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User’s Guide HDSP System RPM 

© RME

 

28

 

 

15.10 Level Meter  

 
Having set a new standard with the level meters of DIGICheck, Hammerfall DSP goes even 
further: The calculation of the Peak, RMS and Over is realized in hardware, in order to be 
capable of using them independent of the software in use, and to significantly reduce the CPU 
load. 
 
The level meters integrated in TotalMix - considering their size - cannot be compared with the 

HDSP Meter Bridge

 (chapter 20.2). Nevertheless they already include many useful functions. 

 
Peak and RMS is displayed for every channel. 'Level Meter Setup' (Menu Options or F2) or 
direct keyboard entry (

hotkeys

) makes 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. RMS shows 3 dB less for sine signals. This is 
mathematically correct, but not very reasonable for a level 
meter. Therefore, we had corrected DIGICheck's RMS 
display by 3 dB, a full scale sine signal shows both 0 dBFS 
Peak and RMS. This setting also yields directly readable 
signal-to-noise values, while other applications (like 
WaveLab) will show a value 3 dB better than actual 
(because the reference is not 0 dB, but -3 dB). 
 
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 
measurement 'RMS unweighted', which you would 
otherwise need extremely expensive measurement 
devices for. An ADI-8 DS connected to the RPM will 
therefore show around -113 dB on all 8 channels. 
 
This level display will constantly bring the reduced 
dynamic 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 hard 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’.

 

 
Note: There is no RMS calculation for the third row, the physical outputs. Therefore these green 
bars show the peak value. 

 

 

Содержание Hammerfall RPM

Страница 1: ...User s Guide Hammerfall DSP System RPM Mobile Turntable CD MIC MIDI Interface PCI Busmaster Digital I O System PCI and CardBus Interface 24 Bit 96 kHz TotalMix 24 Bit 96 kHz SyncAlign ZLM...

Страница 2: ...Playback 11 8 3 Multi Client Operation 12 8 4 DVD Playback under MME 12 8 5 Low Latency under MME 13 8 6 Recording 14 8 7 Analog Inputs 15 8 8 Analog Outputs 16 9 Configuring the RPM 17 10 Disconnect...

Страница 3: ...17 3 Copy Routings to other Channels 31 17 4 Delete Routings 31 18 Notes on Laptops and CardBus 32 19 Hotline Troubleshooting 19 1 General 33 19 2 Installation 33 20 HDSP Software 20 1 DIGICheck 34 2...

Страница 4: ...all functions directly in hardware and not in the driver i e the CPU 2 Package Contents Please check that your Hammerfall DSP System s package contains each of the following PCI Interface PCI card HDS...

Страница 5: ...tion TotalMix 102 channel mixer with 40 bit internal resolution 5 Technical Specifications 5 1 Digital Internal sample rates 32 44 1 48 88 2 96 kHz Internal resolution 24 Bit 5 2 Analog AD Phono Input...

Страница 6: ...1 dB 20 Hz 20 8 kHz sf 44 1 kHz Frequency response DA 0 5 dB 10 Hz 44 kHz sf 96 kHz Signal to Noise Ratio SNR 108 dB RMS unweighted unmuted 111 dBA THD 98 dB 0 0013 THD N 91 dB 0 002 Channel separatio...

Страница 7: ...ce the computer s housing 6 Reconnect all cables including the power cord 7 Connect PCI interface and RPM using the supplied cable IEEE1394 This is a standard FireWire cable 6 pin 6 2 CardBus Card Bef...

Страница 8: ...ver or similar come up Don t listen to Microsoft listen to us and continue with the installation In case the Hardware Wizard does not show up automatically after installation of the card do not attemp...

Страница 9: ...ork when the computer is switched off and on again The interface then has to be re programmed at the factory We have invested a lot of work to prevent the system from getting in this state If it happe...

Страница 10: ...connection to the interface has been interrupted Error cable not connected etc The latter causes the LED to flash After the firmware has been loaded into the I O box the LED extinguishes thus signalli...

Страница 11: ...anted noises If you feel you cannot do without system sounds you should consider buying a cheap Blaster clone and select this as Preferred Device in Control Panel Multimedia Audio The RME Driver CD in...

Страница 12: ...our sophisticated tool DIGICheck It operates like an ASIO host using a special technique to access playback channels already occupied Therefore DIGICheck is able to perform an analyzis and display of...

Страница 13: ...ws ME 2000 XP latencies far lower can be used SAWStudio and Sonar allowed to use such low settings from the start Sequoia was updated in version 5 91 WaveLab in version 3 04 In the HDSP s Settings dia...

Страница 14: ...refore any signals about 96dB below maximum level are lost entirely On the other hand there is nothing to gain from recording a 16 bit signal at 24 bit resolution this would only waste precious space...

Страница 15: ...its headphone output as these can be adjusted nearly always A simple cable adapter stereo TRS jack to 2 x RCA is available in many stores see next page The phono inputs not only heavily amplify the v...

Страница 16: ...e DA converters offer lots of dynamic range headroom by their Signal to Noise of about 110 dB The maximum output level at the TRS jacks is 14 dBu equalling 4 V RMS Thanks to this high level balanced o...

Страница 17: ...s The status displays at the bottom of the dialog box give the user precise information about the current status of the system Buffer Size The setting Buffer Size determines the latency between incomi...

Страница 18: ...computer the RPM can be used in a fixed configuration for example as Phono preamp with monitoring Phono and Line preamp with mixing functionality Microphone preamp Headphone mixer Line splitter wioth...

Страница 19: ...or MIDI clock In both cases the used software is repsonsible for proper synchronization to other devices In case a project includes audio tracks the software must be capable of recalculating the audio...

Страница 20: ...le ASIO could use channels 1 2 and Gigastudio with GSIF channels 3 4 simultaneously and so on Simultaneous operation of GSIF and ASIO requires to use different channels For example if Cubase uses trac...

Страница 21: ...chbay function distributing signals to several outputs at a time simultaneous playback of different programs over only one stereo channel mixing of the input signal to the playback signal complete ASI...

Страница 22: ...analog outputs Every single channel has various elements Input and playback channels each have a mute and solo button Below each there is the panpot realized as indicator bar L R in order to save spa...

Страница 23: ...well Often signals are stereo i e a pair of two channels It is therefore helpful to be able to make the routing settings for two channels at once Press the Ctrl key and click into the routing window o...

Страница 24: ...faders and panpots has already been mentioned But the Ctrl key can do far more than changing the routing pairwise Clicking anywhere into the fader area with the Ctrl key pressed sets the fader to 0 d...

Страница 25: ...ll combinations are possible Submix sets all routing windows to the same selection as described before Deactivating Submix automatically recalls the previous view The mixer can also be made smaller ho...

Страница 26: ...m a All playback channels 0 dB routet to the same output All output channels 0 dB Phones 6 dB and linked Submix of all inputs and outputs to the Phones output with input faders set to m a playback to...

Страница 27: ...ill be switched on and off automatically In Mix mode the input signal will be mixed on the outputs when record is active In Replace mode the Mute button of the corresponding playback channel will be a...

Страница 28: ...ignal shows both 0 dBFS Peak and RMS This setting also yields directly readable signal to noise values while other applications like WaveLab will show a value 3 dB better than actual because the refer...

Страница 29: ...n field Shows the current gain value as dB Orange gain field This routing is muted To maintain overview when the window size has been reduced the left and upper labels are floating They won t left the...

Страница 30: ...you to set up routings which would be nearly impossible to achieve by fiddling around with level and pan Let s say you want to send input 1 to output 1 at 0 dB to output 2 at 3 dB to output 3 at 6 dB...

Страница 31: ...headphones Select input 4 open the menu Edit It shows Copy In 4 Now select the desired new input for example In 1 The menu now shows Paste In 4 to In 1 Click on it done If you are familiar with this f...

Страница 32: ...ted thoroughly on several notebooks by RME Basically our CardBus card operates with any notebook we have tested But there were some significant performance differences and some laptops suffered from a...

Страница 33: ...tion under Windows 2000 XP on single CPU systems To use ASIO at lowest latencies under Windows 2000 XP even when only having one CPU the system performance has to be optimized for background tasks Go...

Страница 34: ...howing the typical afterglow of a oscilloscope tube Includes Correlation meter and level meter Spectral Analyser World wide unique 10 20 or 30 band display in analog bandpass filter technology 192 kHz...

Страница 35: ...nufacturers 36001 Firewire cable IEE1394 6M 6M 1 m 3 3 ft 36002 Firewire cable IEE1394 6M 6M 3 m 9 9 ft 36005 Firewire cable IEE1394 6M 6M 5 m 16 4 ft 36010 Firewire cable IEE1394 6M 6M 10 m 32 8 ft F...

Страница 36: ...changes in the drivers Configuring Logic Samplitude Cubase Cakewalk Sonar and SAWPlus32 Step by step instructions for use with RME cards DIGICheck Analysis tests and measurements with the DIGI96 seri...

Страница 37: ...you can load a complete copy of the RME website from the RME Driver CD in the rmeaudio web directory into your browser Trademarks All trademarks registered or otherwise are the property of their resp...

Страница 38: ...User s Guide HDSP System RPM RME 38 25 Block Diagram RPM...

Страница 39: ...s and if not installed and used according to the instructions in the User s Guide may cause interference harmful to the operation of other electronic devices Compliance with FCC regulations does not g...

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