NJU26125 Application Note PEQ Adjustment Procedure Manual New Japan Radio Co., Ltd

Transcription

1 NJU26125 Application Note PEQ Adjustment Procedure Manual New Japan Radio Co., Ltd Version 1.00

2 CONTENTS 1.ABSTRACT NJU26125 FIRMWARE BLOCK DIAGRAM EQUIPMENT ATTENTION GENERAL FLOW CHART SET UP OF MICROPHONE MESUREMENT SYSTEM ADJUSTMENT PROCESURE OUTPUT TRIMMER TO MASUREMENT OBJECT SPEAKER CONVERSION of PARAMTER FILE USAGE of PRESET in NJU26125 GUI PARAMETER CONVERSION TOOL PARAMETER CONVERSION FLOW CHART CONVERSION PROCESURE CONFIRMATION OF PRESET...23 CAUTION The products specifications and descriptions listed in this application note are subject to change at anytime without notice. The specifications on this application note are only given for information, without any guarantee as regards either mistakes or omissions. The application circuits in this application note are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. -1-

3 1.ABSTRACT The NJU26125 is a 24-bit audio DSP suited to car audio system with functions of surround, elevation bass enhance and all. The just acoustic adjustment produces the most suitable surround matched up to each seat position in four-speakers configuration of front and rear. The sufficient surround effect requires the adjustment of PEQ parameters matched up to each seat position. The customer adjusts PEQ parameters with this tool. This tool corrects automatically and easily the characteristic of speaker and amp fixed the automobile to flat or optional frequency characteristic This manual describes concretely the method to adjust PEQ parameters with automatic correction tool and the procedure to convert the adjustment values into NJU26125 PEQ commands. 2.NJU26125 FIRMWARE BLOCK DIAGRAM Figure 2.1 shows the NJU26125 firmware block diagram. The adjustment items are PEQ Blocks described in redline. Each PEQ Block has seven bands PEQ. The all bands allocate only PEQ, or five bands PEQ and tone control. This manual explains an example of five bands PEQ. L/R (SDI0) L/R (SDI1) Navigation Voice Signal (SDI2) Lch copy to Rch Bass Enhance Input Trim Input Trim Simulated Stereo * Front Elevation Rear Elevation Either Phase Shifter or Time Alignment is valid Front Surround Rear Surround Figure 2.1 NJU26125 firmware block diagram 3.EQUIPMENT The instruments are as follows: 1. PEQ automatic correction tool (AutoFit.exe) NJU26125 GUI (NJU26125.exe) 1 3. Conversion tool to NJU26125 PEQ commands (fitpeq26125.exe) 1 4. NJU2612x Built-in Board 1 5. DEMO I/F Board 1 6. PC with sound input and output 1 The operating system responses to Windows 2000,Windows XP, Windows Server 2003,Windows Vista. 7. Omni directional microphone with built-in amp / Omni directional microphone and amp 1 8. Audio cable for microphone and PC analog input 1 9. Audio cable (pin plug*2: stereo mini plug: 3mm) USB cable V AC Adapter or 5V cable and Power supply 1 4.ATTENTION The attentions are as follows: 1. Adjust in quiet ambience 2. Close car doors, car windows and car trunk 3. Turn off engine and air conditioner 4. Connect the demo board to in-vehicle amp exactly. 5. As soon as Measurement Start button in GUI of auto correction tool is clinked, go outside of the car immediately before the test signal is outputted. Phase * Shifter Time Alignment Phase * Shifter Time Alignment Time Alignment Surround Mix Surround Mix 7Band PEQ / 5Band PEQ +Tone Control 7Band PEQ / 5Band PEQ +Tone Control Mono Out (L+R)/2 HPF HPF LPF Channel Trimmer/Master Volume NaviMix Trim Front L/R (SDO0) Rear L/R (SDO1) Subwoofer L/R (SDO2) -2-

4 5.GENERAL FLOW CHART Figure 5.1 shows the general flow chart to adjust PEQ. The PEQ automatic correction tool generates eight PEQ parameter files. They are adjusted about Front-L, Front-R, Rear-L and Rear-R in the driver seat, in addition, Front-L, Front-R, Rear-L and Rear-R in the front seat. And then their files are converted into NJU26125 PEQ commands. Start The PEQ auto correction tool adjusts PEQ parameters of five bands to be flat the characteristic of Front-L speaker in the driver seat. Similarly, adjust the characteristics of Front-R, Rear-L and Rear-R. 1. Set up a microphone at the headrest of driver seat. (Figure5.2, Figure6.1, Figure6.2) 2. Output the test signal from only Front-L speaker and then adjust then the PEQ parameters to be flat the characteristic of Front-L speaker. Export the adjustment values as PEQ parameter file of Front-L. 3. Execute according to similar procedure in case of Front-R, Rear-L and Rear-R. The PEQ auto correction tool adjusts PEQ parameters of five bands to be flat the characteristic of Front-L speaker in the front seat. Similarly, adjust the characteristics of Front-R, Rear-L and Rear-R. 4. Set up a microphone at the middle point of front passenger seat and driver seat. (Figure5.3, Figure6.3, Figure6.4) 5. Output the test signal from only Front-L speaker and then the PEQ parameters are adjusted to be flat the characteristic of Front-L speaker. Export the adjustment values as PEQ parameter file of Front-L. 6. Execute according to similar procedure in case of Front-R, Rear-L and Rear-R. Convert the exported parameter files into NJU26125 PEQ commands. End Figure5.1 General flow chart Front-L Front-R Front-L Front-R Set up position Set up position Rear-L Rear-R Rear-L Rear-R Figure5.2 set up position of microphone in driver seat Figure5.3 set up position of microphone in front seat -3-

5 6.SET UP OF MICROPHONE Figure 6.1 and Figure 6.2 show the position of a microphone in the driver seat. The driver s wheel installs on right side because this automobile is Japanese specification. If the driver s seat is left side, set up a microphone at the headrest of the left side front seat. Figure 6.3 and Figure 6.4 show the position of a microphone in the front seat. Figure 6.1 set up position of microphone in driver seat Figure 6.3 set up position of microphone in front seat Figure 6.2 set up position of microphone in driver seat Figure 6.4 set up position of microphone in front seat -4-

6 7.MESUREMENT SYSTEM Figure 7.1 shows the measurement system. 5V J7 DEMO I/F Board APC NJU2612x Built-in Board APC USB U13 MPU I 2 C Line output J5 AIN0 SEL ADC Microphone input J4 AOUT0 NJM2753 AK5358 DAC AK4388 NJU26125 J3 AOUT1 DAC AK4388 In-vehicle amp Rear-L Microphone Rear-R Microphone amp Front-L Front-R Figure7.1 measurement system Figure 7.2 shows the hardwiring of demo board. NJU26125 GUI PEQ automatic correction tool Microphone amp Demo I/F Board NJU2612x Built-in Board Microphone input Demo board U13 J7 J5 Line output J3 J4 Figure7.2 Hardwiring to demo board -5-

7 8.ADJUSTMENT PROCESURE The PEQ auto correction tool adjusts five bands PEQ parameters to be flat the characteristic of Front-L, Front-R, Rear-L and Rear-R in the driver seat and then export the adjustment values as PEQ parameter file. This chapter describes the procedure to adjust PEQ and export the adjusted parameters in Front-L speaker 1.Copy PEQ automatic correction tool and NJU26125 GUI to local disk of customer s PC. 2.Set up the microphone to measure speaker characteristic. (Figure 6.1 and Figure 6.2) Connect NJU26125 Demo Board to the in-vehicle amp. (Figure 7.1 and Figure 7.2) 3.Execute NJU26125 GUI. (Figure8.1) Figure 8.1 Startup screen of NJU26125 GUI -6-

8 4.Select USB-FX1 from pull down menu of Port Device. And then the indication of status will change from Push the connect button to Connected. Moreover the background color of status will change from light blue to green. This shows that the communications between DSP and PC are valid. (Figure8.2 -A) Figure8.2-B Figure8.2-C Figure 8.2-A Figure 8.2 Valid communications between DSP and PC 5. Check that all signal process functions are disabled. (Figure 8.2-B) And then check that Master volume is set to mute. (Figure8.2-C) -7-

9 6.Click Trim tab and then trim control will be displayed. (Figure8.3-A) Set all output trimmers except front left to mute. (Figure8.3-B) Because the test signal is stereo and then the adjustment uses the sound outputted from the only front left-speaker Set the Input Trim to 12dB under consideration of PEQ adjustment. (Figure8.3-C) Figure 8.3-A Figure 8.3-C Figure 8.3-B Figure 8.3 Volume adjustments 7.Check that SIN_SWEEP.WAV exists in the WAVE folder. This wave file is the sound source for the measurement. If this file doesn t exist in the wave folder, it is impossible to use the measurement function of this tool. Accordingly, copy all folders to the local disk. 8. Execute AutoFit.exe.(Figure 8.4) Figure8.4 Startup display of PEQ automatic correction tool -8-

10 9.Click Device setting tab and then control screen of Device setting will be displayed. (Figure8.5-A) Select the correspond device from pull down menu. (Figure 8.5-B) Set the slider bars of Master, Master out and Wave in at the maximum.(figure8.5-c) Figure8.5-B Figure8.5-C Figure8.5-A Figure 8.5 Control screen of Device setting 10.Select Wave Form of Main View Select.. (Figure8.6-A) Figure 8.6-A Figure 8.6-B Figure 8.6 Wave Form screen 11.Click Play Test Sound button and then the test signal will be outputted. (Figure 8.6-B) -9-

11 12.Turn up the master volume gradually and then adjust the proper magnitude of sound. (Figure 8.2-C) This tool displays the peak level and RMS value of the input signal. The rough standards show that the peak level is about -6dB and RMS value is about 20dB. If the values aren t extremely lower than the rough standards, the microphone level has no effect on the measurement. (Figure8.7-A) Figure 8.8 shows the Clipping waveform. Figure 8.9 shows the magnification of clipping point. If the magnitude of sound finishes to adjust, click Stop Test sound button to suspend the test signal. (Figure8.7-B) And then select Freq Response of Main View Select and frequency response will be displayed. (Figure8.7-C) Figure 8.7-C Figure8.7-B Figure8.7-A Figure 8.7 Adjust magnitude of sound in the test signal magnification The monitor shows that Peak amplitude is 0dB. Figure8.8 Clipping waveform Click at the position around the clipping waveform. And then scale-up or scale-down by scrolling mouse wheel. Figure8.9 magnification of clipping point -10-

12 13.Click Measurement Start button, and then this tool will output the test signal and start to measure speaker characteristic automatically. (Figure 8.10) Figure8.10 Automatic measurement of speaker characteristic The progress bar indicates process during measurement. (Figure 8.11) Figure8.11 Indication during measurement If the tool finishes to play the test signal and the progress bar disappear automatically, the measurement will have finished. (Figure8.12) The gray line indicates background noise. If the background noise level is higher than the measurement result or affects the frequency response, Set the check box indicated Noise Cancel. And then the tool will remove the background noise from the measurement result. Set the check box indicated Noise Cancel Figure8.12 Measurement result -11-

13 14.Set the check box indicated Measurement result. Unset the check boxes except Measurement result because the measurement result enables to be fairly visible. (Figure8.13) Set Unset Figure8.13 Speaker characteristic 15.Click Measurement preset tab to save speaker characteristic, and then measurement preset will be displayed. (Figure8.14-A) Figure8.14-A Figure8.14-B Figure8.14-C Figure8.14 Measurement Preset -12-

14 Click Save Measurement button (Figure8.14-C), and then Save Measurement Result Plot data file will be displayed. (Figure8.15) Figure8.15 Save Measurement Result Plot data file Assign the location to save the result and describe the file name, and then click Save button. (Figure8.16-A) The following example shows to save as driver-front-l. (Figure8.16-B) Figure8.16-B Figure8.16-A Figure8.16 Save of measurement result If the customer loads the measurement result, click Load Measurement, and load Measurement load data file will be displayed. Assign the location to load and select the file.(figure8.14-b) -13-

15 16.Click Target setting tab to confirm a target characteristic, and then the control screen of Target setting will be displayed. (Figure8.17) Figure8.17 Control screen of Target setting Set the check box indicated Target curve, and then the target curve will be displayed. (Figure8.18-A) Confirm that the curve is flat. If it is not flat, click Flat button, and then the target curve will be flat. (Figure8.18-B) The blue line indicates the target curve. Figure8.18-B Figure8.18-A Figure 8.18 Confirm of target curve -14-

16 17.Click Correction setting tab, and then control screen of Correction setting will be displayed. (Figure 8.19) Set frequency range according to speaker characteristic. Figure8.19-A shows that the frequency range is from 100Hz to.10khz. NJU26125 has seven bands PEQ, and five bands of all are assigned to PEQ and then the others are assigned to tone control. Certainly all bands enable to be assigned to PEQ. Figure8.19-B shows that the number of bands is set to five. Adjust Precision of correction to approximate the target curve. Figure 8.19-C shows that Precision of Figure8.19-A Figure8.19-B correction is set to ten. Set the check boxes indicated, Measurement result, Correction Figure8.19-C result, Target curve and PEQ plot and then these figures will be Figure8.19-D displayed together. (Figure8.19-D) Figure8.19 Correction setting Green: Measurement result Red: Correction result White: PEQ plot Figure8.20-B Blue: Target curve Figure8.20-A 18.Click Correction Start button and then this tool will adjust parameters of PEQ automatically to get the speaker characteristic flat. (Figure8.20-A) The maximum gain and frequency of PEQ are displayed at the upper right corner. (Figure8.20-B) Figure8.20-B shows that the maximum gain is dB at 10,024Hz.Accordingly the input trimmer needs to lower 12dB at least to prevent the clipping distortion. The present input trimmer is set to 12dB. (Figure 8.3-C) Figure8.20 Correction result If the proper correction result isn t gotten well, reconsider frequency range and then adjust PEQ parameters again. The other adjustment ways are as follows: 18-1.The ways to drag a setting point of PEQ manually 18-2.The ways to fine-tune the automatic correction result 18-3.The ways to adjust semiautomatic correction of PEQ Execute automatic correction Click the check box indicated Manually FO Setup mode. Reconsider frequency by dragging the adjusted PEQ point Click Correction Start button. In this mode, the customer enable to adjust Q and Gain without changing the reconsidered frequency. -15-

17 19.Click PEQ Export/Import tab to export PEQ parameters and then the control screen of PEQ Export /Import will be displayed. (Figure8.21) Figure8.21 PEQ Export/Import Click Export Command list button, and then Export PEQ command list will be displayed. (Figure 8.22) Figure 8.22 Export PEQ command list Assign the location to save the result and describe the file name, and then click Save button. (Figure8.23-A) The following example shows to save as driver-front-l. (Figure8.23-B) Figure 8.23-B Figure 8.23-A Figure8.23 Save of correction result This chapter describes the procedure to export the adjustment values as the parameter file of front-l in the driver s seat. In the same procedure, generate the other s parameter files. -16-

18 9.OUTPUT TRIMMER TO MASUREMENT OBJECT SPEAKER This chapter shows the output trimmers to the measurement object speaker. (Figure ) PEQ adjustment of the front-l speaker PEQ adjustment of the front-r speaker Figure9.1 Output trimmer setting in the front-l speaker PEQ adjustment of the rear-l speaker Figure9.2 Output trimmer setting in the front-r speaker PEQ adjustment of the rear-r speaker Figure9.3 Output trimmer setting in the rear-l speaker Figure9.4 Output trimmer setting in the Rear-R speaker -17-

19 10.CONVERSION of PARAMTER FILE This chapter describes the procedure to convert the adjustment values exported by the correction tool into NJU26125 PEQ commands USAGE of PRESET in NJU26125 GUI NJU26125 has ten presets, and then the file named NJU26125.ini describes the parameters of each function. Figure 10.1-A shows the preset number assigns to each seat position, and the acoustic adjustment is operated according to seat position. Figure10.1-B Figure10.1-A 1(def): Bypass 2: Driver 3: Front 4: Rear 5: All 6: not use 7: not use 8: not use 9: not use 10: not use Description of comment Figure10.1-B Figure10.1 Assignment preset number corresponded to the seat position After NJU26125 GUI executes, and then when the GUI starts to communicate with NJU26125, the GUI operates as initial parameter indicated Preset1 (def). Each tab (Main, Trim, Bass Enhance/Elevation, Car Surround, Phase Shifter/Time Alignment, PEQ Front, PEQ Rear, Other, System, All Tabs, All Tabs-Main) selected from pull down menu enable to load and save parameters corresponded to preset number. (Figure10.1-B) -18-

20 10.2.PARAMETER CONVERSION TOOL The parameter conversion tool imports the file exported by auto correction tool and then converts into NJU26125 PEQ commands. This tool updates NJU26125.ini corresponded to the assigned preset number with the conversion results PARAMETER CONVERSION FLOW CHART Figure10.2 shows the conversion flow chart of parameter files. Start Preset2 is assigned to driver seat Prepare PEQ parameter files exported by auto correction tool. These are the adjusted results with the microphone attached the driver seat Update parameters (Front-L) of NJU26125.ini-file corresponded to preset2. Show to chapter Update parameters (Front-R) of NJU26125.ini-file corresponded to preset2. Update parameters (Rear-L) of NJU26125.ini-file corresponded to preset2. Update parameters (Rear-R) of NJU26125.ini-file corresponded to preset2. Preset3 is assigned to front seat Prepare PEQ parameter files exported by auto correction tool. These are the adjusted results with the microphone attached at the middle point of front seats Update parameters (Front-L) of NJU26125.ini-file corresponded to preset3. Update parameters (Front-R) of NJU26125.ini-file corresponded to preset3. Update parameters (Rear-L) of NJU26125.ini-file corresponded to preset3. Update parameters (Rear-R) of NJU26125.ini-file corresponded to preset3. Set preset4 and preset5 to be the same as front seat (preset3). Preset4 is assigned to rear seat. Preset5 is assigned to all seats. End Figure 10.2 Conversion flow charter of parameter files -19-

21 10.4.CONVERSION PROCESURE This chapter shows the procedure to convert the parameter file into NJU26125 PEQ commands. As an example, this explains how to convert the parameter file exported by auto correction tool in the driver seat. 1. At first, locate the following files at the same folder NJJ26125.ini parameter setting file 1-2. Parameter files exported by auto correction tool (eight files referred to Table 10.1) 1-3. fitpeq26125.exe parameter conversion tool 2.Double-click firpeq26125.exe to execute the parameter conversion tool. (Figure10.3) Figure 10.3 Startup screen of ftirpeq26125.exe 3.This tool inquires, PEQ Export File Name. Therefore, drag & drop driver-front-l.txt on startup screen. (Figure 10.4) This file is PEQ parameter file of Front-L in the driver seat. Figure10.4 Screen of input file -20-

22 4. After drag and drop of the file, input Enter key. And then tool requires, Preset Number? (1-10): (Figure10.5) Figure10.5 Inquire Preset Number 5. Because this file is the parameter for the driver seat, input 2 key and then Enter. And then tool requires, Speaker channel? (1=Front Lch, 2=Front Rch, 3=Rear Lch, 4=Rear Rch): Figure10.6 Inquire speaker channel 6. Because this input file is the parameter for front-l, input 1 key and then Enter. If NJU26125.ini finishes to update, the screen of this tool will be close automatically. 7.Update NJU26125.ini about the other s parameter files in the same procedure. -21-

23 The parameter files exported with auto correction tool are shown in Table10.1. Exported file Adjusted values Exported file Adjusted values driver-front-l.txt # NJU26123 PEQ CONFIG COMMAND front-front-l.txt # NJU26123 PEQ CONFIG COMMAND # BAND00 fo = 100Hz, gain = -12.0, q = 1.80 # BAND00 fo = 199Hz, gain = -12.0, q = xD6, 0x01, 0x0E, 0x07, 0x38 0xD6, 0x01, 0x14, 0x0E, 0x38 # BAND01 fo = 158Hz, gain = -5.0, q = 8.20 # BAND01 fo = 630Hz, gain = -5.5, q = xD6, 0x02, 0x12, 0x0F, 0x2A 0xD6, 0x02, 0x1E, 0x0E, 0x2B # BAND02 fo = 707Hz, gain = -5.0, q = 1.80 # BAND02 fo = 446Hz, gain = +6.5, q = xD6, 0x03, 0x1F, 0x07, 0x2A # BAND03 fo = 5623Hz, gain = -8.0, q = xD6, 0x04, 0x31, 0x07, 0x30 0xD6, 0x03, 0x1B, 0x0F, 0x0D # BAND03 fo = 4466Hz, gain = -4.5, q = xD6, 0x04, 0x2F, 0x00, 0x29 # BAND04 fo = 354Hz, gain = +12.0, q = 8.20 # BAND04 fo = 398Hz, gain = +11.0, q = xD6, 0x05, 0x19, 0x0F, 0x18 0xD6, 0x05, 0x1A, 0x0F, 0x16 driver -front-r.txt driver -rear-l.txt driver -rear-r.txt # NJU26123 PEQ CONFIG COMMAND # BAND00 fo = 199Hz, gain = -11.0, q = xD6, 0x01, 0x14, 0x05, 0x36 # BAND01 fo = 125Hz, gain = +4.5, q = xD6, 0x02, 0x10, 0x0F, 0x09 # BAND02 fo = 891Hz, gain = -4.5, q = xD6, 0x03, 0x21, 0x0E, 0x29 # BAND03 fo = 5623Hz, gain = -5.5, q = xD6, 0x04, 0x31, 0x07, 0x2B # BAND04 fo = 398Hz, gain = +6.0, q = xD6, 0x05, 0x1A, 0x0D, 0x0C # NJU26123 PEQ CONFIG COMMAND # BAND00 fo = 112Hz, gain = -12.0, q = xD6, 0x01, 0x0F, 0x03, 0x38 # BAND01 fo = 125Hz, gain = -12.0, q = xD6, 0x02, 0x10, 0x0B, 0x38 # BAND02 fo = 1258Hz, gain = -8.0, q = xD6, 0x03, 0x24, 0x0B, 0x30 # BAND03 fo = 5011Hz, gain = -5.0, q = xD6, 0x04, 0x30, 0x07, 0x2A # BAND04 fo = 10000Hz, gain = +12.0, q = xD6, 0x05, 0x36, 0x0F, 0x18 # NJU26123 PEQ CONFIG COMMAND # BAND00 fo = 141Hz, gain = -12.0, q = xD6, 0x01, 0x11, 0x03, 0x38 # BAND01 fo = 141Hz, gain = -7.5, q = xD6, 0x02, 0x11, 0x0A, 0x2F # BAND02 fo = 1122Hz, gain = -11.0, q = xD6, 0x03, 0x23, 0x0D, 0x36 # BAND03 fo = 446Hz, gain = +9.5, q = xD6, 0x04, 0x1B, 0x0F, 0x13 # BAND04 fo = 10000Hz, gain = +9.0, q = xD6, 0x05, 0x36, 0x0E, 0x12 front-front-r.txt front-rear-l.txt front-rear-r.txt Table10.1 Adjusted parameter table of each speaker # NJU26123 PEQ CONFIG COMMAND # BAND00 fo = 100Hz, gain = -6.0, q = xD6, 0x01, 0x0E, 0x0D, 0x2C # BAND01 fo = 223Hz, gain = -12.0, q = xD6, 0x02, 0x15, 0x0C, 0x38 # BAND02 fo = 3162Hz, gain = -4.0, q = xD6, 0x03, 0x2C, 0x00, 0x28 # BAND03 fo = 446Hz, gain = +9.5, q = xD6, 0x04, 0x1B, 0x0F, 0x13 # BAND04 fo = 2511Hz, gain = +7.5, q = xD6, 0x05, 0x2A, 0x0F, 0x0F # NJU26123 PEQ CONFIG COMMAND # BAND00 fo = 112Hz, gain = -8.5, q = xD6, 0x01, 0x0F, 0x0E, 0x31 # BAND01 fo = 177Hz, gain = -10.0, q = xD6, 0x02, 0x13, 0x02, 0x34 # BAND02 fo = 177Hz, gain = +3.0, q = xD6, 0x03, 0x13, 0x0D, 0x06 # BAND03 fo = 223Hz, gain = -6.0, q = xD6, 0x04, 0x15, 0x0F, 0x2C # BAND04 fo = 501Hz, gain = +11.0, q = xD6, 0x05, 0x1C, 0x0E, 0x16 # NJU26123 PEQ CONFIG COMMAND # BAND00 fo = 177Hz, gain = -10.0, q = xD6, 0x01, 0x13, 0x03, 0x34 # BAND01 fo = 1584Hz, gain = -3.5, q = xD6, 0x02, 0x26, 0x07, 0x27 # BAND02 fo = 4466Hz, gain = -6.0, q = xD6, 0x03, 0x2F, 0x0A, 0x2C # BAND03 fo = 10000Hz, gain = +9.0, q = xD6, 0x04, 0x36, 0x0D, 0x12 # BAND04 fo = 501Hz, gain = +9.5, q = xD6, 0x05, 0x1C, 0x0E, 0x13-22-

24 10.5.CONFIRMATION OF PRESET 1.Execute NJU26125 GUI and select USB FX1 from pull down menu. And then the GUI will be confirmed to communicate with the NJU (Figure10.7-A) Figure10.7-A Figure10.7-B Figure 10.7 Ready to communicate with NJU26125 Figure10.8-B Figure10.8-C 2.Select All Tabs from pull down menu (Figure10.7-B). Click the radio button of Parameter Memory (Preset2: Driver). (Figure10.8-A) Click PEQ Front tab, and then the screen of PEQ front characteristic will be displayed. (Figure10.8-B) If PEQ Rear tab is clicked, PEQ characteristic of rear is displayed. (Figure10.8-C) Confirm that these parameters are the same as the values of driver-front-l.txt. (Refer to Table10.1) These parameters are the same as the values of driver-front-r.txt. Figure10.8-A Figure 10.8 PEQ Front-L characteristic in the driver seat -23-

25 3.Click the radio button of Parameter Memory (Preset3: Front). (Figure10.9-A) If PEQ Rear tab is clicked, PEQ characteristic of rear is displayed. (Figure10.9-B) Figure10.9-B Confirm that these parameters are the same as the values of front-front-l.txt. (Refer to Table10.1) These parameters are the same as the values of front-front-r.txt. Figure10.9-A Figure 10.9 PEQ Front-L characteristic in the front seat 4.The same parameters are applied in the front seat, rear seat and all seats. Therefore this shows how to save PEQ parameters of front seat to Preset4 and Preset5. (Figure10.10) Confirm that All tabs is selected. (Figure A) Click the button indicated save to preset3 (Front) to Preset4 (Rear), and then the button will be drew in and be light gray. (Figure10.10-B) Figure10.10-B Figure10.10-A Figure10.10-C Figure10.10 How to save to preset -24-

26 5.Click the radio button of Parameter Memory (Preset4: Rear), and then the confirmation to overwrite will be displayed. (Figure10.10-C, Figure10.11) Figure Confirmation to overwrite 6.Click OK and therefore Preset4 has saved the same parameters as preset3. 7. In the same procedure, overwrite Parameter Memory (Preset5: All). Click the button of SAVE and then click the radio button of Preset5. When confirmation to overwrite is displayed, click OK. The parameters has finished to overwrite to Preset5 The PEQ parameters exported with auto correction tool have set PEQ parameter corresponded to preset number of NJU26125 GUI. The acoustic adjustment is ready. NJRC recommends to backup these parameter files and NJU26125.ini. -25-