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  1. Okto Research

    Okto dac8 stereo DAC Review

    Hello everyone, I hope you are all doing well in these crazy times and I want to assure you that we are working hard on manufacturing and delivering our products. In the past couple of months, we have moved to a new, more spacious location. It took us quite a lot of time to equip it and...
  2. Okto Research

    Okto dac8 stereo DAC Review

    Thanks, we did the noise part (measuring the dac8 Stereo's noise with with the lowest APx555B range). Curiously, that lead to a different result than the automated AES17 measurement, since we got 1.42μV of 0-20kHz noise, resulting in around 1μV after subtracting the analyzer's own 1μV...
  3. Okto Research

    Okto dac8 stereo DAC Review

    Thank you for the review! The filter acronyms are explained in the product manual: FRLP = fast roll-off, linear phase; FRMP = fast roll-off, minimum phase; BW = brickwall etc. :) The external USB jumper is a necessity, because the standard format Raspberry Pi does not have USB routed to its...
  4. Okto Research

    Review and Measurements of Okto DAC8 8Ch DAC & Amp

    I confirm this is going to work for syncing two units set to receive audio data over USB. The unit set to "Pure USB" mode will become a "master" unit, providing its clock to the other one, set to "USB/AES" mode, which will accommodate its frequency of data requests to the USB host in a way to be...
  5. Okto Research

    Review and Measurements of Okto DAC8 8Ch DAC & Amp

    Steve, I suggest you to opt for a refund or replacement as suggested by me in e-mail previously. Remote on your dac8 PRO operated properly while the unit was away from your plasma TV, but the issue came back after you returned it to the original location. I tried to describe the reason as well...
  6. Okto Research

    Review and Measurements of Okto DAC8 8Ch DAC & Amp

    Hi everyone! The dac8 Stereo is ready to be sent to ASR and the first orders are shipping next week. Right after that the product will become available again on our website. Bits per sample information is only displayed in either USB or USB/AES mode (for USB data). The reason is that while...
  7. Okto Research

    Review and Measurements of Okto DAC8 8Ch DAC & Amp

    Yes, it can. The streaming version of the dac8 Stereo also includes an SD card, USB Wi-Fi adapter and a USB interconnect. In case you add the Raspberry Pi later on by yourself, you need to choose a Wi-Fi adapter carefully so it has an antenna that can be rotated into an upwards position (the Pi...
  8. Okto Research

    Review and Measurements of Okto DAC8 8Ch DAC & Amp

    https://www.oktoresearch.com/ Hit Shift+F5 if you are on Windows and visited the site previously so the new CSS stylesheet gets loaded. Cheers, Pavel
  9. Okto Research

    Review and Measurements of Okto DAC8 8Ch DAC & Amp

    Your DAC8 PRO is on its way to you :). Don't worry, we are all fine here at Okto Research and I hope everyone on the forum is as well. Our e-shop is going to re-open within 24 hours.
  10. Okto Research

    Review and Measurements of Okto DAC8 8Ch DAC & Amp

    The only thing standing in a way is a website update and owner's manual release we are working on. Stay tuned.
  11. Okto Research

    Review and Measurements of Okto DAC8 8Ch DAC & Amp

    Our DACs are not powered from the USB and they draw a negligible current, but they need to sense a voltage on the USB port. This voltage is filtered before it is brought to the processor handling the USB. Both DAC8 PRO and DAC8 Stereo were designed to be agnostic to the USB cable. The full...
  12. Okto Research

    Review and Measurements of Okto DAC8 8Ch DAC & Amp

    The DAC8 PRO/Stereo also process native DSD as DSD from the beginning to the end. They are indeed! Pavel
  13. Okto Research

    Review and Measurements of Okto DAC8 8Ch DAC & Amp

    Yes, the manufacturer makes it hollow (milled-out) from the inside. Maybe they target aerospace applications, who knows. Our custom made knob is full, although still aluminum, so not super heavy. The inertia is defeated by the detents of the sensor (rotary encoder). Glad you like the product!
  14. Okto Research

    Review and Measurements of Okto DAC8 8Ch DAC & Amp

    The above mentioned price adjustment for the DAC8 PRO will bring it to the level of the DAC8 Stereo. No one is bullying you, it is a preliminary information and the change is not going to happen until we have DAC8 PROs in stock and ready to ship. Also, the European DAC8 PRO tour has started...
  15. Okto Research

    Review and Measurements of Okto DAC8 8Ch DAC & Amp

    It is still the ES9028PRO, we just were just able to squeeze more from it. The old 8-channel demo unit still holds quite well in the ASR chart in companion of stereo DACs and it doesn't enjoy the benefit of decreased noise due to Sabre channel summing. With the DAC8 PRO, we took that performance...
  16. Okto Research

    Review and Measurements of Okto DAC8 8Ch DAC & Amp

    After months of hard work, we are here on the very end of the year to share what we have accomplished with our new product, the DAC8 Stereo! Connectivity We received many questions about a possibility of a a second optical input, so we decided to make it a last-minute addition. The full set of...
  17. Okto Research

    Review and Measurements of Okto DAC8 8Ch DAC & Amp

    Custom output voltage still available as an off-menu option. May turn into a paid extra in future. With balanced amplifier inputs, output pop at turn on/off should be abysmal and only related to DC offset (typically 1-2mV). Well, this is self-answering. There is no buzzing coming from the DAC8...
  18. Okto Research

    Review and Measurements of Okto DAC8 8Ch DAC & Amp

    We are now building and shipping around 5 DAC8 PROs a week. This number should significantly increase in the beginning of December, so hopefully we will be able to ship the vast majority of orders before Christmas. The old, beaten-up demo unit (the one reviewed) is about to be sold to a tour...
  19. Okto Research

    Review and Measurements of Okto DAC8 8Ch DAC & Amp

    The audio manufacturers mostly do not develop their own ASIO driver, but they licence it from a German company called Thesycon. We are deciding on the following steps to take regarding a Windows ASIO driver. But we have tested ASIO4ALL as an output of JRiver, combined with JRiver's "virtual...
  20. Okto Research

    Review and Measurements of Okto DAC8 8Ch DAC & Amp

    Well, the same happens with an analog volume (or attenuator). The tyranny of reality makes us unable to enjoy the full dynamic range of our hi-fi equipment at low volume simply by the existence of a non-zero sound pressure level in our listening rooms. There is around 20-30dB SPL in a very quiet...
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