MonsterMusic ~ Android Music Player


This is a local music player on the Android platform

[MonsterMusic] is open source, free. Enjoy all the features without any cost!

  • 🔊 Advanced Equalizer: Customize your sound experience with our built-in equalizer. Fine-tune the audio to match your preferences and immerse yourself in crystal-clear, high-quality sound.
  • 🌈 Multiple Themes: Personalize your music player with a variety of themes. Switch effortlessly between themes to match your mood or style. Your music, your way!
  • 📜 Lyrics Support: Dive deeper into the lyrics of your favorite songs. [MonsterMusic] supports lyrics display, you can import text or lyrics files. Click the lyrics word, you can find a feature.
  • 🔒 Privacy First: Rest easy knowing that your privacy is our top priority. No unnecessary permissions, just pure music enjoyment.

More features are waiting for your discovery.

github.com/ZTFtrue/MonsterMusic
sourceforge.net/projects/monstermusic.mirror

PORC ~ Python Open Room Correction


DSP Loudspeaker-Room correction filter wizard; transfer function modeling and equalization by fixed-pole parallel filters. Algorithm ported to Python by Mason A. Green, based on the work of Dr. Balazs Bank: home.mit.bme.hu/~bank/parfilt
PORC now includes mixed-phase compensation.

github.com/greenm01/porc

Cavern ~ Object-based Audio Engine & CODEC


Cavern is a fully adaptive object-based audio rendering engine and (up)mixer without limitations for home, cinema, and stage use. Audio transcoding and self-calibration libraries built on the Cavern engine are also available. This repository also features a Unity plugin and a standalone converter called Cavernize.

Cavern goes beyond fixed-channel audio systems by rendering any number of audio “objects” in three-dimensional space, tailored to the listener’s speaker arrangement or headphone output. It is also supported by a standalone conversion tool, Cavernize, which allows users to convert spatial mixes into conventional channel-based PCM formats while maintaining positional accuracy.

Key Features and Capabilities:

Object-Based Rendering
Cavern supports an unrestricted number of audio objects and output channels. This allows precise spatial placement and movement of sounds in 3D space, independent of specific channel layouts.

Codec and Container Support
The engine and its companion tools support a wide range of codecs and containers, including those commonly used for immersive audio delivery. Traditional formats such as WAV and common multimedia containers are also supported.

Calibration and Room Correction
Cavern includes tools for self-calibration and room equalization. These can flatten frequency response, compensate for acoustic irregularities, and help unify tonal characteristics across speakers.

Headphone Virtualization
Through HRTF-based processing, Cavern enables spatial rendering over stereo headphones. This simulates direction, distance, and spatial cues to reproduce the effect of multichannel speaker setups in a binaural listening environment.

Real-Time Up-Mixing
Legacy stereo or multichannel content can be up-mixed into fully rendered 3D scenes. This provides an immersive experience even when the source was not originally produced as object-based audio.

Integration with Game Engines
Cavern offers integration with Unity, enabling developers to incorporate real-time positional audio into games, simulations, and interactive media.


Use Cases

Home Cinema and Media Playback
Cavern can render object-based audio tracks for users who do not have commercial hardware processors. It allows accurate spatial playback through both speakers and headphones.

Headphone-Focused Listening
The binaural virtualization system benefits users who rely on headphones for movies, music, gaming, or general media consumption.

Game and VR Development
Developers can use Cavern inside Unity to produce dynamic, spatially accurate audio scenes in interactive applications.

Archiving and Conversion
Cavernize converts object-based audio into standard PCM or channel-based formats, preserving positional intent while enabling playback on conventional systems.

Speaker Optimization
Its calibration tools provide a software-based approach to room correction and multi-speaker alignment without requiring dedicated hardware processors.


Limitations and Considerations

  • Some supporting utilities are not fully open-source and may be distributed under separate licensing terms.
  • Spatial rendering benefits depend on input quality; poor-quality stereo sources will not yield true immersive results.
  • Speaker hardware, room acoustics, and HRTF compatibility affect the perceived accuracy of spatialization.
  • Integrating Cavern into custom software projects requires familiarity with its API and spatial-audio concepts.

Why Cavern Matters

Cavern stands out by making advanced spatial-audio technology accessible without requiring specialized hardware or proprietary processors. By combining open-source rendering, a flexible object-based architecture, codec support, calibration tools, and developer integration, it provides a versatile platform for enthusiasts, researchers, and media creators.

For users interested in experimenting with immersive audio workflows, whether for home cinema, headphone listening, archiving, or game development, Cavern offers a free, comprehensive and adaptable approach.


References:

  • VoidXH / Cavern – GitHub repository
  • Cavern documentation website
  • Cavern package listing on NuGet

cavern.sbence.hu/cavern
github.com/VoidXH/Cavern
github.com/VoidXH/HRTF
cavern.sbence.hu/cavern/doc
cavern.sbence.hu/cavern/downloads
www.nuget.org/packages/Cavern
en.wikipedia.org/wiki/Digital_room_correction#Cavern_QuickEQ

CamillaDSP ~ IIR & FIR Engine For Crossovers & Room Correction


A tool to create audio processing pipelines for applications such as active crossovers or room correction. It is written in Rust to benefit from the safety and elegant handling of threading that this language provides. Supported platforms: Linux, macOS, Windows.

Audio data is captured from a capture device and sent to a playback device. Alsa, PulseAudio, Jack, Wasapi and CoreAudio are currently supported for both capture and playback.

The processing pipeline consists of any number of filters and mixers. Mixers are used to route audio between channels and to change the number of channels in the stream. Filters can be both IIR and FIR. IIR filters are implemented as biquads, while FIR use convolution via FFT/IFFT. A filter can be applied to any number of channels. All processing is done in chunks of a fixed number of samples. A small number of samples gives a small in-out latency while a larger number is required for long FIR filters. The full configuration is given in a YAML file.

henquist.github.io
github.com/HEnquist/camilladsp

BaxterEQ ~ Mastering & Mix Buss Shelving EQ


BaxterEQ – transparent mastering and mix buss shelving EQ

Finest tonal sweetening and finishing which always stays true to the source:

  • natural and accurate bass response
  • authentic analog style HF curve rendering
  • smoothest shelving operation

Perfectly suited for the mastering chain:

  • stepped controls throughout for repeatability and matched channel operation
  • full dual channel layout
  • full mid-side encoding support
  • per channel level control for easy A/B match

Artifact free technical design:

  • low ripple and distortion filter implementations
  • 64bit floating point internal processing
  • oversampled for superior impulse response

Meticulously selected frequencies:

  • Baxandall shelving filters
  • LF @ 74, 84, 98, 116, 131, 166, 230 and 361 Hz
  • HF @ 1.6, 1.8, 2.1, 2.4, 3.4, 4.8, 7.1, 11 and 18 kHz
  • 2-pole Butterworth filters
  • LC @ 12, 18, 24, 30, 36, 43 and 54 Hz
  • HC @ 7.5, 9, 11.1, 12.6, 16, 21, 28 and 40 kHz

An additional analog signal path emulation provides some subtle but precious stereo imaging improvements.

varietyofsound.wordpress.com/downloads

MonoChannel ~ EQ & VU Meter Plugin


MonoChannel is a EQ and VU meter with basic console channel controls.

Insert MonoChannel on your audio tracks to monitor your audio signal and adjust its tonal balance. It is designed only to encourage the use of proper gain staging and audio balance workflows in digital audio. MonoChannel is NOT a distortion/saturation/console emulation plugin.

  • Classic VU meter simulation
  • +/- 24dB of gain control
  • Smooth HP filter
  • 3-band tone shaping EQ
plugins4free.com/plugin/1215

Aqualizer ~ Open Source Digital Equalizer


Aqualizer, a computer program that can be used in order to filter sound. In fact it is a digital equalizer. However, it is an equalizer for connoisseurs, so to say, as we researched how we could improve the existing equalizer to fit the needs of DJ’s and sound designers even better.

vst.rjprojects.net/Aqualizer/home

Voxengo Marvel GEQ ~ Linear-Phase 16-Band Graphic Equalizer


Marvel GEQ is a free linear-phase 16-band graphic equalizer AudioUnit, AAX, and VST plugin with multi-channel operation support (supporting up to 8 input/output channels, audio host application-dependent) for professional music production applications.  Marvel GEQ offers extensive internal channel routing capabilities, and supports mid/side channel processing.

www.voxengo.com/product/marvelgeq

SonEQ ~ Vintage Equalizer Plugin


SonEQ is a free equalizer plugin that takes parts from some vintage gear and combines them in one.

sonimus.com/products/soneq

Foobar2000 ~ Equalizer Preset Library


A repository of additional Foobar EQ presets, .feq preset files can be loaded via View>DSP>Equalizer>Load preset 

github.com/xSwagboy69x/EQ-Presets

Thanks to xSwagboy69x Chad Manly & peterzam Peter Zam

Music Player GO ~ Android Audio Player


Home of Music Player GO, a minimal yet fully-featured local Android music player aiming at simplicity and performance.

Features:

  • Minimal interface
  • Equalizer
  • Music organised by artist, albums, songs and folders; tabs are organisable
  • Light, dark, automatic themes and accents
  • Pure black theme
  • Queue
  • Sleep timer
  • Audio focus, precise volume and headset management
  • Now playing, embedded covers, search, playback speed, pause on completion, sorting, shuffle, fast-seeking…

github.com/enricocid/Music-Player-GO
f-droid.org/packages/com.iven.musicplayergo
m.apkpure.com/music-player-go/com.iven.musicplayergo
play.google.com/store/apps/details?id=com.iven.musicplayergo

TAP-plugins ~ LADSPA Linux Plugins


Tom’s Audio Processing plugins is a selection of LADSPA plugins for audio engineering on the Linux platform. Intended for use in a professional DAW environment such as Ardour, it includes high quality reverberation, echo, eq, limiter & more.

tomscii.sig7.se/tap-plugins/index

sourceforge.net/projects/tap-plugins
github.com/tomszilagyi/tap-plugins