audiobriefs
8:30in productionCh. 1 · Rack, polyphonic, orange/ 8:30 · ceiling 15 min
Synths & drum machines · Instruments

Waldorf Microwave XT

The Microwave XT is not a vintage curiosity — it’s a knob-per-function command centre for acid bass and PPG textures.

The Waldorf Microwave XT is a 1998 rackmount synthesizer using digital wavetable and FM synthesis, featuring 44 real-time control knobs, 20-bit DSP functions, and 10-voice polyphony expandable to 30; it shares its engine with the Microwave II and Wave synths, excels at emulating PPG sounds and generating acid or Moog-style bass, and includes onboard arpeggiator, digital effects, and MIDI-transmitting knobs.

Chapters & takeaways4
  1. 0:49
    Rack, polyphonic, orange

    It is a polyphonic rack synth that merges the Wave’s power with the Microwave II’s compact layout.

  2. 2:17
    Knob-laden heaven

    Forty-four knobs give instant control — and every one sends MIDI.

  3. 3:23
    Wavetable + FM = squelch

    It builds sounds from 64 waves — and specialises in acid, Moog bass and PPG emulation.

  4. 5:02
    Same engine, sharper interface

    Its 20-bit DSP runs the same engine as the Microwave II and Wave — no new architecture, just refined control.

Worth your time?

Yes. Use the whole thing.

4/ 5
What works
  • acid bass lines
  • PPG-style wavetable textures
  • Moog-style bass tones
  • real-time FM timbral shifts
What does not
  • offer analog circuitry
  • include sample playback
  • support more than 30 voices natively
  • feature a built-in sequencer
Use it if
  • studio producers needing tactile wavetable control
  • live performers routing MIDI from knobs
Skip it if
  • modular users wanting deep CV routing
  • analog purists seeking warm filters or oscillators
The written brief1 min read

What it is and what it was built for

It is a 1998 polyphonic rackmount synthesizer built to deliver expressive, performance-capable wavetable and FM synthesis in a compact, knob-dense package.

How it works, in terms a player would use

It is a rackmount synthesizer with 44 real-time knobs for editing wavetable and FM synthesis. All knobs transmit MIDI. It uses digital wavetable synthesis and FM synthesis with 64 waves. Its engine is the same as the Microwave II and Wave synths.

What it does better than anything else

It does real-time wavetable and FM sound design better than most contemporaneous rack synths — thanks to 44 dedicated knobs, immediate MIDI control transmission, and direct access to 64 waves for mixing and morphing.

What it does badly

It does not offer voice count beyond 30 without external hardware. It offers no analog oscillators, filters or amplifiers. It has no built-in sequencer beyond arpeggiator. Its 20-bit DSP functions do not extend to sample playback or granular synthesis.

What people made with it

People made squelchy acid-303 lines, boomy Moog bass and PPG-style wavetable textures with it.

Who should use it, and who should not

A studio producer or live performer who needs tactile, MIDI-mappable wavetable and FM synthesis in rack format should use it. A modular synth user seeking deep patchability or an analog purist seeking warmth should not.

Is it worth your time

It is worth your time if you need hands-on, performance-ready wavetable and FM synthesis in a rack format — especially for acid bass, Moog-style bass or PPG-style textures. It is not worth your time if you need more than 10 voices without expansion, deeper modulation routing, or analog signal path.

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