Pioneer VSX-AX5Ai-S Professional Acoustic Calibration, How to interpret the graphical output

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Advanced setup

11

Professional Acoustic Calibration

This setup minimizes the unwanted effects of room reverberation by calibrating your system based on the direct sound coming from the speakers. It can also provide you with a graphical output of the frequency response of your room.

Note

•Before setting up with Professional Acoustic Calibration, you should finish calibrating using the Auto Surround Setup on page 12.

How to use Professional Acoustic Calibration

If you find that lower frequencies seem overly reverberant in your listening room (i.e. it sounds ‘boomy’), or that different channels seem to exhibit different reverb characteristics, use the Auto Pro setup to calibrate the room automatically. This should provide a more balanced calibration than simply using the standard Acoustic Calibration EQ.

If you still aren’t satisfied with the results, the manual Advanced EQ Setup allows you to customize your system calibration with the help of a graphical output that can be displayed on-screen, or using a computer (with software available from Pioneer—see Connecting a PC for Advanced MCACC output on page 79 for more on this).

How to interpret the graphical output

The graph shows decibels on the vertical axis and time (in milliseconds) on the horizontal axis. A straight line indicates a flat-response room (no reverb), whereas a sloping line indicates the presence of reverberation when outputting test tones. The sloping line will eventually flatten out when the reverberant sound stabilizes (this usually takes about 100ms or so).

By analyzing the graph, you should be able to see how your room is responding to certain frequencies. Differences in channel level and speaker distance are taken into account automatically (compensation is provided for comparison purposes), but the frequency measurements are always shown without the equalization performed by this receiver.

Note that due to an effect known as ‘group delay’, lower frequencies will take longer to be generated than higher frequencies (this is most obvious when comparing the frequencies at 0ms). This initial slope is not a problem (i.e. excessive reverb) with your listening room.

Setting Professional Acoustic Calibration according to your room characteristics

Using the manual setup, you can set the time period at which the frequency response is analyzed for calibration. You can pinpoint the time that is best for calibration of the system for your particular room characteristics.

The graph below shows the difference between standard acoustic calibration and professional calibration (the gray circles represent the point at which the microphone captures the sound for frequency analysis).

Level

 

 

 

 

 

 

Test tone

 

Acoustic Cal. EQ Pro

Standard Acoustic Cal.

 

 

calibration range

EQ calibration range

 

 

 

 

Time

0

80

160

(in msec.)

 

As soon as audio is output from your speaker system, it is influenced by room characteristics, such as walls, furniture, and the dimensions of the room. The sooner the frequency analysis, the less it is influenced by the room. We recommend an earlier time setting of 20–40ms to compensate for two major factors that will influence the sound of most rooms:

•Reverberance of high vs. low frequencies – Depending on your room, you may find that lower frequencies seem overly reverberant compared to higher frequencies (i.e. your room sounds ‘boomy’). This may result in a skewed frequency analysis if the measurement is done too late.

Level

 

 

Low

 

 

frequencies

 

 

 

 

High

 

 

 

 

frequencies

 

 

Acoustic Cal. EQ Pro

Standard Acoustic Cal.

 

 

 

 

calibration range

EQ calibration range

 

 

 

 

 

 

 

Time

0

80

160

 

(in msec.)

 

 

•Reverb characteristics for different channels – Reverb characteristics can be somewhat different for each channel. Since this difference increases as the sound is influenced by the various room characteristics, it is often better to capture a frequency analysis early on for smoother mixing of channel frequencies/sounds.

Level

 

 

Left

 

 

surround

 

 

 

 

Right

 

 

 

 

Surround

 

 

Acoustic Cal. EQ Pro

Standard Acoustic Cal.

 

 

 

 

calibration range

EQ calibration range

 

 

 

 

 

 

 

Time

0

80

160

 

(in msec.)

 

 

If your room isn’t affected by the factors above, it is often not necessary to make a 20–40ms setting. Later time settings may provide a more detailed sound experience with your speaker system. It is best to try and see what works best for your particular room.

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Contents VSX-AX5Ai-SVSX-AX5Ai-G Risk of Electric Shock Do not Open Operating EnvironmentInformation to User Voltage selectorContents Additional information Controlling other equipment Advanced setupUsing other functions Other connectionsBefore you start Chapter FeaturesChecking the supplied accessories Before you startOpening the front panel Installing the receiverUsing the remote control Before you startRemote control battery indicator Operating range of the remote controlIntroduction to home theater Setting up for Surround SoundMinute guide Minute guide ChapterConnect your speakers 02 5 minute guideMinute guide Use the on-screen Auto Surround setup to set up your systemLarge ‘SurrBack System’ should be highlighted. Press Switch on the receiver and your TV‘Surround Setup’ should be highlighted. Press EnterMake sure ‘Normal System’ is selected, then select ‘Exit’ ‘Auto Setting’ should be highlighted. PressFollow the instructions on-screen Playing a source Checking the settings on your DVD or other playerOther problems when using the Auto Surround Setup If the receiver isn’t already on, switch on the powerConnecting your equipment Chapter Connecting your equipmentRear panel About the video converter Connecting your equipmentDigital audio cables When making cable connectionsAbout cable types Analog audio cablesConnecting your equipment Connecting your TV DVD player Connecting your equipment Connecting a DVD playerVSX-AX5Ai Connecting the multichannel analog outputsSTB Connecting your equipment Connecting a VCR or DVD recorder Connecting your equipment Connecting other video sources DVD player Connecting your equipment Using the component video jacksConnecting your equipment Connecting digital audio sources Tape deck, etc Connecting your equipment Connecting analog audio sourcesPortable DVD player, etc Front left Center Front right Connecting your equipment Installing your speaker systemBare wire connections Connecting the speakersPlacing the speakers AM loop antenna Connecting your equipment Connecting antennasFM wire antenna Connecting external antennasPlugging in the receiver Outdoor antenna Indoor antenna Vinyl-coated wire MetersAbout the AC outlet Controls and displays Chapter Controls and displaysFront panel Controls and displays BASS/TREBLE Mcacc Setup MIC jackTone Control ToneTuned Controls and displays DisplayControls and displays Remote control Movie / Music Remote SetupAudio TV InputListening to your system Chapter Listening to your systemAuto playback Listening in surround sound Advanced effect modes Listening to your systemMovie listening modes Basic modesMusic listening modes Dolby Pro Logic IIx Music settingsPro Logic IIx Music See above Listening in stereo Listening with headphonesAdjusting the advanced effect level Neo6 Music settingsListening with Acoustic Calibration Listening to your system Selecting the input signal type NEO6 Listening to your system Using the surround back channelOn the remote control, press RECEIVER, then press HI-BIT Using the audio scaler for Hi-bit and Hi-samplingTreble Using the tone controlSwitching the tone control on or off Adjusting the bass and trebleReducing noise during playback Release the button when you see the setting you wantListening to dual mono soundtracks Finding a station Using the tunerUsing the tuner Chapter Tuning directly to a stationMPX mode Using the tunerNaming station presets Listening to memorized station presetsAbcdefghijklmnopqrstuvwxyz Press Disp Mode to select the RDS information display Using the tuner An introduction to RDSDisplaying RDS information Searching for RDS programs Using EONPress EON Mode to select one of the possible modes An introduction to EONClearing all stations from the RDS and EON searches Press and hold EON Mode for about two secondsPress Enter Select the setting you want to adjust Surround Setup menuSurround Setup menu Chapter Making receiver settings from the Surround Setup menuSpeaker Setting Surround Setup menuSurround back speaker setting Normal surround settingChannel Level Select ‘Channel Level’ from the Normal setup menuSpeaker Distance Select ‘Speaker Distance’ from the Normal setup menuControlling other equipment Chapter Using the remote control with other componentsRecalling preset codes Controlling other equipmentControlling other equipment Programming signals from other remote controlsDisc Controlling other equipment Controls for TVsMenu GuideMode Controlling other equipment Controls for other componentsSubtitle DispExit TOPRepeat steps 2-4 for as many components as you want Controlling other equipment Direct functionMulti Operation and System Off Programming a multi-operation or a shutdown sequenceTo add or change a command select ‘Change’ and press Enter Using multi operationsPress Multi Operation Using System off Switching components on and off using the 12 volt triggerOperating other Pioneer components with this unit’s sensor Making an audio or a video recording Using other functionsUsing other functions Chapter Adjusting the delay of a soundtrackDimming the display Enhancing Sacd playbackEditing remote control display names Using other functionsSwitching the speaker impedance Advanced remote control featuresClearing remote control settings Adjusting the remote control backlightUsing other functions Resetting the system Other connections Chapter Second Zone speaker B setupSwitching the speaker system Other connectionsSpeaker Bi-wiring your speakersOther connections Bi-amping your front speakers Front leftMaking multi-room connections Basic multi-room setupSurrBack System multi-room setup Other connections Multi-room listeningPress Control Using the multi-room controlsUse the Master Volume dial to adjust the volume Other connectionsOther connections Connecting additional amplifiersOther connections Using the i.LINK interface About Pqls rate control Other connections About i.LINKCreating an i.LINK network Press Input on the remote control repeatedly to select USB Other connections Using the USB interfaceConnect your computer’s USB terminal to Advanced Mcacc output using your PC Other connections Connecting a PC for Advanced Mcacc outputSelect ‘PC Output’ and press Enter Select the setting you want to adjust then press Advanced setupAdvanced setup Chapter System Setup menuAssigning the digital inputs Advanced setupTHX Cinema Setup Input Assign menuSelect ‘Component-In Select’ from the Input Assign menu Assigning the component video inputsAssigning the i.LINK inputs Component-1 OFF Component-2 OFFFunction Rename Select ‘Function Rename’ from the System Setup menuSelect the name of the input you want to rename PHONO/LINE Setup Sacd SetupVolt Trigger Multi-Room and IR receiver setupSelect ‘Expert’ then press Enter Advanced setup Expert setup menuCrossover Network Select ‘Crossover Network’ from the Expert setup menuSelect ‘Fine Channel Level’ from the Expert setup menu Adjust the level of the left channel Setting the Acoustic Calibration EQ automatically Fine Channel Delay Acoustic Calibration EQ Front Align Setting the Acoustic Calibration EQ manuallySelect CUSTOM1 Adjust or CUSTOM2 Adjust Select the channels you want and adjust to your likingSelect ‘Exit’ to copy and confirm Copying your Acoustic Calibration EQ settingsChecking your Acoustic Calibration EQ settings Select ‘DATA COPY’ then press EnterHow to interpret the graphical output How to use Professional Acoustic CalibrationProfessional Acoustic Calibration If you selected ‘Auto Pro.’, select ‘Start’ and press Using Professional Acoustic CalibrationSelect a setup option Select ‘Professional’Bass Peak Level Select ‘Bass Peak Level’ from the Expert setup menuChoose the setting that you want Select ‘D-Range Control’ from the Expert setup menuDynamic Range Control Additional information Chapter TroubleshootingPower Additional informationNo sound Additional informationDigital inputs on Other audio problemsVideo Symptom CauseDisplay SettingsPRO Logic II or Neo6 Remote controlLink messages Link interfaceChanging the frequency step Maintenance of external surfacesUSB interface Dolby Additional information Surround sound formatsAdditional information About THX DVR Additional information Preset code brandsDVD CD-RAdditional information Specifications European model Continuous Power Output Additional information Specifications Multi-voltage modelPioneer Corporation
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