MicroDAC 5 User's Manual - Digital Audio Corporation
MicroDAC 5 User's Manual - Digital Audio Corporation MicroDAC 5 User's Manual - Digital Audio Corporation
2.2 Using Digital Input Audio for Reference CancellationThe S/PDIF and TOSLINK inputs always receive two channels of audio, LEFTchannel and RIGHT channel. For reference cancellation, these two channelsmay contain a stereo primary signal, a mono primary and a reference signal, oronly a mono primary.This means that if you want to cancel more than one reference from a monodigital signal, or if you want to apply reference cancellation to a stereo digitalsignal, you will need to use a combination of digital and analog inputs. Forexample:To cancel one reference from a stereo S/PDIF primary, select S/PDIF onthe front panel INPUT SELECT, and choose STEREO and 2CH in theFilter Controls. Use the S/PDIF input connector to feed the primarychannels into the unit. Use the LREF ANALOG input to feed the referencesignal into the unit.To cancel three references from a mono TOSLINK primary, selectTOSLINK on the front panel INPUT SELECT, and choose MONO and4CH in the FILTER CONTROLS. Use the TOSLINK input connector tofeed the primary and one of the references into the unit. Use the LREFand RREF ANALOG inputs to feed the other two references into the unit.To cancel a single reference from a mono S/PDIF primary, put the primarysignal on the left S/PDIF channel, and choose MONO in the FILTERCONTROLS. You may put the reference signal on either the S/PDIF rightchannel OR the ANALOG LREF input, setting the FILTER CONTROLS tothe 2CH mode, where the red LED is lit on the reference channel you areusing.See section 3.1.4 for more information on how to define your use of primary andreference channels.2.3 Other ConnectorsThe POWER connector should be connected to +12V DC, 2A. The USB 2.0connector is used to connect the unit to the PC for use with the MicroDAC 5configuration software.Two external switch connectors are available for remotely clearing and freezingthe adaptive filters. See section 3.2 for more information on these controls.Page 4
3 Standalone ControlsControls on the MicroDAC 5 unit are used to configure the audio I/O and also toprovide a limited set of filter controls. While the PC software provides much finercontrol of the filtering in the MicroDAC 5 unit, these panel controls can be used toconfigure the MicroDAC 5 unit when not connected to the PC. These“standalone” controls are described below.3.1 Front PanelFigure 3-1: MicroDAC 5 Front Panel3.1.1 Audio I/O FormatUse the INPUT SELECT switch in the upper left corner to select ANALOG,S/PDIF, or TOSLINK audio format for the primary inputs. This selection affectsonly the LEFT and RIGHT input signals. Regardless of the selection, referencesignals can be input on the LREF and RREF ANALOG inputs. Also regardless ofthe selection, the output audio is sent to both the ANALOG OUTPUTS and theTOSLINK OUTPUT.3.1.2 Headphone ControlsUse the controls in the lower left corner to control the audio you listen to on theheadphones. Use the INPUT/OUTPUT switch to select the audio you want tolisten to on the headphones (via the 3.5mm jack). When INPUT is selected, youwill hear the primary input signals – left and right for the stereo modes, or left inboth ears for the mono modes. When OUTPUT is selected, you will hear theprocessed output audio. Use VOLUME to adjust the listening level on theheadphones.By default, these controls affect only the headphone audio, and the ANALOGOUTPUTS and TOSLINK OUTPUT always contain output audio. However,using the MicroDAC 5 Configuration Utility software, you can enable a “Line OutToggle” mode in which the rear panel audio outputs toggle along with theheadphone output. Regardless of whether rear-panel output toggling is enabled,Page 5
- Page 1: Multi-Channel Reference CancellerUS
- Page 7: 1 Overview1.1 IntroductionMicroDAC
- Page 14 and 15: 3.1.4.5 Clear FiltersUse the CLEAR
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- Page 18 and 19: 5.3 FiltersFour different filters a
- Page 20 and 21: Figure 5-3: Mono sub-menuIn mono mo
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- Page 27 and 28: are stored in nonvolatile memory on
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- Page 31 and 32: 6 FiltersTo configure a specific fi
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2.2 Using <strong>Digital</strong> Input <strong>Audio</strong> for Reference CancellationThe S/PDIF and TOSLINK inputs always receive two channels of audio, LEFTchannel and RIGHT channel. For reference cancellation, these two channelsmay contain a stereo primary signal, a mono primary and a reference signal, oronly a mono primary.This means that if you want to cancel more than one reference from a monodigital signal, or if you want to apply reference cancellation to a stereo digitalsignal, you will need to use a combination of digital and analog inputs. Forexample:To cancel one reference from a stereo S/PDIF primary, select S/PDIF onthe front panel INPUT SELECT, and choose STEREO and 2CH in theFilter Controls. Use the S/PDIF input connector to feed the primarychannels into the unit. Use the LREF ANALOG input to feed the referencesignal into the unit.To cancel three references from a mono TOSLINK primary, selectTOSLINK on the front panel INPUT SELECT, and choose MONO and4CH in the FILTER CONTROLS. Use the TOSLINK input connector tofeed the primary and one of the references into the unit. Use the LREFand RREF ANALOG inputs to feed the other two references into the unit.To cancel a single reference from a mono S/PDIF primary, put the primarysignal on the left S/PDIF channel, and choose MONO in the FILTERCONTROLS. You may put the reference signal on either the S/PDIF rightchannel OR the ANALOG LREF input, setting the FILTER CONTROLS tothe 2CH mode, where the red LED is lit on the reference channel you areusing.See section 3.1.4 for more information on how to define your use of primary andreference channels.2.3 Other ConnectorsThe POWER connector should be connected to +12V DC, 2A. The USB 2.0connector is used to connect the unit to the PC for use with the <strong>MicroDAC</strong> 5configuration software.Two external switch connectors are available for remotely clearing and freezingthe adaptive filters. See section 3.2 for more information on these controls.Page 4
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