KLIPPEL KCS User manual

Klippel GmbH Controlled Sound Goal of this Guide
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KCS SYSTEM USER’S GUIDE
KCS Evaluation Tutorials
July 08, 2021
Copyright © 2000-2019 Klippel GmbH
Mendelssohnallee 30, 01309 Dresden, Germany
[e-mail]
www.klippel.de

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Goal of this Guide Klippel GmbH Controlled Sound
Contents
1Goal of this Guide .................................................................................................. 3
2Requirements ........................................................................................................ 3
3Hardware Setup..................................................................................................... 4
3.1 KCS running on Nuvoton Platform (NAD)........................................................................... 5
3.2 KCS running on Klippel Devices .......................................................................................... 6
4Software Setup ...................................................................................................... 8
5Tutorial 1 –Check Setup....................................................................................... 12
6Tutorial 2 –Measuring the Frequency Response................................................... 13
7Tutorial 3 –Active Speaker Evaluation.................................................................. 14
8Tutorial 4 –Evaluate Mechanical Protection System............................................. 17
9Tutorial 5 –Multi-Tone Distortion........................................................................ 20
10 How to Treat Rub+Buzz Issues.............................................................................. 22

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1Goal of this Guide
This document describes how to evaluate the KLIPPEL Controlled Sound technology (KCS) by using the
KLIPPEL QC measurement framework. The following topics are covered:
•Measuring the frequency response
•Evaluation of the performance of active systems including KCS in the large signal domain
•Evaluation of the KCS speaker protection
•Evaluation of multi-tone distortion compensation
•How to treat Rub&Buzz problems
2Requirements
Its mandatory to read the document Manual KCS Monitor.pdf which teaches necessary KCS
basic knowledge before the KCS evaluation tutorials are executed!
Hardware:
•KCS hardware platform (e.g. Nuvoton Audio Development Board (NAD), Klippel Analyzer 3
(KA3), APE Evaluation Board etc.)
•Measurement Equipment. There are two options:
oKA3 measurement device:
▪Klippel Analyzer 3 (KA3)
▪Microphone
oNAD on-board microphone (DMIC):
▪Klippel Dongle
▪DMIC module mounted on NAD board
Software:
•Klippel dB-Lab of version >= 210.826
•Licenses for: QC Standard 6 for KCS, SPL task, Multi-tone distortion task, SYN, 3DL
•Additional License (only for QC measurement with NAD board DMIC): QC no PA hardware
required (== QC Standalone)
In addition, following Klippel dB-Lab operations are required:
•KCS Monitor operation comprising initial data for the particular DUT
•QC operation template KCS Evaluation Template.kdbx

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Hardware Setup Klippel GmbH Controlled Sound
3Hardware Setup
There are different hardware setups dependent on the device on which KCS is running (KCS device)
and what device is used as input device for the QC measurement (QC measurement device). Details
about specific hardware setups applicable for your particular application are listed in the chapters
below.
KCS device
QC meas-
urement
device
Related hardware setup chapter
Nuvoton Plat-
form (NAD)
Klippel KA3
3.1 KCS running on Nuvoton Platform (NAD)
Hardware Connection using KA3 as QC Input Device
Nuvoton Plat-
form (NAD)
NAD DMIC
(= NAD
onboard mic)
3.1 KCS running on Nuvoton Platform (NAD)
Hardware Connection using NAD DMIC as QC Input Device
Klippel KA3
(using internal
AmpCard)
Klippel KA3
3.2 KCS running on Klippel Devices
Hardware Connection using KA3 with AMP Card
Klippel KA3
(using an ex-
ternal Amp)
Klippel KA3
3.2 KCS running on Klippel Devices
Hardware Connection using KA3 with external Amplifier
Klippel APE
EVB
(standalone
evaluation
board)
Klippel KA3
3.2 KCS running on Klippel Devices
Hardware Connection using APE Evaluation Board

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3.1 KCS running on Nuvoton Platform (NAD)
General System Overview
Transducer
Amplifier
u(t)
i(t)
Enclosure
KCS
firmware
KCS Monitor
NAD Eval Platform
Sound
enhancement
QC System
Microphone
PC
Nuvoton A6
Tuning Tool
stimulus output sound pressure signal input
KLIPPEL dB-Lab
control control & diagnostics
Figure 1: Schematic Diagram of Evaluation Environment using NAD board
Hardware Connection using KA3 as QC Input Device
Klippel KA3
Microphone
NAD Eval Platform USB
Left Audio
Channel Right Audio Channel
+
-
+
-
Transducer
Enclosure
Distance approx. 5-10cm
NAU 83G20 => 12V(DC)
NAU83G10 => 5V(DC)
Figure 2:Hardware Connection using NAD board and KA3

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Hardware Setup Klippel GmbH Controlled Sound
Hardware Connection using NAD DMIC as QC Input Device
DMIC
Transducer
Enclosure
KLIPPEL
Dongl e12345
KLIPPEL Dongle
Distance approx. 5-10cm
USB
Left Audio
Channel Right Audio Channel
+
-
+
-
NAD Eval Platform
Bottom side of circuit board
(with small hole) pointing to
speaker as shown on right-
hand side
NAU 83G20 => 12V(DC)
NAU83G10 => 5V(DC)
Figure 3:Hardware Connection using NAD board with DMIC
3.2 KCS running on Klippel Devices
General System Overview
Transducer
Amplifier
u(t)
i(t)
Enclosure
KCS
firmware
KCS Monitor
KA3
QC System
Microphone
PC
stimulus output sound pressure signal input
KLIPPEL dB-Lab
control & diagnostics
Figure 4: Schematic Diagram of Evaluation Environment

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Hardware Connection using KA3 with AMP Card
Klippel KA3
Microphone
Transducer
Enclosure
Distance approx. 5-10cm
Figure 5: Hardware Connection using KA3 with AMP Card
Hardware Connection using KA3 with external Amplifier
Klippel KA3
Microphone
Transducer
Enclosure
Distance approx. 5-10cm
AM P
InputOutput
External amplifier
Figure 6: Hardware Connection using KA3 with external amp

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Software Setup Klippel GmbH Controlled Sound
Hardware Connection using APE Evaluation Board
PC:
• KCS Monitor
• QC-Software
APE EVB
IN2
IN1
POWER
USB OUT1
OUT2
Audio Weaver®
KCS
Speaker
KA3
Microphone
Distance approx. 5-10cm
Figure 7: Hardware Connection using APE EVB
4Software Setup
1. (only applicable for Nuvoton device): Ensure that the Nuvoton Audio Development Platform
(NAD) is configured as active output device in Windows sound settings. Make sure the output
is unmuted and the volume level is set to 100%.
2. (only applicable for QC measurement with NAD board DMIC): Ensure that the NAD board is
configured as active input device in Windows sound settings. Make sure the input is un-
muted and volume level is set to 100%.

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3. If Klippel QC is used the first time, a microphone calibration needs to be performed by starting
dB-Lab and performing following steps:
a. KA3 used as QC input device
(1) Select in Menu: Hardware -> KA3 -> Amp Calibration for QC Operations
(2) Push button Calibrate Sensor in displayed pop-up
b. NAD board DMIC used as QC input device
(1) Select in Menu: Hardware -> 3rd party audio device -> Device Calibration for
QC Operations
(2) Push button Calibrate Sensor in displayed pop-up
(3) Push button Configure Hardware in property page of QC calibration operation
(4) Deactivate “Use Default Device” and Select DS: Default Playback and DS: De-
fault Capture as QC output respectively QC input device. Leave other settings
unchanged and confirm configuration with button OK.
(5) Login to QC operation ( )
4. Open the property page of the calibration operation for further steps of microphone calibra-
tion. Select Task Microphone/Sensor Calibration, assign a Sensor name, configure Type Micro-
phone and enter MIC1 - Sensitivity and MIC1 –Max Level (peak) from the specification of the
used microphone. (On using NAD board DMIC: Sensitivity = -42dBFS & Max Level (peak) = 125
dB)
Close the property page. Then press in result window Control Panel, wait
until calibration is performed successfully. Push button Save to store the calibration data un-
der a desired name and close this instance of dB-Lab.

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Software Setup Klippel GmbH Controlled Sound
5. Open the database KCS Evaluation Template.kdbx in dB-Lab (dB-Lab instance further called
db-Lab-QC)
6. Configure the global inputs and outputs to be used for QC measurement by performing fol-
lowing steps dependent on the used QC measurement hardware:
a. KA3 used as QC input device
(1) Select in Menu: Hardware -> KA3 -> Signal Configuration
(2) Set Mic Input in Section QC to Laser Card: IN 3,4 (IEPE)
(3) Configure Output in Section RnD + QC to XLR Card: OUT 1,2
(4) Push button Select Sensors… at input field Mic 1 Sensor and select the calibration
file which contains the sensor name given during recently performed calibration
process
(5) Close dialog
b. NAD board DMIC used as QC input device
(1) Select in Menu: Hardware -> 3rd party audio device -> Select Sensors
(2) Select DS: Default Capture in drop-down list Device
(3) Deactivate option Use Default Settings for This Device
(4) Mark Channel 01 by left mouse button click
(5) Push button Select Sensors and select the calibration file which contains the sen-
sor name given during recently performed calibration process
(6) Close dialog