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    Xen-Arts intros Xen-FMTS 2 – free 4 Operator FM Synthesis VSTi


    Xen-Arts has released Xen-FMTS 2, a free 4 Operator FM Synthesis VSTi with a specialized set of features for computer musicians interested in exploring the vast expressive possibilities of making music with alternative intonation systems. Xen-FMTS 2 is a freeware 32-bit plugin instrument for Windows that includes 115 patches, 55 microtunings and 56 partials files.



    • Internally loads and externally receives both MTS (MIDI Tuning Standard) Bulk Dump and Single Note Microtuning Files.
    • Operator ratios can easily be set to values that are coincident with the microtuning being used, thereby producing intonation related sidebands in the timbre of the instrument.
    • Microtonal pitch-bend ranges may be configured in cents, harmonics and superparticular ratios.
    • Arbitrary microtonal pitch shifting makes it possible to easily pitch transpose the oscillators in both octave and non-octave increments.

    FM-RM Oscillator:

    • 4 Operator FM Synthesis with Ring-Modulation.
    • 57 Operator Algorithms.
    • 11 different Operator Waveforms.
    • Analog Pitch Drift Emulator.
    • Transposition by cents offsets.
    • Partials text files may be used to quantize the frequency ratios of the operators to user specified values.
    • Velocity-to-Harmonics Modulation enables oscillators to dynamically sound harmonics of the fundamental pitch.


    • Seven dedicated hybrid modulators for Operators A, B, C, D, Filters, Amplifier and Pitch.
    • Each modulator includes an ADSR style envelope generator, and an LFO which can be switched to run at audio-rate.
    • Each ADSR Envelope Generator features Per-Stage Keyboard Tracking.
    • LFOs can either be synchronized to the host DAW tempo or set in Hertz. They include 24 Waveforms, a Slewer and can be switched to run at audio-rate.

    Filter Section:

    • Pre-Filter Saturation Stage with 20 Saturation Types.
    • Two Independent Filters with Six Filter Types: LP4, LP2, HPF, BPF, BRF, APF.
    • One and Two Stage Filter Cascade.

    Performance Control:

    • Full controller MIDI Pitch Microtuning with MTS (MIDI Tuning Standard).
    • MTS Support for both Single Note and Bulk Dump.
    • Loads MTS Microtuning Format Files Internally and Receives MTS Externally.
    • Local (Per-Patch) and Global Microtuning (Static Microtuning for All Patches).
    • Microtunings can be loaded from any directory on hard drives or storage devices connected to the PC.
    • 12 Note Polyphonic.
    • Monophonic Legato Mode.
    • Monophonic Portamento.
    • Microtonal Pitch Bend.
    • Vibrato.
    • Effects include Chorus, Lowpass Filter Cascade (Warm Filter) with 6 dB to 48 dB per-octave filters and Stereo Ensemble.

    Xen-FMTS 2 is a freeware plugin available via Xen-Arts website.

    More info: Xen-FMTS 2 – free 4 Operator FM Synthesis VSTi

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