H8 DSP USER’S MANUAL Digital Interface Processor rev 1.1e hertzaudiovideo.
H8 DSP Digital Interface Processor User’s manual Index 1. PRODUCT DESCRIPTION / SAFETY PRECAUTIONS ....................................................................................................... 03 2. PACKAGING CONTENTS .................................................................................................................................................... 03 3. H8 DSP and DRC INSTALLATION ..................................................................................................
H8 DSP User’s manual 1/2 Digital Interface Processor 1. PRODUCT DESCRIPTION / SAFETY PRECAUTIONS The H8 DSP is a digital signal processor essential to maximize the acoustic performance of your car audio system. It consists of a 32-bit DSP processor and 24-bit AD and DA converters. It can connect to any factory system, even in vehicles featuring an integrated audio processor, since, thanks to the de-equalization function, the H8 DSP will provide a linear signal.
H8 DSP User’s manual 3 Digital Interface Processor 3. H8 DSP AND DRC INSTALLATION 191 mm / 7.51” 121 mm / 4.76” 121 mm / 4.76” 121 mm / 4.76” External dimensions 191 mm / 7.51” Mounting dimensions 34 mm / 1,33” 34 mm / 1,33” 34 mm / 1,33” 191 mm / 7.51” 183.6 mm / 7.22” 80 mm / 3.14” 80 mm / 3.14” 80 mm / 3.14” How to install 4,2x20mm / 0,16”x0,78” 183.6 mm / 7.22” 183.6 mm / 7.
H8 DSP User’s manual 4 Digital Interface Processor 4. CONNECTION PANELS – DESCRIPTION 4.1 MULTIPOLAR CONNECTOR The H8 DSP features a 20 multipolar interface for input signals, power supply and various control connections. 1: Violet RR+ 2: Gray FR+ 3: White FL+ 4: Green RL+ 5: Red REM IN 6: Pink MEM A 7: Brown OPTICAL SELECT 8: N. C.
H8 DSP User’s manual 4 Digital Interface Processor 4.2 INPUT SIGNALS 2 3 1: Violet RR+ 2: Gray FR+ 3: White FL+ 4: Green RL+ 11: Violet RR- 12: Gray FR- 13: White FL- 14: Green RL- 1 1. INPUTS; RL - FL - FR - RR. Hi-level MASTER inputs (SPEAKERS). The H8 DSP features 4 HI-LEVEL signal inputs to connect amplified signal cables coming from the main analog source. Input sensitivity is adjustable from 2 to 15 V RMS. 2. AUX IN L - R; auxiliary low-level stereo input.
H8 DSP User’s manual 4 Digital Interface Processor 4.4 INPUTS – REMOTE CONTROL OUTPUTS AND POWER SUPPLY 18: Yellow +BATT 20: Black -BATT 5: Red REM IN 15: Red REM IN 9: Blue REM OUT 10: Cyan KEY MEM 7: Brown OPTICAL SEL 17: Orange AUX SEL 6: Pink MEM A SEL 16: Pink/Black MEM B SEL 1 6 7 2 3 4 5 1. POWER SUPPLY. +BATT 12V: 12V Power supply positive connection terminal. -BATT: Power supply negative connection terminal (GND).
H8 DSP User’s manual 4 Digital Interface Processor 3. KEY MEM: To turn the processor on and off when the vehicle ignition is turned on / off. Remark: This signal is memory-dependent: if the processor was turned off by a car sub-key connected to the KEY MEM, it will turn on again by turning the ignition key on. If the processor was turned off by a different method (e.g.
H8 DSP User’s manual 4 Digital Interface Processor 4.5 CONTROLS AND SETTINGS 6 3 2 1 5 4 7 1. IN level: Input signals adjustments. By turning the knobs counter-clockwise, sensitivity decreases; by turning them clockwise, it increases. This setting is important for an optimal signal / noise ratio (see 8.1 - 8.2). 2. CLIP: Input clipping detector (see 8.1.9). If the LED lights up, it indicates clipping on the selected input. 3. DE-EQ CHECK: When lit, the meaning varies based on state (see 6.2).
H8 DSP User’s manual 5 Digital Interface Processor 5 CONNECTIONS 5.1 POWER SUPPLY AND REMOTE TURN ON WARNING: to power the device, use 1 mm2 (16 AWG) cables. REM IN REM IN Blue REM OUT Red REM IN REMOTE OUT Cyan (light blue) KEY MEM Yellow +BATT 12V 1 mm2 - 16 AWG Black -BATT Fuse Holder Not Provided Suggested Fuse T1A-delayed Ground + - (vedi sez. 5.2.2) 12V Battery Ground Remark: the H8 DSP is internally protected by a fuse-resistor soldered to its printed circuit board.
H8 DSP User’s manual 5 Digital Interface Processor 5.3 PERSONAL COMPUTER AND DIGITAL REMOTE CONTROL (DRC) DRC HE (optional) SRC MEM USB cable (provided) WARNING: if a DRC is not installed in the system the H8 DSP is set up with the volume adjustment to the maximum acoustic level. Connecting the processor without performing the required adjustments may lead the system to play at full power causing a strong acoustic noise and damaging the speakers. 5.4 HIGH-LEVEL INPUT SIGNALS 1.
H8 DSP User’s manual 5 Digital Interface Processor 5.5 LOW-LEVEL INPUT SIGNALS AUX IN L/R: Auxiliary analog stereo signal. Sensitivity is adjustable from 0.6 to 5 V RMS PRE OUT RADIO DECK MP3 PLAYER AUXILIARY STEREO PREAMPLIFIER SOURCE AUXILIARY STEREO PREAMPLIFIER SOURCE 5.6 OPTICAL IN DIGITAL INPUT DRC HE (optional) SRC MEM TOSLINK CONNECTOR OPTICAL CABLE DIGITAL INPUT- WARNING: the digital input accepts up to 96 kHz / 24 bit stereo PCM signals.
H8 DSP User’s manual 5 Digital Interface Processor 5.7 OUTPUT SIGNALS OUTPUT TO PRE AMPLIFIERS’ SYSTEM CH 1 ÷ CH 4 CH 5 ÷ CH 6 CH 7 CH 8 DRC HE (optional) SRC MEM WARNING: if a DRC is not installed in the system the H8 DSP is set up with the volume adjustment to the maximum acoustic level. Connecting the processor without performing the required adjustments may lead the system to play at full power causing a strong acoustic noise and damaging the speakers.
H8 DSP User’s manual 6 Digital Interface Processor 6. HOW TO SETUP THE H8 DSP WITHOUT A PC The H8 DSP can be used without a PC and in this case it will not be possible to use the sole the DE-EQ (de-equalization) function to eliminate any pre-existing equalization in the OEM audio system. The device will store the following default settings: 1. 2. 3. 4. Front and Rear stereo broadband inputs; AUX input ; OPTICAL Input 2 Way Front + Rear + Center + Subwoofer (Vedi 5.
H8 DSP Digital Interface Processor User’s manual 6 4. MASTER inputs IN LEVEL calibration. This procedure is delicate and requires utmost accuracy. Improper execution may invalidate the final acoustic results. The H8 DSP outputs must be disconnected from the amplifiers. • While playing track 1 of the CD, turn the first knob towards the highest sensitivity (position +). • When the orange LED lights up or flashes, stop turning and go back slightly until the LED turns off.
H8 DSP User’s manual 6 Digital Interface Processor 2. De-equalization analysis: H8 DSP set up. • Press the DE-EQ SET button and check the DE-EQ CHECK LED following the instructions in the image below.
H8 DSP User’s manual 6 Digital Interface Processor 6.3 AMPLIFIERS SENSITIVITY CALIBRATION Once the H8 DSP input calibration or de-equalization (if any) procedures are complete, you can calibrate the amplifiers sensitivity. • Set the amplifiers crossover filters as desired and then connect them to the speakers. • Connect the H8 DSP PRE outputs (CH1÷CH8) to the amplifiers inputs using high quality RCA cables. • Set the amplifiers sensitivity of the various channels to about 4.0 Volts. 1.
H8 DSP User’s manual 7 Digital Interface Processor 7. H8 DSP SOFTWARE AND DRIVERS INSTALLATION / UNINSTALLATION GUIDE 7.1 PC SOFTWARE INSTALLATION GUIDE 1. 2. Insert the “H8 DSP Setup CD 1.0” CD-ROM into the CD player of the PC you are going to use. Windows XP: select My Computer from the Windows START menu; Windows Vista: select Computer from the Windows START menu; Windows 7: select Computer from the Windows START menu; Windows 8/10: click on the DESKTOP icon; Windows XP 3.
H8 DSP Digital Interface Processor 5. Windows XP: select NEXT to continue with the installation or CANCEL to interrupt it; Windows Vista: select NEXT to continue with the installation or CANCEL to interrupt it; Windows 7: select NEXT to continue with the installation or CANCEL to interrupt it; Windows 8/10: select NEXT to go on with the installation or CANCEL to interrupt it: 6.
H8 DSP User’s manual 7 Digital Interface Processor 8. Windows XP: complete the installation procedure, then select CLOSE to exit the installation; Windows Vista: complete the installation procedure, then select CLOSE to exit the installation; Windows 7: complete the installation procedure, then select CLOSE to exit the installation: Windows 8/10: go on and complete the installation procedure, then select CLOSE to exit the installation; 7.2 DRIVERS INSTALLATION GUIDE 1. Turn the H8 DSP on. 2.
H8 DSP Digital Interface Processor User’s manual 7 7.3 H8 DSP SOFTWARE UNINSTALL Procedure 1 To uninstall the H8 DSP PC software you can use the link listed on the following menu: Start / All Programs / H8 DSP / uninstall. Procedure 2 To uninstall the H8 DSP PC software you can also follow the standard procedure: Start / Control Panel / Applications Installation / H8 DSP / uninstall.
H8 DSP User’s manual 4 8 Digital Interface Processor 8. H8 DSP INSTALLATION GUIDE USING A PC. To configure the H8 DSP inputs, analog (PRE) outputs, equalizations and time delays, the processor must be connected to a PC after calibrating the input levels. At that point, you need to have in mind the system you want to develop, since from this moment if you want to change any of the settings, you will have to go through the guided procedure all over again.
H8 DSP Digital Interface Processor 4. User’s manual 8 If synchronization is successful, a dialog box will show the data exchange between processor and software. Wait a few seconds and, finally, confirm by selecting OK. At this point you need to have in mind the system you want to develop beforehand, since from this moment if you want to change any of the settings you will have to go through the guided procedure all over again.
H8 DSP User’s manual 8 Digital Interface Processor 7. Master high-level main inputs configuration. You can assign to any of the processor input channels a name corresponding to the signal coming from the source. The available names are: FL (Front Left Full); FR (Front Right Full); RL (Rear Left Full); RR (Rear Right Full); FLTW (Front Left Tweeter); FRTW (Front Right Tweeter); FLW (Front Left Woofer); FRW (Front Right Woofer); Sub L (Sub Left); Sub R (Sub Right).
H8 DSP Digital Interface Processor User’s manual 8 9. H8 DSP in Level inputs calibration. This procedure is delicate and requires utmost accuracy. Improper execution may invalidate the final acoustic results. The H8 DSP outputs must be disconnected from the amplifiers • While playing track 1 of the CD, turn the first knob towards the highest sensitivity (position +).
H8 DSP Digital Interface Processor User’s manual 8 11. Speaker groups passive crossover selection. E’ possibile indicare la presenza di crossover passivi che gestiscono gruppi funzionali di altoparlanti. E.g.: If the audio system includes passive crossovers, the software will request to set them up, otherwise select NEXT. A 2 or 3-way passive crossover only takes a single channel.
H8 DSP Digital Interface Processor User’s manual 8 15. Once the analysis is complete, the following messages could be displayed - Head unit is equalized: The head unit is equalized, so we recommend to de-equalize the signal afterwards. - Head unit is not equalized: The head unit is not equalized, so you do not need to de-equalize the signal afterwards Select BACK to go back to the previous step. Select NEXT to go ahead with the setup procedure. Select CANCEL to exit the procedure. 16.
H8 DSP User’s manual 8 Digital Interface Processor 20. Software Startup The settings selected during the guided procedure are transferred to the processor main memory. Once this operation is complete, a message confirming that the update is complete will be displayed. Select OK. We recommend to finalize the product and avoid losing data stored during calibration (see 8.5.3) with the FINALIZE TO H8 DSP function, from the main FILE menu. 21. Amplifiers sensitivity calibration.
H8 DSP Digital Interface Processor User’s manual 8 22. Aux In input sensitivity calibration. Once the system is calibrated and fully working through the Front / Rear inputs, you can calibrate the AUX IN inputs. AUX IN: DRC (optional) must be installed in order to activate this input or through the use of the dedicated AUX SEL terminal (see 4.4.4). - If a source with a CD player is connected to the AUX input, disconnect the H8 DSP outputs from the amplifiers and proceed as detailed in chapters 6.1.
H8 DSP User’s manual 8 Digital Interface Processor 8.3 ADJUSTING ACOUSTIC REPRODUCTION The following chapters detail the system adjustments and acoustic tuning features. WARNING: We recommend that you do not modify the settings of your H8 DSP to explore its features. Take your time to get familiar with the possibilities this software offers.
H8 DSP Digital Interface Processor User’s manual 8 2. Save Setup: it enables the storage of the entire H8 DSP configuration in a file (e.g. “H8Config.dip”) that you can subsequently load into the H8 DSP through the Load Setup function. This feature is available both in TARGET and in OFFLINE modes. 3. FINALlZE to H8 DSP: it enables the loading of all the parameters selected while configuring the H8 DSP into the internal memory, allowing it to work without being connected to a PC.
H8 DSP User’s manual 8 Digital Interface Processor 8.6 “CONFIG” MAIN MENU 3 1 2 3 4 5 6 If you click on the Config tab, a drop-down menu appears listing the entries shown in the image on the right: 1. I/O Configuration Wizard: it enables the system calibration and allowing the H8 DSP to function in the required conditions (see 8.1.5). 2. Working Mode - Standard / Expert: the software can work in two modes, acting on the crossover filter.
H8 DSP User’s manual 8 Digital Interface Processor 8.7 SELECTED INPUT 4 The Select Input window shows the source that is active while the H8 DSP is connected to the PC. You can select the desired source by clicking on it. Once the H8 DSP has been disconnected from the PC, you can select the H8 DSP input source through the DRC or the terminal wire (see 4.4.4 / 4.4.5). 8.8 CHANNEL MAP 5 This window displays the names given to the output channels.
H8 DSP User’s manual 8 Digital Interface Processor 8.10 FILTER SETTINGS 7 The H8 DSP has five crossover filters, one for each output channel. Each filter allows the setting of a single output channel parameters 1. Xover L/R Link: modifications applied to one of the channels (right or left) will also automatically be applied to the other one. To do so, click on the blue led which will light up. Xover L/R Link manages all Filter Settings adjustments except Set Distance (Delay). 2.
H8 DSP User’s manual 8 Digital Interface Processor 5. Cut-off frequencies - Hi-P Hz 10 ÷ 20000: filtro High-Pass - Lo-P Hz 10 ÷ 20000: filtro Low-Pass If you select the Band-Pass filter, both Hi-P Hz and Lo-P Hz boxes will be available to set up the band frequency.
H8 DSP User’s manual 8 Digital Interface Processor 8.11 SET DISTANCE AND DELAY 8 This setting automatically calculates the time it takes for the speaker sound to reach the listener’s ear (Fig. 1). Preliminary Remarks Sound moves through the air at a speed of 343 mt/sec (1.125 ft/sec) at a temperature of 20°C (68°F). If you know the distance from the sound emission point, you can then calculate the time sound takes to reach the listener’s ear.
H8 DSP User’s manual 8 Digital Interface Processor 83 cm m 7c 12 m 2c 13 m 5c 10 90 cm 11 6c m cm 78 164 cm Example of time delay setting (Fig.4): 1. Choose the system listening point. To identify the listening point, choose an ideal point located at the center of the listener’s (driver or passenger) head. For the front center and rear center points choose an intermediate point between the two (left / right) listeners. 2.
H8 DSP User’s manual 8 Digital Interface Processor 8.12 GRAPHIC EQUALIZER 9 The H8 DSP software features a 31-band, ± 12 dB graphic equalizer for each system channel. In compliance with ISO requirements, frequencies are equally spaced at 1/3 Oct. from 20 to 20 kHz. The equalizer works by groups. By default the equalizer groups will be: - one equalizer for the Front. - one equalizer for the Rear. - one equalizer for the Center. - one equalizer for the Subwoofer. E.g.
H8 DSP User’s manual 8 Digital Interface Processor 8.13 OUTPUT LEVEL 10 This section details the output levels of the H8 DSP channels as displayed by the software. Please note the description of each one of the points marked with numbers in the image below. 1 5 6 7 4 2 3 By acting on one of the sliders belonging to the output channels, you can adjust the output level (-40 ÷ 0 dB) 1 for each channel. The sliders activate according to the output setup.
H8 DSP Digital Interface Processor User’s manual 8 c- Set the desired output equalizations (see 8.12). d- Insert a CD with a highly dynamic track. e- Select the “Link” function 4 , move the slider and increase the output channels level until possible clipping occurs; in this case move the slider back to at least 2-3 dB (check the value on one of the displays 2 ). f- Increase the “Volume” 6 to the maximum undistorted level taking it close to “0” dB.
H8 DSP Digital Interface Processor User’s manual 9 9. TROUBLESHOOTING 9.1 SYNCHRONIZATION WITH A PC 1. H8 DSP functioning problems - If, while tuning the system with a laptop PC, the H8 DSP should present any functioning problems, try to disconnect the laptop PC power supply cable. In this way, with the laptop PC working on battery power, a possible voltage difference in USB ground between car ground (H8 DSP) and earth (PC) can be avoided. 2.
H8 DSP Digital Interface Processor User’s manual 9 9.3 FIRMWARE UPGRADE If there are product UPGRADES available online, proceed as follows: - Save the previous setup (if you wish to consult it in OFFLINE mode); - Disconnect the RCA cables. Start H8 DSP PC Software and select TARGET mode. 1. Access the “FILE” menu in the PC management software and choose “Check for Updates”. 2.
H8 DSP User’s manual 9 Digital Interface Processor 9.4 RESCUE MODE If, when launching the H8 DSP PC software the “H8 DSP Warning” window appears, the user can choose between the following two ways to proceed: A - Use a previous version of the PC software. E.g.: when using PC software v.1.0, open v.0.9; B - Update the H8 DSP firmware.
H8 DSP User’s manual 10 Digital Interface Processor 10. TECHNICAL SPECIFICATIONS POWER SUPPLY Operating power supply voltage Power supply Idling current Switched off without DRC Switched off with DRC Remote IN voltage Remote OUT voltage 10.8 ÷ 14.4 VDC 7.
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