Rockna Wavedream DAC with balanced configration
Rockna is a brand from Romania. Its designer Nicolea is the engineer behind many big brands, including PS Audio, MSB and Gawain. Rockna has made bold innovations in the architecture of the decoder. Unlike traditional decoders that use a digital receiving chip plus a decoding chip, Rockna completely uses a programmable logic array in the digital processing part.（FPGA）To achieve this, a FPGA contains algorithms for USB interface processing, digital receiving and demodulation, clock processing and digital filtering, and all algorithms including the USB receiving interface are new designs rather than using ready-made solutions; in the analog part , The latest version of Rockna uses a self-designed R2R resistor array decoding module, using two pieces per channel to achieve a truly fully balanced design; the power supply part uses three custom transformers for the digital part and the analog part of the left and right channels. Powered, the entire sound performance is neutral and atmospheric without losing its delicateness. As a decoder with a new generation architecture, Rockna also provides an interface for IIS digital signal input, eliminating the need for demodulation in the machine, which can further improve the sound performance. The highest supported format: 24bit 192KHz（Coaxial, AES）, 24bit, 384KHz, DSD512（USB）, DSD Native（IIS） |
WaveDream DAC uses MSB R2R decoding module (Platinum and Signature)
R2R decoding module is different from Delta Sigma decoding. It reproduces extremely real sound with a high-speed switch combination of extremely precise thin-film resistors. It is naturally balanced and durable, with fast response and meticulous detail. R2R decoding modules are only developed by a few high-end manufacturers, and WaveDream''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s self-developed modules are the pioneers of R2R.Self-developed integrated digital processing
Most DACs only use a few common chips in the market for digital processing. To surpass ordinary DACs, WaveDream uses its own firmware program to process digital messages in real-time in parallel with an FPGA (Field Programmable Gate Array). The direct line drives the MSB module to reduce jitter and avoid interference between lines. Opening the case shows that the line is extremely concise, which is in great contrast to the general decoding design.
In-house developed ultra-low jitter Digital Controlled Ocillator (DCO)
The WaveDream clock is designed for the overall digital processing solution. DCO is selected to support simple, direct and low jitter integrated signal processing. DCO can control any frequency from 32kHz to 3MHz and also reach 300fs jitter. DCO can also directly provide MSB requirements 3MHz clock speed. There is no need to generate the frequency required by the MSB module from the fixed frequency clock acid.
WaveDream can track the clock speed of the signal source and fine-tune the DCO to achieve the same clock speed as the signal source. With RAM Buffered Digital Phase Loop Lock (DPLL) to reduce the transmission jitter to a very low level, it can achieve the same signal without an external Reference Clock. Source synchronization, no need for ASRC, and no buffer overrun or under-run, avoiding the problems caused by ASRC (generally DAC uses Asynchronous Sample Rate Converter to solve the synchronization of the source and the internal clock), all of which are developed by ourselves FPGA Firmware processing.
Excellent function, easy to update
Updating the firmware, adding functions, and improving the sound quality of the filter is as easy as you can. Just use the USB bit perfect to play the wav file containing the firmware. The firmware update will automatically start to protect the user''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s investment.
Three self-developed filters (Linear, Minimum, Hybrid) are available for selection, or you can choose to have no Filter.
You can choose to use Differing or not, the clock can be Streaming or Internal, and Volume Control is built-in.
Pair with the same factory battery to drive the regenerative digital source, and use HD-Link (differential I2S) to directly drive WaveDream.
CAS users must deeply experience the problem of digital signal pollution. The Hydra-X+ produced by the same factory is designed to solve the above problems. It completely separates the computer circuit and uses a battery-powered FPGA processor plus a high-precision clock to regenerate digital Signal, direct drive WaveDream decoder.
It is well known that the design limitations of SPDIF cannot meet the requirements of audiophile. WaveDream uses HD-Link (Differential I2S on HDMI cable) to enhance digital transmission. Several manufacturers support HD-Link, and a large number of high-quality HDMI cables are available. Hydra-X+ connects to WaveDream with HD-Link, which is the best choice for the ultimate CAS.
May 2016
In the US 6moon review 2016 Mooney Black Show, the best room is the bile system with Rockna turntable + decoding and EML tube:）
http://www.6moons.com/industryfeatures/munich2016/3.html
The Rockna room was selected as the second place among the best top5 rooms at the Munich exhibition selected by the famous pf evaluation website.
http://positive-feedback.com/show-reports/munich-2016-show-report-part-1/
Most of the best rooms on different evaluation websites are quite different, but at the same time choosing Rockna this exhibition room is also enough to show Rockna''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s strength!
February 2016: http://www.6moons.com/audioreviews2/rockna2/1.html
US 6moon latest review
Update October 2015:
Rockna decoding has now been upgraded to a new version:
Standard hardware upgrade part:
1. The clock part is completely re-upgraded and built as a VCXO, and the architecture and crystal oscillator are fully upgraded;
2. The analog chip has been upgraded from the original 24bit and 25bit to 26bit and 28bit, and the measured value and sense of hearing have been greatly improved;
3. Replace 3 power cattle with higher quality;
4. Upgrade the output stage of the old version of the op amp to a high-quality pure A output stage.
At the same time, the manufacturer has developed a further upgraded version for Chinese fans, upgraded to Special Edition SE, which is only available in China:
1. Upgrade the underlying firmware of all receiving chips to make it more suitable for audio transmission;
2. Upgradeletter of agreement;
3. Upgrade FPGA algorithm;
4. Support DSD512；
5. When the frequency is up-converted and filtered to the best operating point frequency of the analog chip, 100% is achieved.
Non-National Bank products can be upgraded for a fee, and the firmware upgrade fee is 10,000 yuan.