System Software


Faster, Easier, and More Powerful Than Ever Before

MAESTRO 9.0 is our latest fitting software for MED-EL cochlear implants. MAESTRO 9.0 builds on the guided workflow and easy handling of MAESTRO 8.0 and introduces powerful new fitting options and helpful tools. We integrated extensive feedback from audiologists and clinicians in the field to make MAESTRO 9.0 our most powerful and intuitive software ever.

  • Guided Workflow
  • Bimodal Synchronization
  • Anatomy-Based Fitting

Intuitive Handling

MAESTRO 9.0 is designed to be as accessible and intuitive as possible for both new and experienced clinicians. With a guided workflow, you can easily see recommended tasks. The new session view provides a comprehensive overview of your current fitting session.

Guided Workflow
Suggested tasks are highlighted to help you quickly and easily perform recommended tasks for both intra-operative measures and fitting sessions.

Improved Usability
Enhanced user interface makes it faster and easier to change front-end settings for each map, create progressive maps, adjust basic parameters, or perform loudness balancing.

Map-Specific Settings
Set map-specific front-end processing levels, like Strong Wind Noise Reduction for one map and Mild for another.

Easily check how the microphones of RONDO 3 and SONNET 2 respond to sound to confirm that the processor is correctly receiving input.*

Advanced Program Options
Telecoil booster and adjustable microphone gain for direct-audio input lets you fine-tune how processor handles audio levels when using external audio sources.*

Firmware Upgrades
On-site firmware upgrades for RONDO 3, SONNET 2, and DL-Coil let you quickly update the processor without needing to send the device in for service.*

Session View

Our new session view is a complete dashboard of everything you want to know about a patient’s processors during a fitting session. You can see telemetry for each electrode. It has full bilateral support, and you can add a processor with one click. You can go live with one side or with bilateral and quickly adjust charge levels right in the session view for loudness balancing without opening a map. 

MAESTRO 9 - Session View


AutoART is the fastest automatic ECAP measuring tool available. With one click, you can perform intra-op ECAP across all 12 electrodes in 90 seconds. During fitting sessions, you can perform a detailed automatic ECAP analysis in just a few minutes. And with the ARTFit algorithm, you can instantly create a profile map based on these FineGrain ECAP objective measures.[ft][ft][ft][ft][ft][ft]

MAESTRO 9 - Made for Bimodal

Made for Bimodal

MED-EL cochlear implants are designed to provide a closer to natural match with any hearing aid. There are three main components that should match between the CI system and the hearing aid: pitch perception, loudness growth, and timing of a sound.

By combining these three elements, MED-EL offers the best solution for bimodal listening with practically any hearing aid. And with MAESTRO 9.0, you can easily optimize settings in the bimodal session view.

Hearing Aid  & SONNET 2

Pitch Matching

Our long arrays and unique FineHearing technology provide the closest to natural pitch match of any CI, so we can provide a much closer match to the acoustic frequencies of the hearing aid. Other companies may use a bimodal fitting formula with partial integration, which can compromise the performance of the hearing aid ear.[ft][ft][ft][ft][ft][ft][ft]

Our complete integration approach can offer a more natural frequency range and sound perception to both ears. This also lets you independently fit the hearing aid to best benefit, rather than using a bimodal fitting formula to correct for the CI.

Partial Integration


Cochlear Implant

Partial Integration

Hearing Aid


Complete Integration


Cochlear Implant

Complete Integration

Hearing Aid


Matched Loudness Growth

The natural loudness growth and 3:1 compression ratio of our proven dual-loop Automatic Gain Control makes it easy to balance with nearly any hearing aid—without having to drastically refit the hearing aid compression ratio.[ft]

This balanced front-end processing also means both the hearing aid and the audio processor can use any microphone directionality or beamformer settings without needing a wireless sync between devices. You can simply independently fit each device to best benefit. And with MAETRO 9.0, you can easily perform a bimodal loudness balancing in our bimodal session view. 

Synchronized Timing

Our FineHearing technology helps preserve natural timing information by mimicking natural rate coding. And now with MAESTRO 9.0, we introduce a powerful new feature: Bimodal Synchronization. Every hearing aid has an inherent processing delay, which is longer than the processing time of the CI audio processor. This can cause a mismatch between the CI audio processing and the acoustic hearing aid. In turn, this timing mismatch would affect accuracy of inter-aural timing differences (ITDs).

With Bimodal Synchronization, you can easily match the processing delay timing between RONDO 3 or SONNET 2 and nearly any hearing aid, without needing to refit the hearing aid. This more natural timing perception can support better sound localization.*[ft][ft]

Better Sound Localization
Zirn et al. 2019

Find timing settings for hearing aids

You can use the "Bimodal Synchronization" feature in MAESTRO 9.0 or later to synchronize processing timing with another hearing device.

More on Bimodal Synchronization

MAESTRO 8.0 - Powerful Tools

Powerful Tools

With MAESTRO 9.0, you have an intuitive workflow for everyday fitting, but we also have advanced fitting tools to give you more control and insight. MAESTRO 9.0 is packed with powerful tools for clinicians, including Triphasic pulses, integrated eSRT and eABR tasks, and late-latency cortical objective measures.

MAESTRO 9 - Powerful Tools

Triphasic Pulses
This unique pulse shape helps control current spread, which can be especially useful for patients with non-auditory stimulation.

ART Advanced Set Up
Measure the cochlear microphonics (CM) as a response to acoustic stimulation in patients with residual hearing.[ft][ft]

eSRT & eABR Measures
Integrated eSRT and eABR tasks allow you to utilize detailed objective measures within the MAESTRO 9.0 interface.

Cortical Responses
Measure late latency response to help confirm if stimulation is generating a response in the auditory center of the brain.

MAESTRO 9 - Anatomy Based Fitting

Anatomy-Based Fitting

Our philosophy has always been to provide a closer match to natural hearing. Our unique long electrode arrays enable more accurate pitch-place stimulation of the natural tonotopic map of the cochlea. Our unique FineHearing sound coding is designed to mimic natural rate coding in the second turn of the cochlea.

With MAESTRO 9.0, we are excited to be reaching closer to natural hearing than ever before with cochlear implants. Our default FineHearing frequency allocation is designed to follow the natural tonotopic map of the cochlea. However, we know that one size does not fit all. This is why we are always striving to provide a closer match for each individual patient.

With our new anatomy-based fitting tools, you can easily fine-tune the frequency map to be closer to the natural map for each individual cochlea. By combining detailed imaging data from OTOPLAN with MAESTRO 9.0, you can now quickly assign center frequencies based on the actual anatomical location of each electrode contact.*


Identify electrode contact location with OTOPLAN

OTOPLAN is a powerful and intuitive surgical planning software that lets you visualize detailed 3D anatomy from standard imaging. In the latest version of OTOPLAN, you can automatically identify contact location using post-op imaging. OTOPLAN instantly calculates the natural tonotopic frequency for each electrode contact.**


Apply Anatomy-Based Fitting

With just a few clicks, you can import this detailed electrode location data into MAESTRO 9.0 from OTOPLAN. MAESTRO 9.0 automatically calculates an optimal distribution of electrode center frequencies to cover the full input frequency range (70Hz–8,500 Hz) while aligning to the natural tonotopic map as closely as possible based on where each contact is positioned in that cochlea. You can optionally fine-tune the frequency range of each electrode contact using simple manual controls.


Complete Fitting

Anatomy-based fitting helps you to assign more natural frequency distributions on an individual electrode array. After finishing these simple steps for ABF, you can carry on with your normal fitting process. Anatomy-based fitting in designed to work together with subjective patient feedback and objective measures.

MED-EL Academy: Anatomy-Based Fitting

Ready to learn more about starting with Anatomy-Based Fitting for your clinic? Check out our in-depth online series on the fundamentals of Anatomy-Based Fitting, plus detailed guides to OTOPLAN and MAESTRO 9.0—find everything you’re looking for over on the MED-EL Academy!

Discover More

MAESTRO 9 - MED-EL Academy: Anatomy Based Fitting

Why MED-EL: 
A Trusted Partner

For more than 30 years, MED-EL has been a trusted partner and innovation leader in hearing implants. We’re here to work together with you, and we’re committed to providing outstanding service and support for our professional partners. 

With the most advanced cochlear implant systems, we offer the best hearing experience for your patients and the best clinical experience for you. 

Contact Us

Have a question about the benefits of MAESTRO software? Want to know how to download the latest version for your clinic?
Let us know how we can help with our simple contact form.

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Technical Data


MAESTRO 9.0 System Software

MAESTRO 9.0 Features

  • Coding strategies: FS4, FS4-p, FSP, HD-CIS. The Fine Structure Processing strategies (FS4, FS4-p, FSP) deliver both tonotopic and temporal information, reflecting natural hearing.
  • Pulse shape options: Biphasic and Triphasic Pulses, Interphase Gaps (IPG)
  • Four program positions
  • Progressive maps: Automatic generation of maps with an increase in loudness
  • Integrated EAS acoustic fitting (6-channel EAS acoustic fitting)
  • Longitudinal patient record: The patient history gives a quick overview over previous measurements and mappings
  • Data import and export with integrated option to anonymize patient data
  • Visual reinforcement tool (VRT): Integrated media player to support fitting with visual rewards
  • Compatible with all current multi-channel MED-EL cochlear implants
  • Compatible with all currently available MED-EL audio processors

MAESTRO 9.0 New Features

  • New bimodal view in postoperative sessions that allows bimodal synchronization for patients with a hearing aid*
  • Support for importing OTOPLAN data and compute a frequency band distribution based on OTOPLAN data*
  • New System check dialog that can help perform a functional check of certain hardware components of an audio processor*
  • Support of processor software updates for certain audio processor types*
  • Telecoil booster and direct audio input booster*

Professional online portal***

  • Integrated link to myMED-EL, an online platform for professionals


The following measurements are available intraoperatively and postoperatively:

  • Impedance and Field Telemetry (IFT): Easy and fast implant integrity check
  • Electrically Evoked Compound Action Potential (ECAP) measurements: AutoART is the fastest automatic ECAP measuring tool (intraoperative: 90 seconds for all 12 channels, postoperative: 3-4 minutes for all 12 channels), ART provides extended configuration options and additional measurement types
  • Electrically Evoked Stapedius Reflex Threshold (ESRT): Check implant function intraoperatively or find an objective baseline for fitting postoperatively
  • Electrically Evoked Auditory Brainstem Response (EABR): Confirm if stimulation is generating a response in the auditory center of the brain
  • Electric Acoustic Evoked Potential (EAEP) Tool (Advanced ART Setup): Record coordinated electrically and acoustically evoked intracochlear potentials with the first clinically available cochlear microphonics (ECoG) tool


  • Automatic ECAP based maps: ARTFit automatically generates a fitting map based on an ECAP measurement
  • Strategy independent energy consumption: The energy consumption of the processor is independent of the selected coding strategy
  • Loudness balancing: Easy simultaneous balancing of bilateral CIs, SSD cases or CI to hearing aids
  • Remote fitting capability

System requirements

Hardware requirements

  • PC or Laptop/Notebook in connection with one of the supported Microsoft® Windows® operating systems
  • Dual-core processor with a clock speed of 1.6 GHz or higher
  • 2 GB RAM or more
  • 2 GB free disk space or more
  • Color display with a resolution of 1024 × 768 or higher
  • One free high-power USB 2.0 (or higher) compliant port
  • One free printer port or network connection to the printer

Software requirements

Microsoft Windows® 7, Service Pack 1 and later,
Microsoft Windows® 8.1, and later,
Microsoft Windows® 10 and later

Supported database formats

QLite, Microsoft SQL Server 2008, Microsoft SQL Server
2008 R2, Microsoft SQL Server 2012, Microsoft SQL Server
2014, Microsoft SQL Server 2016

MAX Programming Interface

The MAX programming interface is compatible with all current multi-channel implants and audio processors. It features two audio processor sockets, allowing simultaneous bilateral fittings.


Upgrading is quicker and easier than ever before, simply download the software. Alternatively, order a USB flash drive.

* Compatible with SONNET 2, SONNET 2 EAS, and RONDO 3 audio processors
** OTOPLAN software is a product of CAScination AG.
*** Not all services are available in all areas.

Not all features are available on all versions of SONNET 2/SONNET 2 EAS. You can check which SONNET 2/SONNET 2 EAS variant your patient has here. For full details on its features, please see the technical data.