Phase One

NIVIEM Phase One is a free 6-stage phaser plugin - a circuit-accurate emulation of the 1971 Maestro PS-1A Phase Shifter, the Tom Oberheim original that defined the 70s phaser sound.

INSIDE THE PLUGIN.

• True 6-stage all-pass cascade - 3 moving notches.

• Three authentic speeds - Slow 0.5 Hz · Medium 1 Hz · Fast 6 Hz — with Leslie-style ramping.

• Continuous Rate knob, 0.05–12 Hz (Modern Free)
• Tempo Sync - 15 musical divisions, including triplets and dotted figures
• Stereo Spread up to 180°, mono-compatible at zero
• Output Gain trim ±12 dB · zero-latency processing.

• Vintage Mode (authentic) and Modern Mode (enhanced)
• 30 factory presets across 7 categories · user save / delete / rename
• A/B Compare · hover tooltips with live values · double-click value entry.

• Nivipedia - an in-plugin encyclopedia, 31 articles; right-click any control for "What is this?"

• Interface styled after 1970s Lowrey organ controls.

NIVIEM AUDIO LTD - vintage hardware, built in code.

Website: https://niviem.net

Youtube Demo: {See video at top of page}

Phase One is developed by NIVIEM AUDIO LTD, an independent audio software company registered in England and Wales. Maestro and PS-1A are trademarks of their respective owners; NIVIEM AUDIO LTD is not affiliated with or endorsed by them. Phase One is an original emulation inspired by the classic hardware.