After all, who doesn't like a spicy hot Lil' Bottom every now and a then?

https://dawjunkie.com/free-bass-synth/

 

TubeOhm - Free Download and News

NEWS: Shruthi MIDI controller, Ambika Midi controller, Vocoder Vox Populus and T-Xciter/Ngate are now freeware.
The software can be downloaded here.

The instruments may also be used free of charge for commercial music.
Selling the software instruments is prohibited. Publication in a booklet CD only with permission of Tubeohm Instruments .


Announcement

All sales will be discontinued from 01.01.2025.
I would like to thank my customers for their loyalty over the years and hope that you had a lot of fun with my instruments.

Maybe I will write a few more software synthesisers. Maybe Freeware or Demos. This will then be published on KVR.
The site will remain online for the time being as the circuit diagrams and information may still be required.

23.12.2024 TubeOhm

 

Last edited: Oct 28, 2025

Diffusia free drone synthesizer by Full FX Media | Nov 3, 2025



Full FX Media has announced the release of an immersive drone synthesizer plugin for Windows, Mac and Linux.

Designed for artists and sound designers seeking deep, evolving textures, Diffusia
generates rich tonal layers and atmospheric soundscapes with effortless control.

Diffusia features

• 6-voice polyphonic engine.
• Multiple waveform selection for shaping unique timbres.
• Amp envelope for expressive dynamics.
• Unison mode for thick, wide sound design.
• Resonant filter for sculpting and shaping your tone.
• Warm chorus for added depth and width.
• Built-in effects like tremolo, chorus and reverb.

The plugin is free to download in VST3 and AU foramts.

More information: Full FX Media

 

Image-In is a polyphonic synthesizer that generates sound by scanning an image. It uses a form of wave terrain synthesis where the brightness of an image's pixels is interpreted as an audio waveform. The path used to scan the image is defined by three independent "Readers", each tracing an elliptical shape.

The shape, position, and orientation of these ellipses can be freely adjusted and modulated by a flexible system of LFOs and ADSR envelopes. This allows for the creation of complex, evolving timbres and rhythmic patterns derived directly from visual information.

Features:

• Image-Based Synthesis: Load any PNG or JPEG image to use as a sound source. The visual characteristics of the image directly influence the timbre of the sound.
• Triple Ellipse Readers: Three independent readers scan the image, each with its own set of parameters (position, radii, angle, volume, pan, detune). Their outputs are mixed together to form the final sound.
• Extensive Modulation:
  • 4 LFOs: Each with multiple waveforms, tempo-sync capability, and phase control.
  • 3 ADSR Envelopes: For shaping the amplitude and other parameters over time.
• A comprehensive modulation matrix allows you to route LFOs and ADSRs to almost any reader parameter, including its geometry, volume, pan, and filter settings.
• Per-Reader Filtering: Each reader has its own multi-mode filter (Low-Pass, High-Pass) to further shape its sound.
• Interactive UI:
  • An interactive display shows the loaded image and the reader paths.
  • Drag handles directly on the display to manipulate the center, radii, and angle of the ellipses.
  • Real-time visualization of parameter modulations.

• Preset System: Comes with a set of factory presets and built-in factory images to get started.

Image-In by FX-Mechanics is a Virtual Instrument Audio Plugin for Windows and Linux. It functions as a VST Plugin and a VST 3 Plugin.

Free Download: https://fx-mechanics.com

 

R.Hoffmann (1999) TS - 404 v1.05 Beta - Standalone (Works in Windows 11)

R. Hoffmann is the man behind Synapse Audio!

"Virtual Analogue Synth"

Transistor Synth 404 is a virtual analogue, multitimbral synthesizer for Windows 95/98.
You can use it to create fat basslines, melodies or just noise in true TB-303 (ReBirth) fashion.

FEATURES:

- 4 generators
- 2 oscillators per generator
- Freely link generators (so you can easily build 8-oscillator-sounds!)
- 4 waveforms (saw, 303-saw, square, sine) + 1 user waveform per oscillator
- Oscillator Mix, Oscillator Sync & Phase Adjust
- Pulse Width
- Filters: 12/24dB Lowpass, 12dB Highpass and Bandpass with variable Cutoff and Resonance
- Ring Modulator
- Frequency Modulation (FM)
- LFO on Pitch, Resonance or Cutoff
- ADSR + Step gate to cut notes
- 2 distortion types for each generator
- 1 delay unit
- Step Sequencer with Shift up/down/left/right
- Random/algorithmic pattern generator

This is a really nice piece of software. Although it's not directly related to HammerHead, the two programs complement each other great. It only has a few drawbacks, the most irritating is probably that you can't save realtime knob and slider movements and that you're limited to one pattern (16 ticks). The stream to disk option is also quite limited, it only saves one measure and can only save to RAW (a format HammerHead users should be familliar with). This can of course be worked around by using Windows' Sound Recorder (or any other suitable software) to record the sound "live".

This software is provided without any help file or manual, so you'll have to figure things out by yourself :-(
Version 2 of this software in underway. In addition to a lot of cool new features it will also have a new graphical user interface instead of this "Win95 standard" look. I have no idea if the new version will be free or not though.

Free Download
https://xperience.neocities.org/OldMusicSoftware or http://www.threechords.com/hammerhead/dloads/ts404.zip

 

And here's a 9 minute TS 404 jam I found.
Those were the days