The Client initially partnered with Developex as a growing startup. We provided full-cycle support, including firmware development, desktop software, UI/UX design, and process consulting.
After the Client became part of a major global semiconductor company, an Integrated Device Manufacturer (IDM), the collaboration expanded. As a trusted partner, we continued to enhance and scale the software and firmware to support a broader range of devices and advanced features.
Europe's largest semiconductor manufacturer
Audio&Video,
Electronics, Smart & IoT
Desktop Development,
Embedded Development,
Q&A, Design, Support
The Client, a leader in audio amplifier technology, needed a smart and flexible tool for audio engineers to fine-tune their advanced amplifiers. These devices featured:
Multi-level switching amplifier technology for ultra-high power efficiency across the full output range
An integrated digital audio processor
Configurable Power Mode Profiles (PMP) for performance tuning across different scenarios
A high-order feedback loop ensuring low distortion and high PSRR
Configurable Power Mode Profiles (PMP) for performance tuning across different scenarios
LC-free operation at full rated power
Embedded power management algorithms that dynamically adjust switching frequency and modulation to optimize power loss, EMI, and audio quality
Single-supply operation (PVDD) for simpler integration
These amplifiers are commonly used in battery-operated speakers, wireless and docking speakers, TVs, soundbars, and home theater systems.
To support this complex technology, Developex developed a complete Windows-based desktop software solution, enabling engineers to configure and fine-tune amplifier behavior across diverse use cases. Simultaneously, we built the embedded firmware that powers the amplifier’s intelligent features and ensures seamless integration with the control software.
The software allows simultaneous configuration and monitoring of up to four individual audio amplifiers from a single user interface.
Engineers can quickly and intuitively configure complex Digital Signal Processing (DSP) blocks and their parameters through a user-friendly visual interface.
The software calculates and displays the output sound curve (amplitude and phase) in real time, providing immediate visual feedback on the impact of configuration changes.
The application seamlessly operates with both physical audio amplifiers and virtual emulated devices, enabling remote support and configuration without the need for hands-on hardware.
For advanced users requiring deeper control, the software provides a visual interface that allows direct adjustment of amplifier registers, offering both basic and extended register maps for varying levels of technical access.
The main dashboard provides real-time status updates from connected amplifiers, including critical indicators like audio clips, errors, limiters, and channel modulation.
Users can instantly enable or disable key amplifier functions, such as DSP processing or Stand-By mode, directly from the software interface.
The firmware enables device configuration via both the I2C interface and dedicated control pins, ensuring versatile and reliable communication with the control software.
While the project was complex, Developex successfully addressed several key challenges:
Challenge:
Working with an international startup team required a deep understanding of their technical vision, product requirements, and development processes to ensure seamless integration and knowledge transfer.
Solution:
Developex initiated the partnership with on-site business trips, where our Project Manager and lead developer traveled to the Client’s location for hands-on collaboration. This approach enabled direct experience sharing, detailed product discussions, joint work sessions, and the establishment of optimized development processes. The face-to-face interaction was crucial for building trust and ensuring all parties were aligned on technical specifications and project goals.
Challenge:
Calculating and depicting the amplitude and phase of the output sound curve in real-time for multiple connected devices required highly optimized data processing and rendering.
Solution:
We leveraged the efficiency of Qt/QML for the UI and focused on optimized algorithms for signal processing within both the firmware and the desktop application, ensuring smooth and immediate visual feedback.
Challenge:
Translating intricate DSP block settings and raw amplifier registers into an intuitive and accessible visual user interface for audio engineers with varying levels of technical expertise.
Solution:
Through careful Qt/QML UI/UX design, we created visual representations of DSP blocks and implemented toggleable “basic” and “extended” register views, allowing engineers to choose their preferred level of control without overwhelming them.
Challenge:
Developing the software to accurately mimic the behavior of physical amplifier hardware for remote diagnostics and configuration when a real device was not available.
Solution:
We implemented a robust simulation layer within the desktop application that faithfully replicated the amplifier’s responses to commands and status reports, effectively creating a “virtual device” for engineers to work with. This was crucial for supporting global teams and minimizing travel.
Challenge:
As the software interacts directly with the amplifier’s configuration, ensuring the security and integrity of data transferred was paramount, especially given the use of libraries like OpenSSL.
Solution:
We implemented secure communication protocols for data exchange between the desktop application and the amplifier firmware, utilizing OpenSSL where appropriate to protect sensitive configuration parameters and prevent unauthorized access or tampering.
Qt/QML
Qt Installer Framework
libusb
Cmake (Arm-CortexM0)
LPC11U68
Embedded developer, Software developer, Project Manager, QA, UI/UX Designer
Agile Scrum
Our partnership with the Client resulted in the successful delivery of a powerful, flexible, and highly efficient solution that has significantly enhanced their audio engineering capabilities. The integrated desktop application and amplifier firmware have become an indispensable tool for fine-tuning, debugging, and optimizing their advanced audio products.
The remote support functionality, powered by virtual devices, has dramatically improved efficiency and client satisfaction for their distributed engineering teams. The scalable architecture and robust feature set position the Client to continue innovating at the forefront of the audio industry.
Enabled audio engineers to configure and fine-tune amplifiers with unprecedented speed and precision.
The virtual device capability allowed for efficient remote diagnostics and configuration, reducing travel time and costs.
The granular control and real-time feedback mechanisms empower engineers to optimize amplifier output for superior sound quality.
The developed software and firmware provide a flexible platform for supporting future amplifier models and advanced features.
Beyond technical expertise, our partnerships are built on a foundation of core values that ensure collaborative, innovative, and impactful project outcomes.
We serve as an extension of your team, offering proactive insights and guidance that extend beyond technical implementation.
We commit to delivering robust, high-quality, and optimized solutions that stand the test of time and evolving requirements.
We ensure open and clear communication at every stage, providing full visibility and fostering trust.
We embrace challenges, finding innovative and practical solutions to complex technical and logistical hurdles.
We design with tomorrow in mind, building scalable and adaptable systems that support your long-term product vision.
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Application delivers a powerful user experience, within a clean and intuitive graphic interface. Once connected, application automatically recognizes DSP and configure its interface
Developex developed a companion app for car mounts. Upon docking your phone, the mount automatically launches the app, giving you hands-free control to text,
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