Transistor Synth 404 is a virtual analogue multitimbral synthesizer that uses DirectX. It features all basic concepts of an analog synthesizer: 2 Oscillators (VCO), LFOs, a filter unit (VCF) and an ADSR section (VCA). Additional features include Oscillator Sync, Pulse Width, FM, a Ring Modulator, Distortion, and some fx (delay in V1.x). A step sequencer lets you easily edit the notes.

Although the program works in real-time, there is no MIDI control, so all parameters must be set with the mouse and keyboard. The author mentions that this might be added in a future version.

Features

• 4 generators
• 2 oscillators per generator
• freely link generators (so you can easily build 8 osc sounds!)
• 4 waveforms (saw, 303saw, square, sine) + 1 user waveform for each 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/right/left
• Random pattern generator (not purely random, sometimes it generates good stuff)
• Stream output to disk as a RAW file

NOTE: There is currently no manual, so you'll have to figure things out by playing around with the software and possibly reading The Sonic Spot's Sound Synthesis Guide.

Requirements

• Windows 95/98
• Pentium processor
• Microsoft DirectX
• 800x600 or higher display resolution