Intel Fireface 800 manual Level Meter

Page 75

31.14 Level Meter

The Fireface 800 calculates all the display values Peak, Over and RMS in hardware, in order to be capable of using them independent of the software in use, and to significantly reduce the CPU load.

Tip: This feature, the Hardware Level Meter, is used by DIGICheck (Windows only, see chap- ter 16) to display Peak/RMS level meters of all channels, nearly without any CPU load.

The level meters integrated in TotalMix - considering their size - cannot be compared with DIGICheck. Nevertheless they already include many useful functions.

Peak and RMS is displayed for every channel. 'Level Meter Setup' (menu Options or F2) and direct keyboard entry (hotkeys) make various options available:

•Display range 40 or 60 dB (hotkey 4 or 6)

•Release time of the Peak display (Fast/Medium/Slow)

•Numerical display selectable either Peak or RMS (Hotkey E or R)

•Number of consecutive samples for Overload display (1 to 15)

•RMS display absolute or relative to 0 dBFS (Hotkey 3 or 0)

The latter is a point often overlooked, but nonetheless important. A RMS measurement shows 3 dB less for sine signals. While this is mathematically correct, it is not very reasonable for a level meter. Therefore the RMS readout is usually corrected by 3 dB, so that a full scale sine signal shows 0 dBFS on both Peak and RMS me- ters. This setting also yields directly readable signal-to- noise values. Otherwise the value shown with noise is 3 dB better than it actually is (because the reference is not 0 dB, but -3 dB). For example in WaveLab.

The value displayed in the text field is independent of the setting 40/60 dB, it represents the full 24 bit range of the RMS measurement, thus making possible a SNR meas- urement 'RMS unweighted', which you would otherwise need extremely expensive measurement devices for. An example: An RME ADI-8 DS connected to the Fireface's ADAT port will show around -113 dBFS on all eight channel's input level meters.

This level display will constantly bring the reduced dy- namic range of your equipment, maybe of the whole

studio, in front of your eyes. Nice to have everything 24 bit - but still noise and hum everywhere in the range around -90 dB or worse... sorry, but this is the disappointing reality. The up-side about it is that TotalMix allows for constantly monitoring the signal quality without effort. Thus it can be a valuable tool for sound optimization and error removal in the studio.

Measuring SNR (Signal to Noise) requires to press R (for RMS) and 0 (for referring to 0 dBFS, a full scale signal). The text display will then show the same value as an expensive measurement system, when measuring ‘RMS unweighted’.

User's Guide Fireface 800 © RME

75

Page 74 Page 76
Image 75
Page 74 Page 76
Contents TotalMix Bit / 192 kHz SyncAlignZLMSyncCheck SteadyClock Most powerful FireWire audio interface everInstallation and Operation Windows Installation and Operation Mac OSGeneral Stand-Alone Operation, Connections and TotalMix Technical Reference Important Safety Instructions InstallationMains Users Guide Fireface 800 RME General System Requirements Package ContentsBrief Description and Characteristics IntroductionFirst Usage Quickstart Connectors and Front PanelAccessories Quick StartPart Number Description Warranty AppendixTrademarks Users Guide Fireface 800 RME CE / FCC Compliance RoHSISO Users Guide Fireface 800 RME Installation and Operation Windows Desktop Computer Hardware InstallationDriver Installation Driver and FirmwareDriver Update Deinstalling the DriversFirmware Update Settings dialog General Configuring the FirefaceLimit Bandwidth Phantom PowerBuffer Size InputsOptions Clock ModeWord Clock Out SyncCheckSettings dialog DDS Application examples Clock Modes SynchronizationLimit Bandwidth Available SettingsPlayback Operation and UsageDVD-Playback AC-3/DTS AC-3 / DTSMultichannel Low Latency under MME Buffer Size Adjustment Fireface Analog 1+2 MME Fireface Analog 1+2Multi-Client and Multi-Channel using WDM Multi-client OperationASIO-Multiclient Digital Recording Analog Recording Operation under AsioWindows 2000/XP Known ProblemsCommon Problems Operation under Gsif Gigasampler InterfaceUsing more than one Fireface DIGICheck 8 Adat channels don’t seem to work Hotline TroubleshootingInstallation Channel Routing Asio at 96 kHz DiagramsChannel Routing MME at 96 kHz Users Guide Fireface 800 RME Mac OS X Installation and Operation Driver Firmware Update Configuring the Fireface Level Out LevelAutoSync Ref Settings dialog DDS Clock Modes Synchronization Limit Bandwidth Mac OS X FAQ Round about Driver InstallationMidi doesnt work Various Information Repairing Disk PermissionsFireWire Compatibility Supported Sample RatesPossible causes for a Fireface not working Multicard OperationDiagram Channel Routing at 96 kHz Users Guide Fireface 800 RME Stand-Alone Operation, Connections and TotalMix Stand-alone Operation Reference DBFS @ Headroom Analog InputsLine Rear Microphone / Line FrontInstrument DriveSpeaker Emulation Headphones Analog OutputsLine Digital Connections AdatSpdif Midi Special Characteristics of the Spdif OutputOutput Word ClockWord Clock Input and Output InputTechnical Description and Usage Operation Cabling and TerminationOverview TotalMix Routing and MonitoringUsers Guide Fireface 800 RME User Interface Tour de TotalMix Elements of a ChannelUsers Guide Fireface 800 RME Mute and Solo Submix ViewPresets Quick Access PanelPreset Banks PresetPreferences Monitor PanelEditing the Names Main MonitorStereo Pan Law Hotkeys Menu Options Level Meter Elements of the Matrix View TotalMix The MatrixTotalMix Super-Features Advantages of the MatrixAsio Direct Monitoring Windows only Selection and Group-based Operation Copy Routings to other ChannelsDelete Routings Recording a Subgroup Loopback Using external Effects Devices Mixing several input signals into one record channelRecording a Softwares playback MS Processing Meaning in TotalMix Midi Remote ControlMapping ElementSetup Monitor Main 3E / 62 / D Preset 3 38 / 56 / #GPreset 5 3A / 58 / #A Simple Midi ControlLoopback Detection Stand-Alone Midi Control Mackie Control ProtocolMeaning in Fireface Simple Midi Control Element Meaning in FirefaceUsers Guide Fireface 800 RME Technical Reference Tech Info Analog Technical SpecificationsDigital DA, Line Out 1-8, rearDA Stereo Monitor Output Phones Adat Optical Digital InputsDigital Outputs Transfer Modes Resolution / Bits per Sample Windows onlyLock and SyncCheck Technical BackgroundSample frequency kHz 44.1 88.2 176.4 192 Latency and MonitoringHow much Zero is Zero? OversamplingFireWire Audio Safety BufferCore Audios Safety Offset Limit Bandwidth 48 kHz 96 kHz 192 kHz FW-Kanäle Number of Channels and Bus LoadAnalog DS Signal Port DS Double SpeedQS Quad Speed Type AES3-1992 IEC Byte Mode BitSteadyClock Noise level in DS / QS ModeBlock Diagram Fireface TRS Phones jack Connector PinoutsTRS jacks of analog input / output XLR jacks of analog inputs

Fireface 800 specifications

The Intel Fireface 800 is a powerful audio interface celebrated for its high-performance capabilities and versatility in both studio and live settings. Designed to cater to the needs of musicians, producers, and sound engineers, it stands out with its rich feature set and reliable technology.

One of the defining features of the Fireface 800 is its support for an impressive 26 input and 28 output channels. This extensive I/O configuration facilitates seamless integration with a wide variety of audio production setups, allowing users to record multiple instruments simultaneously or create complex routing scenarios. The unit also boasts top-notch analog and digital converters, ensuring pristine sound quality with a dynamic range that captures the nuances of any audio source.

In terms of connectivity, the Fireface 800 is equipped with both FireWire and USB ports, making it compatible with a range of computers and devices. The device utilizes the FireWire 800 protocol, which delivers higher data transfer rates compared to its predecessor. This efficient transfer capability is crucial for maintaining audio fidelity and reducing latency, making it an ideal choice for real-time monitoring and recording.

The Fireface 800 also features standalone operation capabilities, functioning independently of a computer when needed. This is particularly useful for live performances, where reliability and reduced setup complexity are essential. Users can easily connect microphones, instruments, and other equipment directly to the Fireface 800, making it a versatile tool for a variety of scenarios.

With its low-latency driver technology, the Fireface 800 ensures smooth performance even when handling demanding audio tasks. Its advanced ADAT and S/PDIF digital inputs and outputs provide further flexibility for connecting other gear, such as additional preamps and effects processors.

Another noteworthy characteristic of the Fireface 800 is its robust build quality. Designed for regular use in professional environments, the unit features a rugged metal chassis that can withstand the rigors of transport and daily use. This ensures longevity and consistent performance for audio professionals who depend on reliable equipment day in and day out.

In summary, the Intel Fireface 800 is a versatile and powerful audio interface that caters to a wide spectrum of audio production needs. With its extensive I/O capabilities, high-quality converters, reliable connectivity options, and robust design, it continues to be a popular choice among audio professionals striving for excellence in their work.
Top Page Image Contents