Upgrade EASERA -> EASERA Pro

Version 1.2
Upgrade EASERA -> EASERA Pro

AFMG® offers two different versions of EASERA - EASERA and EASERA Pro - and different modules for users to choose. Please have a look at the Features and Version Comparison below to determine which version and possibly which module is the right choice for your needs.

  • Program for measurement and analysis of electronical and acoustical systems
  • 32 channels with sampling rates from 8 kHz to 192 kHz
  • For all acoustical parameters according to ISO 3382...
    • Impulse response,
    • Frequency response,
    • Reverberation time RT, T10, T20, T30,
    • Clarity C7, C50, C80, etc.,
    • Intelligibility STI und AlCons
  • Many different exitement signals to choose from...
    • White, logarithmical (pink) and weighted sweeps,
    • Sine-, impuls- and step-signals,
    • White, pink and weighted noise signals
  • MLS module included
  • In-situ measurements for data acquisition and external post-processing of absorption & reflection coefficients
  • External sources and recordings
  • Live sound RTA displayed as diagram or spectrometry
  • 2 channel FFT analysis
  • Drivers for Windows Direct Sound, Wave/MME, and ASIO Audio
Version Comparison

Feature / Version EASERA EASERA PRO MLS Module* POLARS Module** TEF/TDS Module
Number of channels 2 32      
Sample rate 8 kHz - 48 kHz 8 kHz - 192 kHz      
Reverberation Time (T10, T20, T30)      
Signal to Noise Ratio (SNR)      
Speech Transmission Index (STI)
According to IEC 60268-16:2020
Articulation Loss of Consonants (% AlCons)      
Common Intelligibility Scale (CIS)      
Sound pressure level (SPL) in real time
Including: A-, B-, C- and Z-weightings for SPL; and visualization of peak and RMS values for both
Voltage measurements in real time      
Signal generator with typical stimuli
Sweep, Log-Sweep, Weighted Sweep, Pink Noise, White Noise, Sine, Weighted Noise
Waterfall plot      
Calibration of in- and outputs
For acoustic and electronic measurements
Real time measurements
Spectrum, spectrogram, basic transfer function
Early Decay Time (EDT)      
Center Time (ts)      
Clarities (C50, C80)
User-defined energy ratios
User-defined integration times
Interaural Cross-Correlation Coeff. (IACC) ***      
Energy sum
Forward integration
Reflection Index / Reflection Factor
in-situ measurement of material properties
Sound Strength (G)      
Relative Strength (Grel)      
Feature / Version EASERA EASERA PRO MLS Module* POLARS Module** TEF/TDS Module
Statistical properties of single measurements
Signal mean (DC), noise mean (DC), signal effective value (RMS), crest factor, absolute maximum amplitude...
Filter functions
Low pass, high pass, band pass filters with Butterworth, Chebychev I and Chebychev II characteristics
Window functions
Hanning, Hamming, Blackman, Rectangle, Triangle, Kaiser window types
Basic editing
Averaging Measurement Files, Adding Measurement Files, Cyclic Move, Undo/Redo, Copy/Paste
Phase spectrum
Includes group delay, real and imaginary parts
Noise Criteria (NC, PNC, NR)      
Viewing and processing of multiple measurements      
Impedance measurements ***      
Impulse Response to Noise Ratio (INR)      
Definition (D)      
Echo Criteria      
Lateral Fraction (LF) ***      
Latefal Fraction Coefficient (LFC) ***      
Support (ST1 and ST2)      
Modulation Transfer Index (MTI) and Modulation Transfer Function (MTF)      
Various display units
V, dBV, dBu, dBm, dBW, dBSPL, etc.
Feature / Version EASERA EASERA PRO MLS Module* POLARS Module** TEF/TDS Module
User-defined measurement signals
Convert almost any signal to an EASERA stimulus, e.g. WAV files
Automated post processing with editing sequences
Apply a number of editing operations automatically
Advanced editing including mathematical transformations
Remove DC, Set To Value, Add Value, Subtract Value, Multiply By Value, Divide By Value, Scale To, Square, Square Root, Inverse, Power, Custom Smoothing, Expand/Shrink, Change Length, Divide, Subtract...
Harmonic spectra (K2, K3, ...)        
Total Harmonic Distortion (THD)        
Scale model measurements
Using adequate high-frequency measurement setup, EASERA allows to remove air absorption and change sample rates according to ISO 9613
Tolerance mode to detect sound events and save them to a file automatically        
Measurements with MLS excitation signals
Hadamard transformation
3D directional measurements
Using adequate measurement setup, for loudspeakers, microphones, etc.
Automated measurements
Support for measuring robots and turntables, such as Four Audio ELF robot, LinearX LT360, Outline ET2 and Outline ET250-3D turntables
TDS measurements - Time Delay Spectrometry        

* The MLS module is included within EASERA Pro.         

** The POLARS module can be combined with EASERA Pro.

*** Using adequate microphone setup.    


Upgrade EASERA -> EASERA Pro


Upgrade EASERA -> EASERA Pro

1 User Key for an existing license ID

1.350 EUR (net)


Purchase Options

AFMG® distributes its software directly, worldwide, and in some countries with the support of international distributors. Various purchase options are available:


By clicking the Add to Cart button in the price list below you will be transferred to the AFMG Online Store.


To request written quotes or for any sales-related questions please contact us directly.


If you are looking for pre-sales support in your language or local purchasing options, please check our Distributor´s Network.


Educational institutions can apply for special Educational or Research License Offers.

Upgrade Note

If you purchase an upgrade or module for only a subset of User Keys, we will split your license. Your existing license will remain with a reduced number of User Keys. You will receive an additional new license with the new feature scope for the respective number of User Keys.

General Terms and Conditions

English | Deutsch

General Terms and Conditions of AFMG Technologies GmbH

1. Scope

1.1   The following Terms and Conditions apply to all contracts of AFMG Technologies GmbH (“Software Developer”) relating to sales, maintenance, installation and other services. They also take precedence over any conflicting terms and conditions of the customer, except where the validity of the latter has been expressly approved.

1.2   Separate contracts, each independent of the other, shall be drawn up regulating the production of software, the provision of coaching and training, support and maintenance for the software, and other services.

1.3   Business relations are entered into only with companies, legal entities incorporated under public law or specialised entities subject to public law. Business dealings are not entered into with customers - natural persons - who are not self-employed or otherwise trading on their own account.

2. Conclusion of contract

2.1   Orders via the online shop of the software developer located at http://store.afmg.eu are placed in the following way: The customer may initiate a purchasing contract covering the items in his shopping trolley by clicking “Pay Now”. This is only possible, however, if he has first accepted these Terms and Conditions by clicking “Accept Terms and Conditions”, thereby linking the Terms to his order. The confirmation of receipt, which AFMG will send immediately and which will contain all the details of the order, does not imply acceptance of the initiated purchasing contract. The purchasing contract is deemed entered into when AFMG dispatches the ordered goods and confirms the dispatch in writing.

2.2   In respect of other services offered by the software developer, including products available through channels other than the online shop, a contract is not deemed entered into until the customer has countersigned the confirmation of contract, the wording of which determines the substance of the contract.

3. Scope of software contracts; licensing conditions

3.1   The software developer will provide the customer with a copy of the purchased software by email or FTP or as a download from the internet address http://downloads.afmg.eu and also with the relevant electronic manual as a PDF, HTML or DOC document. These are intended exclusively for the personal use of the customer. The software developer retains all copyright, in particular rights to all recordings and documentation.

3.2   The customer may also order a duplicate CD for back-up or archiving purposes or for the identification of defects. The replication of recordings or documentation is prohibited.

3.3   The customer must take the necessary measures to prevent third parties from gaining unauthorised access to the software. He must store the software in a secure location that precludes such access. The customer’s employees and colleagues are to be familiarised with the terms of this contract and with the software developer’s ownership of copyright.

3.4   Barring agreements to the contrary, this contract does not cover installation of the software supplied by the software developer.

3.5   The customer may only use a copy of the software on a single computer. Where the customer purchases a multiple-use version, he may use the agreed number of copies on the appropriate number of computers. “Use” encompasses the saving of the software in a temporary storage medium (RAM) or on a permanent storage device (in particular on a hard drive, removable disk, USB stick or CD-ROM).

3.6   The customer may not lease or lend the licence. This restriction includes ceding the licence to a third party with whom he shares office space. If there is transfer to a third party the whole software contract must be transferred, not simply the licence. The third party must accept that the provisions of the contract still apply and the customer will then provide the new party with all copies and back-ups of the programme and the digital manual as a working copy together with any back-ups. In so doing, he forfeits his right to use the software and must de-install the software from his system.

3.7   The transfer of the contract to a third party is valid only if the software developer has been informed in advance and has consen­ted to the transfer in writing. Only in exceptional cases and with good reason will he withhold consent.

3.8   Pursuant to § 69 e UrhG the software supplied by the software developer may not be reconverted, decompiled or disassembled. Modifications to the software are only permissible if they help to correct defects in the software and if the software developer has not corrected said defects within a statutory period.

4. Support and maintenance

4.1   Support and maintenance for the software are provided on the basis of a maintenance contract.

4.2   Maintenance covers the services expressly listed in the confirmation of the order. The minimum level of maintenance involves a hotline service centre, the automated provision of large and medium-sized updates, remote diagnosis and maintenance and an online service for providing interim releases.

4.3   Maintenance services relate exclusively to software produced by the software developer. If the customer sells this software, the software developer is no longer obliged to provide support and maintenance. The   developer will repay to the customer a portion of the fee representing the unused period up to the end of the contract, but only if he has been able to save costs or to make money by providing the services to another party.

4.4   Should the customer fall behind on payment the software developer is entitled to withhold support or maintenance until payments are up-to-date and to demand payment in advance.

5. Other services

5.1   The software developer provides other services to the customer. These will include installation of the software where this has been agreed in writing. Up-to-date information on fees for additional services is available from the software developer. The customer undertakes to bear any costs incurred by the software developer in the course of providing these services, where the costs have been discussed in advance.

6. Prices, conditions of payment, dispatch and delivery

6.1   Prices are as set out on the latest list compiled by the software developer and are exclusive of VAT, postage/packaging and insurance. All sums invoiced are payable immediately. Interest is payable on arrears and is set at 8% above the basic rate pursuant to § 247 BGB.

6.2   Set-off is only admissible in the case of claims that are uncontested, are contested but ready for decision or have been declared final and absolute. The customer has no rights of retention where they are unrelated to this contractual relationship. In exercising a right of retention, the customer may not retain a sum higher than that of his own claim.

6.3   In the case of an online purchase, and where the software developer receives the customer’s order direct, the software will be made available to the customer within three working days of receipt of the order. Where payment in advance is required, delivery will be made only after payment has been received in full by the software developer.

6.4   In all other cases (with offline orders or where a CD or other physical item has been ordered) delivery will be within three weeks unless otherwise specified in the confirmation of contract. The delivery period begins on the day of confirmation of contract. The software developer will enter the date on the confirmation.

6.5   Should the software developer be prevented by unforeseen and unavoidable circumstances from complying with his delivery obligations, the delivery period shall be extended commensurately. Where this is the case, the software developer will inform the customer without delay. The date for determining whether the delivery deadline has been met is the date of dispatch of goods.

6.6   Where the software developer is accountable for failing to honour a delivery deadline the customer may extend the deadline by an appropriate period. Only when this extension period has elapsed without delivery being made can he withdraw from the contract.

6.7   Responsibility for the software is transferred to the customer at the moment when the goods are entrusted by the software developer to the postal service, courier or haulier.

7. Reservation of title

7.1   The software developer retains ownership of all data storage media and other goods until payment has been received in full of all sums outstanding at the time of supply of goods relating to this contract between the customer and the software developer. It is the duty of the customer to diligently safeguard and adequately insure all products that remain the property of the software developer.

7.2   The software is supplied free of third-party property rights. Should a third party accuse the customer of infringing his industrial property rights in respect of the software supplied, the customer must notify the software developer immediately. The two contracting parties will then consult on how to respond.

8. Claims arising from defective goods

8.1   The customer undertakes to examine the software and the associated manual for defects within two weeks of receipt, and in particular to ensure that no components are missing, that the manual is complete and that all the key features of the programme function as they should. Before a third week has elapsed the customer should have notified the software developer, in writing, of any defects identified and any problems that can be identified in the course of a regular inspection. Notification should include a detailed description of all faults. Should the customer fail to examine the goods and report defects within the said period, the software is deemed to be faultless and the transaction to have been approved.

8.2   Should steps have to be taken by the software company to correct a defect, it is the responsibility of the customer to back up important files prior to repair works being carried out.

8.3   The customer is not entitled to claim compensation for defects arising from mistakes caused by damage, incorrect connections or incorrect operation. Neither is the software developer liable for damage resulting from modifications to the goods and services by the customer or third parties, unless the customer can demonstrate that said modifications do not seriously impede the software developer in his efforts to analyse and correct the problem and that the defect was already present when the customer took possession of the software.

8.4   Should the customer withdraw from the contract, he shall pay to the software developer an appropriate fee reflecting his usage of the software up to the date of withdrawal. This user fee is calculated on the basis of a three-year depreciation period.

8.5   Claims arising from defects are subject to a statute of limitations of one year, starting from delivery of goods.

8.6   The software developer is liable for defects in the software pursuant to the law governing the sale of goods:

9. Limitation of liability

9.1   The software developer is fully liable for loss of life, bodily harm or compromised health resulting from negligence and breach of obligations on his part or from deliberate or negligent breach of obligations by one of his agents or assistants.

9.2   In the case of other liability claims the software developer shall be fully liable only where the software is found not to possess the advertised features and functions or where it can be demonstrated that the software developer or his agents or key employees are guilty of premeditation or gross negligence. Where the fault can be attributed to other assistants or lower-echelon employees the software developer shall be liable only in respect of ordinary negligence as set out in Point 6.4.

9.3   In respect of ordinary negligence the software developer is liable only where he is in breach of an obligation whose observance is of special importance for the fulfilment of the purpose of the contract (cardinal obligation).

9.4   Barring invocation of Point 9.1, liability for loss of data is limited to the standard cost of recovery that would have been incurred in the course of regular backing up of data commensurate with the risk of loss. Liability as set out in the Product Liability Act (Produkthaftungs­gesetz) remains unaffected.

9.5   The above provisions also apply in favour of the colleagues and assistants of the software developer.

10. Final provisions

10.1   Contracts between the software developer and the customer are interpreted exclusively in accordance with the law of the Federal Republic of Germany.

10.2   Place of fulfilment for both parties is the office of the software developer in Berlin. Berlin is also the legal venue.

10.3   In a case where one or more provisions agreed on by the contracting parties become, or are found to be, invalid, this shall not affect the validity of the remaining provisions. An invalid provision shall be replaced by one that most nearly reflects the purpose of the original provision as intended by the contracting parties. If the provisions of this contract are found not to cover all eventualities, the lacuna is to be filled with a provision or provisions that the parties would have agreed on if full account had been taken of the legal position, the matter at hand and the legitimate interests of each party.


Version: 1.3
Berlin, December 1, 2021

Additional Sales Terms

Additional Sales Terms

  • Prices do not include VAT. Depending on the origin of the customer and the type of product, VAT might be charged in addition to the net price.

  • Valid prices at any time are the ones listed in this document. Other, possibly older printouts, prices cached in search engines, outdated proposals etc. are not applicable.

  • All prices are subject to change without prior notice.

  • At any time, the price provided in Euro (€) is valid. Prices provided in other currencies are approximate and provided for rough orientation only.

  • In principle, only one discount can be applied to any purchase.

  • If authorities in the land of the customer's origin or the customer himself demand original documents in paper form, the customer accepts additional courier costs of 60 EUR within the EU or of 120 EUR per shipment outside of the EU. These costs need to be paid by the customer prior to shipment and will be noted as a separate line item on the final invoice. If the customer decides to employ his own forwarder, only the costs for the original document (30 EUR) apply.

  • If you purchase an upgrade or module for only a subset of User Keys, we will split your license. Your existing license will remain with a reduced number of User Keys. You will receive an additional new license with the new feature scope for the respective number of User Keys. Does not apply for EASE 5 (1 User per license).

  • Certain license-related services, updating of company data in licensed programs, transfer of licenses etc. may be possible at a service charge of 50 € net.

  • Delivery principally is by download from our website. After settlement of payment and credit entry, you will receive an email with your license information.

  • Manuals and/or tutorials are included in the online help and documentation of the programs.

  • All paid software licenses include 6 months of email and telephone support for installation, licensing, or technical software issues as part of the purchase. This service does not apply to trial or educational licenses. Project consulting services are not part of the software purchase.

  • Most of our software, manuals and tutorials are provided in english language only.

  • Installation CDs/DVDs and manuals/tutorials can be ordered separately and at extra cost if desired. Delivery may be by an external service partner of AFMG.

  • Educational institutions such as schools or universities can apply for special educational or research license offers.


AFMG EASERA – End User License Agreement

AFMG is a worldwide leader in the development of software for the pro-audio industry. AFMG has developed, amongst other programs, and is the sole owner of the Software AFMG EASERA (hereinafter the “Software”). The software allows performing acoustic and electronic measurements and provides numerous analysis functions. Acquired impulse response and frequency response data can be viewed and evaluated with respect to a range of acoustic quantities such as level, arrival time, clarity or reverberation time. AFMG EASERA is intended for use by acoustic consultants, loudspeaker engineers, system technicians as well as other professionals in the field of analyzing room acoustic characteristics, commissioning sound systems, designing loudspeakers, or documenting acoustic environments. Results can be stored in various data formats as well as in text and picture files for use in reports and documentation. The Software is provided by AFMG or authorized distribution partners (AFMG’s “Partners”).

EASE and AFMG are registered trademarks of AFMG Technologies GmbH. Their use is governed by AFMG’s official trademark guidelines and all applicable trademark laws.

This end user license agreement (“Agreement”) governs the legal relationship between AFMG Technologies GmbH, Borkumstr. 2, 13189 Berlin, Germany (“AFMG”), and the commercial end user of the Software (“User”). As AFMG does not sell the Software to private end users, this Agreement does not apply to those. By downloading the Software from AFMG’s or its authorized Partners’ websites, the User unconditionally accepts the terms and conditions of this Agreement.

1.    Subject of the Agreement
1.1.    AFMG provides the Software for download from its web portal available at http://downloads.afmg.eu. AFMG provides the User with the number of user keys purchased by the User. Each user key purchased by the User (“User Key”) allows for the User to use the Software on one (1) computer at a time while the installation on several computers is allowed.
1.2.    The establishment and maintenance of a functional hardware and software environment is the sole responsibility of the User. The minimum system requirement for the installation of the Software is Windows 10.
1.3.    AFMG does not provide and has no obligation to provide the User with the source code of the Software.
1.4.    The User shall observe all instructions provided by AFMG for the installation and operation of the Software.

2.    Granting of Rights
2.1.    AFMG grants the User a perpetual, non-exclusive, non-sublicensable and non-transferable right for the term of this Agreement to use the Software on a number of computers only. This number corresponds to the number of User Keys purchased from AFMG or AFMG’s Partners.
2.2.    Reproduction of the Software is only permitted insofar as it is necessary for use of the Software in compliance with this Agreement. The User may produce backup copies of the Software as is necessary and in keeping with good practice. Backup copies on removable data storage media must be labeled as such and must bear all copyright and proprietary notices. 
2.3.    The User is not authorized to change, adapt, arrange or otherwise modify the Software unless expressly allowed under the applicable copyright law or upon prior written consent by AFMG.
2.4.    The User must not transfer or sublicense the Software to third parties without prior written consent by AFMG.
2.5.    AFMG remains the sole owner of all rights in and to the Software and reserves all rights not granted to the User under this Agreement.

3.    Technical Support and Maintenance Updates
3.1.    AFMG shall provide the following technical support services (“Technical Support”) to the User:

•    E-mail support within AFMG’s regular business hours;
•    Telephone support within AFMG’s regular business hours; 

Technical Support shall be provided for a period of six (6) months after the date of purchase of the Software. 

3.2.    Furthermore, AFMG shall provide the following maintenance support services (“Maintenance Updates”) to the User:

•    Bugfixes for the Software;
•    Adaptations of the Software in the event of changes to the current operating systems;

The scope and provision of Maintenance Updates lies in the sole discretion of AFMG. Maintenance Updates should be provided unless terminated by AFMG. AFMG will notify the User at least one (1) year prior to the termination of Maintenance Updates.

3.3.    Technical Support and Maintenance Updates shall be provided by AFMG free of charge.
3.4.    AFMG is entitled to terminate the provision of support services for good cause. In this event, AFMG shall notify the User about the termination. With the termination of the support services, all rights to use the Software and/or the Upgrade (see Section 4) shall immediately cease and the User is no longer entitled to use the Software and/or the Upgrade.

4.    Prices
4.1.    The fees to be paid by the User to AFMG and details regarding the available packages are specified in the price list in the version applicable at the date of the conclusion of this Agreement. The price list is available on AFMG’s website at https://www.afmg.eu/en/purchase#price.

4.2.    AFMG shall provide the Software after prepayment by the User. AFMG shall provide the respective download link by e-mail generally within two (2) business days.

5.    Limitations of Liability
5.1.    AFMG shall not be liable for any claims for damages or any claims for reimbursement of wasted expenses, regardless of the type of violation involved and regardless of the legal grounds, except:

a)    In cases of damage from injury to life, body or health due to negligent breach of duty by AFMG or intentional or negligent breach of duty by a legal representative or a person used to perform an obligation of AFMG; 
b)    In cases of other damage arising from a grossly negligent breach of duty by AFMG or from an intentional or grossly negligent breach of duty by a legal representative or a person used to perform an obligation of AFMG;
c)    In cases involving personal injuries or damages recoverable under the German Product Liability Act (Produkthaftungsgesetz), where liability shall be governed by applicable law, regardless of default.

5.2.    Except as provided in Section 5.1. above, AFMG shall not be liable for any damages, including, without limitation, financial losses of any kind.

6.    Indemnification
6.1.    The User shall fully indemnify AFMG from all third-party claims, which arise from any illegal, culpable use of the Software by the User. This includes in particular patent claims, copyright claims or other commercial intellectual property right claims as well as claims arising from a violation of personal rights or from the unauthorized collection, storage and application of personal data. The User will indemnify and hold harmless AFMG from all legal fees reasonably incurred by AFMG that are attributable to any such claim.
6.2.    In the event the User learns or must learn that the infringement of such right is imminent, the User shall immediately inform AFMG.

7.    Trademarks
Unless otherwise agreed between the parties in writing, the User shall only use AFMG’s trademarks in accordance with AFMG’s Trademark Guidelines which can be accessed on AFMG’s website at https://www.afmg.eu/en/trademarks.

8.    Jurisdiction, Governing Law, Final Provisions
8.1.    Any disputes arising from or in connection with this Agreement shall be determined by a court of competent jurisdiction in Berlin, Germany.
8.2.    This Agreement shall be governed by and construed in accordance with the laws of Germany. For the avoidance of doubt, the United Nations Convention on Contracts for the International Sale of Goods (CISG) does not apply.
8.3.    This Agreement reflects the entire agreement between the parties. The parties have entered into no oral or written collateral agreements with respect to the subject matter hereof. Any terms and conditions of the User do not apply. For the avoidance of doubt, it is expressly agreed between the parties that this Agreement shall prevail over any terms and conditions used or referred to by the User.
8.4.    If any provision of this Agreement shall be held invalid, the validity of the remaining provisions shall remain unaffected thereby. Any invalid provision shall, to the extent permitted by law, be replaced by such valid provision as most closely reflects the commercial intent and purpose of the original provision. The forgoing shall apply respectively if any provision shall have been inadvertently omitted from this Agreement.

Version: 1.1
Berlin, May 24, 2024