BlackHole is a modern macOS virtual audio driver that allows applications to pass audio to other applications with zero additional latency.

existential.audio/blackhole
github.com/ExistentialAudio/BlackHole
BlackHole is a modern macOS virtual audio driver that allows applications to pass audio to other applications with zero additional latency.

existential.audio/blackhole
github.com/ExistentialAudio/BlackHole
DVD-Audio Decoder input plugin and Watermark Detector / Neutralizer DSP plugins for Foobar2000. Decoder is capable of playing back DVD-Audio discs, ISO images, AOB, MLP and Dolby TrueHD files in full resolution. Dedicated plugin for DTS-HD playback. APT-x100 plugin for *.AUD and *.AUE files from DTS movie / trailer discs.
sourceforge.net/projects/dvdadecoder
References:
wiki.hydrogenaudio.org/Foobar2000 Components DVD_Audio_Decoder_foo_input_dvda
Simple component for foobar2000 to fix CUE/FLAC problems
.cue file that links to timestamps in a base .flac/.wav/.ape file..cue files that point to missing files (.flac/.wav/.ape etc).* Remove “*.CUE” from preferences>shell integration>exclude file types
github.com/RevenantX/foo_cuefixer
hydrogenaud.io/index.php/topic,117167.0
hydrogenaud.io/index.php?topic=118978.msg981682#msg981682
This is a multi-platform Commodore 64 emulator specialized for sound reproduction. It is also a SID player for music collections like HVSC and CGSC. It is a full C64 emulator and can play games of the GameBase64 project as well.

haendel.ddns.net/~ken
sourceforge.net/projects/jsidplay2
Java SIDPlay2 Online
Step into music production with KOMPLETE START – a curated selection of studio-quality instruments, effects, utilities, loops, and samples for the low price of nothing at all. Play over 2,000 customizable sounds – drums and percussion, bass, acoustic instruments, synths, pads and atmospheres, effects, and more. And did we mention it’s free?

www.native-instruments.com/en/products/komplete/bundles/komplete-start/
EasyQ is an easy-to-use equalizer with an arbitrary number of filter stages in series connection. Each of the filter stages can operate in one of the following modes: peak/cut (aka bell or parametric EQ), high- or low-shelving, notch and low- or highpass (both with either 6 or 12 dB/oct slope). EasyQ is also easy on the CPU and just does what an EQ is supposed to do without performing any additional voodoo. As such, it is well suited to serve as a go-to EQ for the routine equalizing tasks.
Key Features:
- unlimited number of filter stages (“bands”)
- each stage can be one of the following characteristics: bell, low-/high-shelf, low-/highpass (6 or 12 dB/oct), notch
- clean equalization – no additional colorations
- low CPU usage
- +-48 dB gain range
- stereo modes: linked, left/right, mid/side and mono
- minimum phase response

The SpatGRIS is a plugin (Mac AU/VST and VST Windows format) designed to compose multichannel space. It allows the user to spatialize the sound in 2D (up to 16 speakers) or in 3D (up to 128 speakers) under a dome of speakers (with the ServerGRIS, available also on SourceForge). It includes two audio modes, — Free Volume and PanSpan — and one OSC mode. SpatGRIS is a fusion of two former plugins by the GRIS: OctoGRIS and ZirkOSC with a lot of new features. Automated Trajectories are included. It is possible to control it from external controllers such as Joystick, iPad or Leap Motion.
Features:
- Three modes: Free Volume, Pan Span, OSC Spatialization
- Automated Trajectories
- Up to 16 outputs in audio mode
- OSC Mode to control the ServerGRIS
- External controllers: Joystick, iPad. Leap Motion

MAnalyzer is an advanced spectral analyzer and sonogram containing unique features such as smoothing, normalization, super-resolution, prefiltering and deharmonization. The included meters provide a peak meter and EBU R128 and ITU-R BS 1770-3 compliant loudness meter.

DarkIce records audio from an audio interface (e.g. sound card), encodes it and sends it to a streaming server.
DarkIce can record from:
DarkIce can encode in the following formats:
DarkIce can send the encoded stream to the following streaming servers:
Classic game sounds in VST form. As heard in late 80s / early 90s sound cards. Powered by DOSBox emulation.

bsutherland.github.io/JuceOPLVSTi
github.com/bsutherland/JuceOPLVSTi
TempoPerfect is a free software metronome. Unlike mechanical metronomes, our software metronome provides a clear and precise beat that won’t wind down, making it an essential tool for any musician.
- Simple and intuitive interface
- Highly accurate beat simulation
- Accent the first beat in a measure
- Preset tempos include Largo, Allegro, Presto and more
- Visual beat indicator bar provides a helpful visual cue
- Create accurate beat patterns for simple or complex rhythms
- Subdivide beats to hear difficult patterns, such as triplets
- BPM Tempo Guide chart for each speed of music (e.g., Allegro=120-168)
- Subdivide beats into accented beats and regular beats to emphasize different patterns
- Use on your computer or as a metronome app on your mobile device
- TempoPerfect also includes a tempo guide within the program which is a helpful resource for remembering the BPM for particular speed markings (e.g., Allegro).

A SoundCloud player that lives in your menubar.

gillesdemey.github.io/Cumulus
github.com/gillesdemey/Cumulus