Open-source alternatives to EarTrumpet

Deej is a hardware-to-software bridge and system audio manager written in Go that maps physical Arduino sliders to volume levels on Windows and Linux. It functions as a cross-platform audio mixer that allows for the control of master volume, microphone levels, and individual application audio through an external hardware interface. The project distinguishes itself by providing a configuration-driven mapping system that binds software processes and hardware audio devices to specific physical sliders. It includes logic for slider direction inversion to correct for reversed hardware wiring and s

FineTune is a macOS audio management tool designed for directing application audio streams to specific output devices and controlling per-app volume levels. It functions as an audio routing manager and a system utility for device management. The project features a multi-band audio equalizer with headphone response correction and a hardware interface for adjusting external monitor volume levels via the display data channel. It also includes a control interface that allows volume and routing changes to be triggered by external scripts using custom URL schemes. The software covers broader capab

win-capture-audio is an OBS Studio plugin and extension for Windows that captures independent application audio streams. It functions as a Windows application audio router to isolate specific sound sources for recording or streaming. The project focuses on application audio isolation, allowing users to route audio from a single running program while ignoring other background sounds, notifications, or system audio. This enables the management of game stream audio by separating game sound from voice chat or music.

MonitorControl is a macOS display control utility and external monitor manager. It functions as a DDC/CI display controller that allows users to adjust the brightness and volume of third-party monitors using native Apple keyboard keys. The software mimics native macOS hardware feedback by implementing a system overlay tool that renders on-screen display indicators during adjustments. It further provides the ability to synchronize brightness levels across multiple screens or replicate ambient light sensor changes to external displays. The utility includes capabilities for mapping custom keybo

Audio Router is a virtual audio routing tool used to redirect audio streams from specific software applications to chosen playback devices and hardware outputs. It functions as an application audio manager that allows for the assignment and saving of audio device preferences for individual running processes. The software includes capabilities for duplicating audio streams, enabling a single audio signal to be sent to multiple output devices simultaneously for synchronized playback. It also provides real-time audio monitoring through peak meters to visualize signal strength and audio levels ac

wavesurfer.js is a WebAudio playback library and interactive waveform visualizer that renders audio data onto an HTML5 canvas. It enables users to see and navigate sound files through a visual representation of audio peaks, allowing for direct seeking and playback control within a web browser. The project is distinguished by its flexible rendering model, which can use precomputed peak data to display waveforms without downloading or decoding the full audio file. It utilizes a plugin-based extension model to integrate advanced tools such as spectrograms, interactive audio timelines, and real-t

VDO.Ninja is a low-latency peer-to-peer media routing service and video streaming platform designed to integrate remote audio and video feeds into professional production workflows. It functions as a WebRTC broadcast integration tool and studio controller, allowing for the direct transmission of high-definition media between publishers and viewers with minimal delay. The platform distinguishes itself through extensive protocol bridging, converting between WebRTC, WHIP, WHEP, SRT, and RTMP to ensure compatibility across diverse network environments and professional studio software. It includes

AndroidUtilCode is an Android utility library and system API wrapper designed to reduce development boilerplate. It provides a collection of helper classes for common tasks including system settings management, file I/O, and hardware access. The project distinguishes itself through a comprehensive toolset for device management and UI assistance. It includes specialized capabilities for monitoring battery status, managing system volume and brightness, and implementing UI helpers to prevent duplicate click events. It also provides a dedicated system for coordinate conversion between different m

eqMac is a system-wide audio equalizer and volume mixer for macOS. It utilizes a virtual audio driver to intercept system output, allowing users to adjust frequency response, boost system volume, and control independent volume levels for different running software applications. The project functions as an audio unit plugin host, integrating third-party plugins into the system audio stream for professional effects. It also includes a local web server that enables remote audio control via HTTP, allowing users to modify audio parameters from a mobile device or other external hardware on the same

Hammerspoon is a programmable automation engine for macOS that enables deep system-level control through a Lua scripting environment. By bridging high-level scripts with native Objective-C APIs, it allows users to interact with the operating system's accessibility tree, intercept hardware input streams, and manage the lifecycle of running applications. The project distinguishes itself through an event-driven architecture that registers asynchronous hooks for system notifications and hardware events. This allows for real-time automation, such as remapping keyboard and mouse inputs, managing wi

FFmpeg is a cross-platform multimedia framework designed for the recording, conversion, and streaming of audio and video content. It functions as a comprehensive toolkit that provides both a command-line utility for direct media manipulation and a collection of low-level libraries for integration into custom applications. At its core, the project utilizes a packet-based stream engine and a format-agnostic abstraction layer to handle diverse media standards, containers, and network protocols. The framework distinguishes itself through a modular, graph-based filter execution model that allows f

SFML is a cross-platform C++ multimedia library designed for building 2D games and interactive applications. It provides a unified interface for hardware-accelerated graphics, audio playback, and window management, allowing developers to create visual software that functions consistently across different operating systems. The library abstracts native windowing and graphics APIs, enabling the use of object-oriented primitives to render shapes, sprites, and text. It includes a dedicated audio engine that supports sound effects and music with controls for volume, pitch, and spatial positioning,

Bashtop is a terminal-based system monitor and resource dashboard for Unix systems, including Linux, macOS, and FreeBSD. It provides a text-user interface for tracking real-time hardware performance and managing system processes. The tool functions as a hardware dashboard that visualizes processor, memory, disk, and network usage. It includes process management capabilities that allow users to filter, sort, and terminate active system tasks directly from the command line. Users can customize the visual appearance and behavior of the monitor through integrated menus or local configuration fil

LibreHardwareMonitor is a .NET library and system health monitoring tool for Windows. It provides a programmatic hardware sensor API and a low-level interface to access real-time temperature, voltage, and fan speed data from computer hardware components. The project serves as a bridge between Windows operating system calls and physical sensors, allowing for the monitoring of processors, graphics cards, motherboards, storage devices, and network adapters. This enables the tracking of system stability and the collection of environmental changes across various hardware components. The software

htop is a terminal-based system resource monitor and interactive process viewer. It functions as a text-user interface dashboard for overseeing hardware temperatures, load averages, and battery status while providing a comprehensive tool for monitoring and managing system processes. The application distinguishes itself through detailed process lifecycle management, allowing users to kill processes, adjust priorities via renicing, and assign CPU affinity to specific cores. It provides high-level visibility into system behavior through process hierarchy visualization and the ability to inspect

Gotop is a terminal-based system monitor and resource dashboard built with the Go programming language. It serves as a text-based user interface for real-time tracking of hardware resources, network activity, and running processes. The application provides a performance dashboard featuring graphical widgets for CPU and memory metrics. It includes a process manager that allows users to list, sort, and terminate active system processes based on their resource consumption. The interface supports customization through theme styling and layout configurations, enabling users to adjust color scheme

This project is a system audio processor and digital signal processing engine designed to enhance system-wide sound volume and clarity. It functions as a high-fidelity sound enhancer and parametric audio equalizer that shapes the sonic profile and timbre of audio across all output devices. The software utilizes a virtual audio device driver to intercept system audio streams at the kernel level, redirecting them through a processing pipeline. This allows for real-time sound processing and low-latency audio filtration to minimize the delay between sound generation and output. The system covers

Lyrebird is a real-time audio processing application designed for Linux systems that modifies microphone input. It functions by capturing and routing system audio streams through virtual devices, allowing users to apply frequency adjustments and voice effects before the signal is passed to other desktop applications. The application provides a graphical interface built with a declarative toolkit, enabling users to manage and toggle between custom voice presets. These configurations are stored locally, ensuring that specific pitch settings and audio profiles remain consistent across different

Dashy is a configuration-driven dashboard designed for personal infrastructure management and self-hosted service monitoring. It functions as a centralized portal that aggregates web links, live infrastructure metrics, and application health status into a unified, searchable interface. By utilizing a structured schema, the platform allows users to define their entire layout, navigation, and widget configuration through version-controlled files, ensuring a portable and reproducible setup across different environments. The project distinguishes itself through a highly modular architecture that

Ruffle is an Adobe Flash Player emulator built to execute legacy animation and interactive content within modern web browsers and desktop environments. By utilizing a high-performance WebAssembly engine, it interprets legacy bytecode and scripting languages to render content without requiring original plugins or outdated software. The project functions as a cross-platform media player that preserves access to archived digital assets by simulating the original runtime environment. The emulator distinguishes itself through its ability to automatically detect and replace obsolete media objects o

Locust is a distributed performance testing framework that allows users to define complex system stress scenarios using standard Python code. By modeling concurrent users as classes with weighted tasks and lifecycle hooks, it enables the simulation of realistic user behavior across large-scale environments. The tool functions as a scalable load generator capable of orchestrating traffic across multiple worker nodes to measure system stability and responsiveness under heavy, real-world conditions. The framework is distinguished by its protocol-agnostic architecture, which supports diverse comm

gtop is a terminal system monitor and process resource manager that provides a text-based user interface for tracking operating system performance. It functions as a real-time dashboard for monitoring CPU, memory, and network resource usage directly within the command line. The tool enables terminal-based process management by allowing users to identify and analyze resource-heavy tasks. It specifically supports sorting active system processes by their CPU and memory consumption to assist with server resource analysis and performance troubleshooting.

ServerStatus is an infrastructure observability platform and multi-server monitoring dashboard. It utilizes a system of remote agent-based metrics collectors to gather server telemetry and push that data to a central server via HTTP. The platform provides a centralized web interface for tracking the real-time health, resource usage, and availability of multiple remote servers. It includes a threshold-based alerting system that triggers notifications when server resource metrics exceed predefined limits or watchdogs. The system covers cloud infrastructure observability through remote resource

Homarr is a self-hosted service dashboard and home lab management portal. It provides a centralized web interface for organizing and accessing local network services and third-party applications through customizable boards and widgets. The project distinguishes itself as a Docker container manager and network service proxy. It enables the monitoring of resource usage and administrative control of containerized environments, while routing HTTP and WebSocket traffic to internal services. It also functions as a hub for tracking software releases and monitoring real-time system resources such as

Apache NiFi is a flow-based programming platform that enables the visual design, monitoring, and management of data pipelines. At its core, it provides a web-based visual dataflow designer where users build directed graphs of processors to route, transform, and mediate data movement between any source and destination without writing custom code. The system records fine-grained data provenance for every data item from ingestion to delivery, supporting audit, debugging, and replay of data lineage. The platform distinguishes itself through a zero-master cluster architecture that distributes proc

Sun-panel is a customizable web portal and self-hosted homepage dashboard used to organize web links and monitor server status through a visual interface. It functions as a centralized browser start page for managing access to self-hosted services, network applications, and navigation shortcuts. The platform supports multi-user access with isolated configurations and independent accounts, allowing different users to maintain their own navigation hubs. It also includes a system monitoring dashboard for tracking the real-time health and performance metrics of servers and network-attached storag

Cronicle is a distributed job scheduler that replaces traditional cron with a browser-based management interface. It runs scheduled tasks across a cluster of servers with automatic failover, using a custom cron parser that intersects day-of-month and day-of-week constraints when both are specified. The system executes jobs through a plugin framework that runs command-line scripts in any language, communicating via JSON over standard input and output. The scheduler provides a web-based real-time dashboard for monitoring running jobs with live logs, resource usage charts, and progress updates.