1.10 and USB1 on the Vivaldi Upsampler v1.10 will also accept data at 24/352.8 or 24/384.

How do I use the Vivaldi DAC’s “Universal Master Mode”?

This feature is for use with Vivaldi DAC v1.10 and Vivaldi Upsampler v1.10 onwards. Many computer audio libraries contain files at several different sample rates. Changing rates sometimes causes locking problems when the DAC is set to standard Master Mode. To avoid this, we have added Universal Master Mode  – this sets the DAC’s Word Clock Output to generate 38.4kHz always. The Upsampler can lock both its crystal oscillators to this frequency, simplifying the locking sequence. If you have a Vivaldi Master Clock, use this instead – it gives better sonic performance. Our other products are not compatible with this feature at the time of writing.

Can I play 24/352.8 or 24/384 files via the USB interface?

The Vivaldi DAC and Vivaldi Upsampler loaded with software v1.10 onwards will accept 24/352.8 or 24/384 data via USB. For Windows PCs, the dCS USB Driver 2014 must be installed. Older products will not accept data at these rates directly over USB, so the streaming program should be set to down-sample to 192kS/s maximum.

Some of the Vivaldi DAC and Upsampler’s inputs have disappeared

Software version 1.10 onwards temporarily disables any inputs that are not connected and driven with digital data. This makes it easier to find the inputs you are actually using. Once you connect an input to an active source, you will be able to select it. (The Upsampler’s USB2, iPod and Network inputs do not have this feature.)

Is there a dCS-recommended cable kit?

No. We have looked into this possibility before, but each time the practical problems of supplying such a kit world-wide prove insoluble. Please ask your dealer for cable recommendations.

Using JRiver for Mac OSX, why does my dCS system report 16 bit data?

JRiver for Mac appears to use the maximum word-length setting in the OSX CoreAudio system. Open the Audio MIDI Setup page and set the Output Format for the dCS device to “2ch – 24bit Integer” to correct this.

The Sleep and OFF buttons on my dCS remote do not work.

Hold down the Sleep button for about 2 seconds to set a dCS unit or a full stack to Sleep mode, then press the OFF button briefly if you want to switch off completely. This helps to prevent the system being set to Sleep mode or turned off by accident.

My new dCS remote did not work on receipt.

The most common cause of this is inserting the batteries the wrong way around. Press the flat (negative) end of each battery against the spiral spring and push the battery into the holder. You will find a picture of the correct battery orientation in the manual.

What is the difference in accuracy between a Rubidium atomic clock and a dCS Master Clock?

Rubidium Clocks are typically accurate to 0.1 parts per billion in the medium term (about 1000 times more accurate than a dCS Master Clock) but they generate some short-term jitter due to the way they operate. Our opinion is that stability (i.e. low jitter) is much more important than extreme accuracy, so we have steered our Master Clock development in that direction.

How do I add an atomic clock to my dCS system?

You can improve the accuracy of the timing in your system by slaving dCS Master Clocks (Vivaldi, Scarlatti, Paganini Plus) to the 10MHz output from a Rubidium reference generator.
To do this, connect the 10MHz output to the Master Clock’s Reference Input and set the Coupling menu page to AC. The Master Clock will take a few seconds to lock and then will display the “locked” icon.
Listening tests have shown that a dCS Master Clock is very effective at reducing atomic clock jitter and the combination gives improved sonic performance.

How can I turn off the Filter in the DAC or Upsampler?

The short answer is you cannot and you would not like the result if you could!
The dCS Ring DAC (TM) is an oversampling design, filtering is necessary to remove aliases produced by the oversampling process and Nyquist images produced by the conversion to analogue. These artefacts appear as mirror images of the audio band at higher frequencies, they cause unpleasant intermodulation effects if they are not removed. The digital conversion in the Upsampler generates aliases also, so these must be filtered out for the same reason.

How do I use the Dual AES DSD interface in a full Scarlatti / Paganini system?

If your system does not include an Upsampler, set the Transport to Vivaldi Mode and connect the Dual AES out to the DAC.
The Scarlatti & Paganini DACs have only one Dual AES input, so you will need to decide which source is most important to you when setting up a full system.
– If your priority is SACD, use Dual AES from the Transport with Vivaldi Mode tuned on. For CD playback, use 1394 from the Upsampler.
– If your priority is CD, use Dual AES from the Upsampler. For SACD playback, use 1394 from the Transport.
In both cases, make sure the system is correctly clocked.

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