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Serum
Most Innovative - Best Audio and MIDI Software - KVR Audio Readers' Choice Awards 2025
Serum 2 by Xfer Records is a Virtual Instrument and a Virtual Effect Audio Plugin for macOS and Windows. It functions as an Audio Units Plugin, a VST 3 Plugin and an AAX Plugin.

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30-Day: 16; 7-Day: 13; Yesterday: 35

Xfer Records' Serum 2 builds upon the groundbreaking foundation of its predecessor, aiming to be the definitive wavetable synthesizer for modern music producers. Driven by the desire to create a synthesizer that combines high-quality sound with an intuitive, visual workflow, Serum 2 empowers users to explore the depths of sound design with ease.

The core of Serum 2 remains its powerful wavetable oscillator, now refined with enhanced flexibility. The addition of Smooth Interpolation mode allows for seamless transitions between wavetable frames, while new wavetable warps and advanced modulation options open up a vast sonic landscape. Beyond wavetables, Serum 2 introduces a diverse range of oscillator types, including multisample, sample, granular, and spectral oscillators. This expanded palette enables users to replicate real instruments, manipulate audio samples in innovative ways, and delve into the realm of granular and spectral synthesis.

Serum 2's commitment to visual feedback and intuitive control is evident in its user interface. The graphical representation of waveforms and modulation routings allows for a clear understanding of the sound design process. The drag-and-drop modulation matrix simplifies the assignment of modulation sources, while the comprehensive effects rack provides a wide array of processing options.

The inclusion of a multisample oscillator with a vast library of real instrument samples adds a new dimension to Serum's capabilities. Users can now seamlessly integrate acoustic sounds into their electronic productions or create hybrid instruments by blending samples with wavetables. The sample oscillator further expands the sonic possibilities with advanced looping, slicing, and modulation features. The granular and spectral oscillators offer unique tools for manipulating audio samples, allowing for the creation of evolving textures and radical sonic transformations.

Serum 2's comprehensive feature set, combined with its intuitive workflow and high-quality sound, makes it a powerful tool for sound designers and music producers of all genres. Whether you're crafting intricate soundscapes, designing aggressive leads, or replicating the nuances of acoustic instruments, Serum 2 provides the tools to bring your sonic visions to life.

Features:

  • Wavetable Oscillator:
  • Refined with Smooth Interpolation mode for seamless wavetable morphing.
  • Advanced wavetable warps and modulation options.
  • Filtering, FM, PD, ring modulation, and distortion capabilities.
  • Multisample Oscillator:
  • Extensive library of real instrument samples.
  • Support for user-created multisamples via the sfz file format.
  • Sample Oscillator:
  • Advanced looping, slicing, and modulation features.
  • Rate control for "tape stop" effects.
  • Granular Oscillator:
  • Powerful granular synthesis capabilities.
  • Wide range of parameters for manipulating grain size, density, and pitch.
  • Spectral Oscillator:
  • Real-time resynthesis of samples at the harmonic level.
  • Transient detection processing for radical time and frequency manipulation.
  • Modulation:
  • Comprehensive modulation matrix with LFOs, envelopes, and custom curves.
  • Drag-and-drop modulation assignment.
  • Visual feedback of modulation routings.
  • Effects:
  • Integrated effects rack with distortion, reverb, delay, and more.
  • Flexible routing and modulation of effects.
  • Visual Interface:
  • Clear and intuitive graphical user interface.
  • Visual feedback of all parameters and modulation routings.

Latest User Reviews

Average user rating of 4.71 from 17 reviews
Serum 2

Reviewed By kotransact [all]
November 8th, 2025
Version reviewed: 2 on Mac

I used serum 1 for very specific wavetable things like trailer braams, aggressive nasty things and such but it was never my all-around synth I would think to go to. When Serum 2 came out that all changed and I started spending more and more time in Serum. I was blown away by the brilliance of this thing from every POV including and especially workflow. I pretty much stoped using Omnisphere and Zebra and spending 95% of my programming time in this thing. I'm not one to rave about soft synths but Serum 2 has been such a refreshingly positive experience I had to write a couple lines. On top of that I just feel the new additions have given me a real creative spark in patch programming and getting to "that point" in your ideas. Thank you Steve! Much love and respect on your development on this.

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Serum 2

Reviewed By viraven8 [all]
March 26th, 2025
Version reviewed: 2.0 on Windows

An Absolute Masterpiece Design of a Synthesizer. Perfect distance between all knobs, minimal necessary menus, many new synthesis capabilities, free update, best workflow out of any plugin I have ever used. 100/10

Serum 1 and 2 are both puzzle-boxes that have very simple and fast synthesis workflows, but also have extreme depth inside for experimenting with the infinite rabbit hole of synthesis capabilities. Serum 1's depth involved resynthesizing and perfecting wavetables, but now Serum 2 is a Hybrid Wavetable synthesizer that can resample into a Sampler/ Granulizer/ or Spectral Synthesis Oscillator. The Spectral Synthesis is especially rare among hybrid synths.

The Bad: Serum 1 was always a bit of a CPU hog, but the granular engine is especially difficult to use without being forced to bounce to sample. Also quite a few random bugs. I can't explain how to recreate them but some bugs involve having random audio spikes. The PV SVF filter feels especially bugged, as any filter I create creates a huge Bass shelf. I'm sure these bugs will be fixed, they are minimal and hardly impact the quality and performance of using 99% of the synth's features.

The Good:

New everything, a new oscillator, a second filter on the front face, second warp mode with new distortion warp modes, new spectral warp modes on spectral oscillator, new filters including a Disperser (Diffuser) that can turn into a super all-pass phaser at 50% mix. New Analog filters. Everything about the Serum 1 UI and workflow has been fixed and cleaned up nicely.

New Bode is a lushious and filthy frequency shifter that has delay feedback and a "blur" knob that I do not see in other freq shifters. Easily creates brain morphing sounds.

New Full-Modular Synthesis: Remember when Massive had a revolutionary workflow due to the ability to Drag and Drop modulation sources like LFO's/ Envelopes/ custom Seqs onto any knob? Now Serum 2 has evolved this workflow again by allowing the ability to Drag and Drop Oscillators on to any knob. Audio-rate modulation combined with quickly creating custom sequences/ LFOs/ new Chaos Modulators allow for the easiest Modular synthesis I have seen in any synth.

New Spectral Synthesis: This is the greatest new addition to the plugin. Spectral synthesis is almost like Additive synthesis by controlling partials by using a sample, however due to the diffuse and inaccurate FFT methods, some of the sounds can be messy/ cause pre-ringing/ or sound random. Spectral synthesis essentially creates the type of sounds that you would expect a cross-mix of granular and additive synths to create. There many new warp modes for this oscillator, including the ability to Mask or Vocode from another oscillator. Wavetables or custom-drawn FFT filters can be used with a cutoff control. Recorded samples can easily be dragged and dropped onto any Spectral Oscillator for deep sound design. Definitely try to experiment with this oscillator as much as possible to create new sounds that other synths have yet to create.

New Granular Synthesis: Other than the bad remark above, the granular engine is very smooth sounding and very simple to use. Audio-Rate and other easy modulation can be used to create very experimental sounds. The workflow is the fastest out of any granular engine I have used despite CPU hog.

New Sampler/Multisampler: Serum can now be a rompler taking real instrument or drum/ creative FX samples with velocity sensitive mapping.

New Arpeggiator and mini-DAW-like Sequencer: Any key played can easily be turned into a quick midi/arp with modulation and velocity sensitive mapping. The Arp section is especially useful for quickly turning sound design into actual music.

The effects can also have a 2-3 Multiband or Mid/Side FX processing section (Multipass in Serum).

Serum 2 is the new revolutionary plug-in of the decade.

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Serum 2

Reviewed By Aledes [all]
March 18th, 2025
Version reviewed: 2 on Mac

this synth is amazing, there's not much to add, you can car everything with it...and the free upgrade is a gesture of beautiful love, although of course with that same love the tip is given.... thanks Xfer.

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Serum 2

Reviewed By charlio [all]
March 25th, 2023
Version reviewed: 1.35 on Windows

For me this sounds too digital with no character. The FX are not the best but seems many people using it just for the easy interface and the fame that it has. If you need something easy try it, if you are more purist or what something less "digital" try u-he, roland cloud, discodsp, or some arturia plugins.

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Serum 2

Reviewed By HGC [all]
December 11th, 2020
Version reviewed: 1.308 on Windows

Serum is a great soft synth. I'm not big on sound design yet, so what I do is I get presets, look at how they're made, and learn from there. If you're interested, they also have it on Rent To Own via Splice for $10 a month...definitely worth it.

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Comments & Discussion for Xfer Records Serum 2

Discussion
Discussion: Active
Vospi
Vospi
16 September 2014 at 5:51pm

Wow.

PUSHA
PUSHA
17 September 2014 at 11:44am

DAMN!!!! I AM EXCITED TO TRY THIS THANG OUT!!!!! ANY RELEASE DATE INFO?

bitcrusher
bitcrusher
17 September 2014 at 12:55pm

yes, there's an annoucement now here http://www.kvraudio.com/news/xfer-records-announces-serum-wavetable-synthesizer-for-mac-and-win-vst-au-and-aax-27366.

release is planned for this Friday.

powermat
powermat
18 September 2014 at 2:01pm

Still planning on a release, tomorrow? :D.

bitcrusher
bitcrusher
18 September 2014 at 8:41pm

all systems go.

krismiller1982
krismiller1982
19 September 2014 at 1:41pm

Following the countdown on Facebook... Several hours have past since Steve said it would be released.... Take my money already!!!!.

wickermanxxx
wickermanxxx
10 October 2014 at 7:26pm

Based purely on synthesis, this is my favorite soft synth yet.

digiteaser
digiteaser
24 November 2014 at 10:11am

Definitely a good pick. Xenos' review above is a nice resource for getting an idea.

THIS POST HAS BEEN REMOVED

yoshi303
yoshi303
21 March 2015 at 7:48pm

hello, im new on forum... willing to buy serum for my sounds... :)

1+- how do u set LFO amount ? (for pitch there coarse pitch assignable i saw... but for other thinks ?)

2- how do u decide the LFO start at this frequencie... and not random ? (free LFO mode like sylenth possible ?)

AWESOME SYNTH... my next buy. plz respond ^^ thx in advance <3.

yoshi303
yoshi303
21 March 2015 at 7:59pm

also how i do random and S&H waveform with LFO ?

powermat
powermat
24 May 2015 at 12:28am

you may want to try his website for questions xferrecords dot com.

stunkit
stunkit
14 July 2017 at 12:36am

Can I consider this Synth as the best one on the market for now?

ubailey
ubailey
9 January 2018 at 3:09am

I love this synth.

Fraggle
Fraggle
1 March 2019 at 1:40pm

After 20 years of trying and buying most of the big synths (and some cheaper ones) I now only use Serum and (occasionally) zebra 2.8. The versatility of Serum is breathtaking.

so_____wet
so_____wet
14 December 2021 at 7:05pm

Great synth, but not sure if I should replace it with pigments for something different.

Fraggle
Fraggle
19 March 2022 at 10:12am

What gives Serum timeless longevity is the wavetable editor - being ablee to design any tone, and that tone being made by your own ideas, means infinite and limitless potential for TONE design - It's about the TONE not the 'sound' -

Violet666
Violet666
25 February 2025 at 3:41pm

Vital is free and is better.

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