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Related Manuals for Okto Research dac8 PRO
Summary of Contents for Okto Research dac8 PRO
- Page 1 PRO A versatile, high-performance 8-channel D/A converter Owner’s Manual...
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Page 2: Table Of Contents
Status submenu ........................................23 Advanced submenu ......................................24 Mains voltage selection ......................................24 Troubleshooting........................................25 Issue 1: USB input not recognized ................................25 Issue 2: Dropouts during AES/EBU playback ............................25 Service and warranty ......................................26 Manual revisions ........................................27 2 | dac8 PRO Owner’s Manual | okto research... -
Page 3: Specifications
Headphone output (front side) 6.3 mm (1/4”) TRS connector Output level: 4.2 V RMS full-scale 120 mA linear output current fixed to output channels 1 and 2 output impedance <100 mOhm 3 | dac8 PRO Owner’s Manual | okto research... - Page 4 Mains voltage: 120 V AC or 230 V AC, according to the mains voltage of the country from which the order was placed, unless requested otherwise Standard 3-pin IEC 60320 power connector Power rating: 15 W Fuse: F400mA 4 | dac8 PRO Owner’s Manual | okto research...
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Page 5: Mechanical Drawings
Mechanical drawings 5 | dac8 PRO Owner’s Manual | okto research... -
Page 6: Back Panel Overview
Back panel overview Package contents dac8 PRO (silver or black depending on your choice, 120 V or 230 V according to the mains voltage of the country from which the order was placed, unless requested otherwise rack mounting brackets (optional) In an effort to reduce electronic waste, we've decided not to include the standard disposable USB and power cables in the package. -
Page 7: Digital Connections
Digital connections The dac8 PRO is compliant with USB Audio Class 2 (UAC2), a widely used digital audio interface standard that enables asynchronous operation. This feature allows the DAC to control data flow according to its own high-precision oscillator, bypassing any requirements for the precision of the clock in the source device or cables. - Page 8 To reduce latency, navigate to the USB driver's control panel, select the "Buffer Settings" tab, and change the buffer size in the dropdown menu. The dac8 PRO is tested to work with 1.5 ms output latency for playback and 1.67 ms for recording; however, the host computer must be able to provide data in a timely manner to avoid buffer underruns and dropouts during playback.
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Page 9: Aes/Ebu Inputs
Warning: The USB input of the dac8 PRO may not work correctly when connected to a USB hub or a legacy USB 1.0 port. Be sure to use a USB 2.0 (or newer) port when connecting the unit. AES/EBU inputs The dac8 PRO offers four AES/EBU inputs that are free of resampling. -
Page 10: Spdif Compatibility
SPDIF compatibility The AES/EBU inputs of the dac8 PRO will also accept a signal with the SPDIF voltage level of 0.5V peak-to-peak. The termination impedance requirements differ between the two standards, and while the SPDIF signal will generally be received correctly, it is recommended to either employ an impedance-matching transformer or use a 75 Ohm RCA –... -
Page 11: Volume Operation
PRO volume is set to -12 dB or higher. Consequently, the upper 12 dB of the dac8 PRO's output would remain unused. By lowering the output voltage of the dac8 PRO to 1 V, its noise floor could be reduced by 12 dB, preserving the dynamic range. -
Page 12: Headphone Output
Doing so will result in significantly decreased analog performance due to the short they present to the output of the dac8 PRO's analog stage, potentially overloading it and risking damage after long-term use with high signal levels. Warranty does not apply to units with analog circuitry damaged by using XLR to RCA cables and converters. -
Page 13: Input Modes
The Pure USB input mode allows 8-channel playback from the USB host using the dac8 PRO's internal low phase noise oscillator as the clock source. This means that the dac8 PRO is in control of the playback speed by providing feedback to the host. -
Page 14: Pure Aes
AES/EBU input connectors. It utilizes the clock recovered from the first AES/EBU input for processing the received digital audio data, and the dac8 PRO's internal low-phase noise oscillators for the actual D/A conversion. The dac8 PRO's jitter eliminator is active in Pure AES mode, ensuring the highest possible jitter rejection and performance. -
Page 15: Controls
Remote control The dac8 PRO can be paired with any remote that has a minimum of seven buttons. For a detailed description of the pairing process, please refer to the “System submenu” section. -
Page 16: User Interface And Menu System
1 2 3 4 5 6 7 8 Input mode indicator: displays the selected input mode Audio data information: displays sample rate, bit depth and data format (relevant to the input mode) 16 | dac8 PRO Owner’s Manual | okto research... -
Page 17: Main Screen, Right
Main menu The main menu will appear on the left screen upon pressing the knob, or by pressing the Menu button on the remote control. Volume Routing System Displays Filters Status Advanced 17 | dac8 PRO Owner’s Manual | okto research... -
Page 18: Volume Submenu
CH1 to CH8 volume: per-channel volume for individual channels range: 0 to -50 dB (default: 0 dB) Routing submenu Out1 source: Out2 source: Out8 source: Out 1-to-8 source selects the source channel for the respective analog output 18 | dac8 PRO Owner’s Manual | okto research... -
Page 19: System Submenu
7 buttons in a sequence: Up, Down, Left, Right, Enter, Menu and On/Off/Mute. To cancel the procedure, simply press and hold the rotary control. Load defaults: loads factory defaults 19 | dac8 PRO Owner’s Manual | okto research... -
Page 20: Displays Submenu
(default) 10 s 60 s 5 min Filters submenu PCM filter FRMP DSD filter auto PCM filter: selects FIR filter type for interpolation of PCM-encoded signal FRLP (fast roll-off, linear phase): 20 | dac8 PRO Owner’s Manual | okto research... - Page 21 SRLP (slow roll-off, linear phase): FRMP (fast roll-off, minimum phase) (default): SRMP (slow roll-off, minimum phase): 21 | dac8 PRO Owner’s Manual | okto research...
- Page 22 AFRLP (apodizing, fast roll-off, linear phase): HFRMP (hybrid, fast roll-off, minimum phase): BW (brickwall): 22 | dac8 PRO Owner’s Manual | okto research...
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Page 23: Status Submenu
FW version: shows the current version of the device firmware Temperature: reading of the temperature on the DAC module Uptime: shows the elapsed time since the unit was powered on 23 | dac8 PRO Owner’s Manual | okto research... -
Page 24: Advanced Submenu
Each dac8 PRO leaves our factory with the input voltage set according to the mains voltage of the country from which the order was placed, unless specified otherwise. If you wish to alter this selection at a later time, please adhere to the following steps. -
Page 25: Troubleshooting
This section is designed to help you identify and resolve potential issues that may arise during the use of your dac8 PRO. If you are unable to resolve an issue following these steps, or if the problem is not listed here, please contact us for further assistance. -
Page 26: Service And Warranty
We are committed to providing technical support and spare parts to both original and second-hand owners. The dac8 PRO is designed for maximum reliability, with each unit undergoing extensive testing before shipment. In the unlikely event of spontaneous malfunction, the product is covered by a 2-year warranty. -
Page 27: Manual Revisions
Rev. 1.3 Large number of changes accompanying the release of the v1.5 firmware Rev. 1.2 Small changes, extended XLR-to-RCA disclaimer, mailing address update Rev. 1.1 Improved drawings Rev. 1.0 Initial release 27 | dac8 PRO Owner’s Manual | okto research...