Signaldust is a one-person audio software project run by a developer based in Helsinki, Finland, focused on digital signal processing and sound synthesis delivered as VST plugins for Windows. The project's stated emphasis is on hand-tuned algorithms and original DSP ideas, with deliberate use of non-linearities and noise where they reinforce the subjective character of a sound rather than simply chasing technical transparency.

The Signaldust catalog spans both effects and instruments, including the Tila2 and Abstract Chamber reverbs, the 4L2 and TSClip limiters, the Dust Equalizer channel EQ, the Dust Bucket stereo chorus, the Sweep morphing filter, the IRDust impulse response loader, and the Dust Analyzer spectrum analyzer. On the instrument side, the developer has released the Dolphin Bassline synthesizer and the Dancing Boy synth, alongside utilities such as the Dust Arp 32 polyphonic arpeggiator. Most plugins have been distributed as free downloads.

The project keeps a low commercial profile and is best known within DIY plugin and KVR Audio forum circles, where users discuss its reverbs and limiters in particular. The same developer also maintains open-source C++ and DSP tooling on GitHub under the signaldust handle, including the DustFFT FFT routines and the dust-toolkit application framework.

Signaldust has 2 products cataloged on Equipboard, including EQ Plugins and Filter Plugins. Their gear is featured by 1 artist, with the strongest followings in Electronic. Notable users include Sakuraburst.