EASERA Features

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Measurement Module

Measurement Signals

  • Sweeps (white, pink/log, weighted)
  • MLS - Maximal Length Sequence (white, pink, weighted)
  • Random noise (white, pink, weighted)
  • Sinusoidal signal, impulse and step
  • Custom signals, based on WAV file format
  • User-defined signals, created with signal generator
  • TDS Sweeps (with TDS module)


Supported Hardware 

  • Supports most modern PC audio interfaces
  • Time synchronized input and output clocks are recommended for delay measurements
  • Sampling Rates from 8kHz to 192kHz
  • 32 Bit resolution, hardware-dependent
  • Supports MS Windows Direct Sound, Wave and ASIO drivers (preferred) 
  • Large variety of hardware selection and calibration possibilities 

Types of Measurement

  • Single channel measurement
  • Dual channel FFT
  • Refernce measurements
  • Record mode for use of external sound sources 
  • Playback mode
  • Measurements with up to 32 input channels
  • Unlimited number of repetitions and averages
  • Support of "Presend"-functionality
  • Real time signal supply to EASERA allows for so-called-source-independent measurements
  • Polars and automated measurements

Measurement Wizard

  • Choice of type of measurement
  • Selection of measuring conditions
  • Proposal for appropriate stimulus signal


  • Calibration for microphone input, electronic input and volume controls
  • Automated input volume control for maximum S/N
  • Compensation for hardware frequency response by means of reference measurements, either using the second channel or by measuring in advance

Signal Generator

Supported Functions:

  • Sweep generation for different parameters, such as start and stop frequency and weighting
  • MLS generation, for all orders and with user-defined pre-emphasis
  • Random noise, with different weightings
  • Sinusoidal signal, impulse and step function creation
  • Created files can be saved in a WAV format for measurements or playback

Real Time Analyzer

Supported Functions

  • Custom FFT windows and resolution
  • Loading and saving of memories
  • Event detection and logging
  • Different dB-weightings, such as A-weighting etc.
  • Various display resolutions, logarithmic or linear
  • Tolerance mode


  • Real time level chart
  • Transfer function
  • Monitoring of up to 32 input channels
  • Level meters
  • Spectogram

Post Processing

Supported Parameters

  • Room acoustic parameters conform to ISO 3382, for example:
    EDT, T10, T20, T30, D50, C80, Center Time, MTF calculation and STI
  • Electro acoustic parameters, for example:
    Direct SPL, Total SPL, L50, Arrival Time, AlCons
  • Additional Parameters, such as:
    RMS, Noise Level, Crest Factor


  • Time Domain views:
    Impulse Response, Energy Time Curve (ETC), Schroeder Integral, Echo criteria
  • Frequency Domain views: 
    Magnitude, Phase, Group Delay, Real Part, Imaginary Part, Smoothings and Averages, Integrals
  • Tabular view
  • Statistics for result data tables, such as average and standard deviation
  • Original measurement data for inspection
  • Overlay display to view and manipulate multiple data sets simultaneously 


  • Interactive cursors to view and compare curves at points of time of frequency
  • Number of data sets to be loaded and viewed only limited by PC memory
  • FFT block size only limited by PC processing capabilities
  • Automated transforms, target-oriented rather than function-oriented user interface
  • Octave and Third Octave filters as in IEC 61260
  • Noise level calculation and subtraction
  • Import and export of data in all common formats, for example WAV, MLSSA, TEF, EASE
  • Support of all common electronic
    and acoustic units for display
  • Increased noise immunity resulting from software
    based TDS tracking filter (with TDS module)
  • Real-time wave front measurement

Editing Methods

Supported Functions

  • User-defined Filters
  • User-defined windows
  • Editing of data sets, such as addition or division
  • Merging and cutting of files
  • Smoothing, averaging
  • All editing steps are stored in editing sequences and can be loaded, saved and reapplied
  • Full undo/redo support
  • Editing sequences for automated processing
  • In-situ absorption measurement processing

Distortion Analysis

Types of Measurements:

  • Continuous log sweep
  • Logarithmic or linear resolution
  • Custom smoothing and calculation parameters


  • THD, THD+N
  • THD spectrum
  • Harmonic spectra
  • Relative spectra

Licensing System

With all our software we offer a very flexible and generous licensing system.
All AFMG software comes with an international licensing server which provides many additional benefits to both single users as well as larger offices. The little trick which makes AFMG licenses so flexible is the so-called “User Key”, a little piece of data which is used to unlock the software you have installed on your PC.

  • Use the software alternatingly on many PCs.
  • Up- and download a User Key easily
    to activate different PCs.
  • Add additional User Keys to your license at any time.