P565 Siren Filter Set


The P565 Siren Filter Set is a merge for the perfect workflow of highly coveted filters from different hardware audio equipment with a unique signature sound that makes it a Pulsar Modular product.
P565 Siren features high and low pass filters with selectable slope and tunable musical resonance that brings you into the realm of some of the most sought after resonant filters and beyond. It also features two notch/peak filters designed for precise adjustment and creative expression. Each of these filters can be dynamically modulated based on an external input signal or the built-in dual envelope followers with fine control over attack, release, amount and speed characteristics. These features accumulate to a powerful creative use that ranges from subtle movement to funky rhythmic enhancement while still covering phasing, flanging and resonance sweeps.
P565 Siren doesn’t stop there. Use the drive to give body, character and dimension to any sound or warp it into overdrive, taking your sound to where no overdrive has gone before!


  • Transformer based emulation.
  • Continuously variable high and low pass filters featuring 12/24 dB/oct slope with resonance  or a signature 18 dB option.
  • Two continuously variable 20 Hz to 20 kHz band filters that can be configured as reject filters or pass filters (option to switch to King Tubby style step filters).
  • Configurable envelope follower to modulate the filter frequency selections.
  • Drive and overdrive options.
  • Intelligent, vintage or HD oversampling options.


Audio Examples

Artist Reviews


Supported Plugin Formats
AU, VST3, AAX (Apple Silicon ready).

Supported Operating Systems
macOS 10.14+
Windows 7+

Apple Silicon M1 Native and Intel CPU (Universal 2 Binary)

x64-compatible CPU

System Requirements
Display resolution: 1440 × 900px or 1280 × 960px or higher
Memory: 2 GB RAM

Copy Protection
A one-time challenge & response over the internet. License works on up two separate machines.


Latest User Guide


For previously authorized computers

  • Expanded the Delay circuit and moved to a dedicated Lower horizontal menu bar.


  • Enhanced Drive Circuit and compensation.
  • Clip Indicator and circuit.


  • v2 with upgraded internal engine for a more musical experience.
  • All parameters are accessible from within the GUI.
  • P565 SIREN is the new name of the plugin and will not replace your v1.
  • Free upgrade to all P565 users- please use the same auth. license code.
  • New Alt. LFO circuit with extremely musical resonance sound.
  • BIAS parameter added.


  • Master Volume Screw
  • Update Drive Circuitry
  • Delay on Wet or Dry Signal
  • New presets by Synthient Sound
  • Updated GUI


  • Minor bug fixes.
  • Updated resonance gain to reach self oscillation.
  • Better Wah guitar pedal emulation.
  • Please restart computer after installation.


  • M1 compatible.
  • Please restart computer after installation.
  • Funk MU engine implemented.
  • Side-Chain implemented.
  • Addictive!





40-Day Free Demo

To start your 40-day fully functional demo for 2 computers, Press the "DEMO" button and complete the checkout. Follow the instructions you will get by email. No dongle required.

(21 customer reviews)

Superb sounding with enormous sonic possibilities.

With every full version purchase, a gift of custom handmade real calf hide wallet (lighter, softer and finer grain than cowhide) made here in Türkiye by a local artisan shop.


Customer reviews

21 reviews for P565 Siren Filter Set

5.0 Rating
1-5 of 21 reviews
  1. Oooooh it’s beatyful,i would just put a trim on the big knobs,that would be really helpfull

  2. Siren called to me…

    There were so many surprises with Siren that I was not expecting. Of course the filters sound fantastic and the resonance has been implemented very musically. Using it for acoustic guitars has been a pleasure in that it excels at gently carving out the boomy frequencies and generously highlighting the exact harmonic spectrum that you want to hear.

    A lot of fun begins when you engage the envelope filters. This is my favorite for funking out bass guitar. You get more control than say the classic Mu-Tron III. I’ve found some envelope filter sounds that are so dang quacky and in your face. It gets all the liquid-rubbery bubble you’d want for staccato guitar.

    The big surprise for me was the drive section. It has two modes: a subtle saturation (as transparent as the ‘b’ in subtle) which serves great for as mixing/mastering saturator as well as for drive on a bass, guitar, or synth).

    The second overdrive mode is high gain and will destroy drums (in a good way, of course!). The two drive modes really help bring out definition for bass and guitar and I regularly use Siren as an overdrive. Moving the drive after the filters allows for the filters to shape the character and saturation amount of the drive. Putting them after allows them tone shaping. It kills for guitar solos!

    Siren is also perfect for warming up soft synths. Not all soft synths are made the same, but I find you can make even mediocre ones come to life by running them into Siren and adding a light amount of drive and then shaping the EQ with the filters afterwards.

    The GUI is easy on the eyes and makes for a pleasant work flow and just a great vibe for spending time using it. Pulsar Modular regularly updates their plugins and does a great job of listening to users.

  3. Loving the color this adds to full mixes! Thanks guys!

  4. Best product on the market love the variable high pass filters.

  5. I make techno and filters are an absolutely essential tool for me in shaping my tones. In terms of pure sound, the P65 Siren is the best filter plugin I have ever heard. I own and use the SoundToys FilterFreak, Audio Damage Filter Station, Softube Mutronics Mutator, and the Softube Overstayer M-A-S Extended which also has resonant lowpass and highpass filters. These plugins all have useful features, but the P65 Siren destroys them in terms of analog authenticity.

    Where most filter plugins fall apart is with the sound of the resonance. The resonance on the SoundToys FilterFreak for example has a very thin and grating sound to it. As anyone who has used analog synths knows, the resonance is a crucial component to getting those deep and huge sounds, to fatten up your kick drum, synth bass etc. The resonance on the P65 Siren sounds fantastic and very very analog. In fact, it reminds me very much of my Electrix Filter Factory, which is my favorite hardware analog filter. Try opening up the HPF to about 31 on a kick drum and then dial in the resonance. You will get an incredibly fat and analog sound.

    With the other filter options like bandpass, notch, etc, this is a very versatile tone shaping plugin. The Drive also has a very unique and aggressive sound, perhaps even too aggressive for some, but certainly useful for electronic music.

    The only improvements that I could suggest are, it would be nice to have LFOs, and the ability to sync the tempo of the modulation to the tempo in your DAW. The Overdrive feature also is extremely aggressive and I think some sort of wet / dry control would be useful. While this plugin does not have as deep a feature set as some others like the SoundToys Filter Freak, it more than makes up for it with the authentic analog sound, which is what I look for in a plugin, and is what Pulsar Modular totally delivers with all their plugins. I also strongly recommend the P42 Climax and the Lunar Lander – they’re both fantastic and the support from Pulsar Modular has also been amazing! Keep up the great work guys!!

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