Comparison

Viking Synth vs dspMixFx UR

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Viking Synth

This app emulates a classic monophonic analog synthesizer with advanced DSP technology. It features three variable wave oscillators, dual ladder filters, an LFO, and two modulation busses for versatile sound design. An intuitive interface and extensive preset library make it ideal for creating thick bass and rich lead sounds.

Highlights
  • Three continuously variable wave oscillators
  • Dual ladder filters (Lowpass/Highpass)
  • Multi-wave LFO
  • Two modulation busses
  • Intuitive user interface with expandable controls
  • 228 presets including Bass, Lead, and Synthwave
  • State-of-the-art DSP for authentic sound
Read full description

Viking Synth is an authentic emulation of a classic monophonic analog synthesizer. It has three continuously variable wave oscillators, two ladder filters with a Dual Lowpass or Highpass/Lowpass configuration, a multi-wave LFO, and two modulation busses. Viking Synth uses state of the art DSP technology to accurately reproduce the sound of the hardware. You get a desktop quality plug-in at an iOS friendly price. Viking Synth is an Audio Unit Extension Instrument (AUv3) that works as a plug-in inside host apps. Just open up your favorite host that supports Audio Unit Instruments and select it from the list of available Audio Units. Compatible with GarageBand, Cubasis, Auria, BeatMaker, AudioBus, AUM, Modstep, and more. The user interface of Viking Synth is designed for quick and intuitive control. Knobs and sliders expand during tweaking and are designed so the current value isn't hidden below your finger. The six pages divide the synth into logical sections that can be accessed quickly. The filter display acts as an XY pad for controlling cutoff and resonance. Simply double tap a knob or slider to reset it to its default value. Presets Viking Synth comes with 228 presets in the categories Bass, Bright Lead, Electro Bass, FX, Percussive Lead, Soft Lead, and Synthwave. The synth excels at thick bass and rich lead sounds. The 50 Electro Bass and 50 Synthwave presets were designed by renowned sound designer eXode. Presets work perfectly with GarageBand, Cubasis, and AUM. Oscillators At the heart of Viking are three adjustable wave oscillators. The continuously variable waveform knob gives the oscillators a unique sound that can’t be achieved with the fixed waveforms found in most synths. A noise oscillator provides three types of noise, one specifically modeled after the hardware. Modulation Two modulation busses and an LFO provide flexible modulation capabilities. All of the options hidden deep in menus on the hardware are immediately accessible with one tap. Filters The filters are classic transistor ladder filters modeled meticulously. Two DSP varieties are available allowing for either reduced CPU load or soft clipping plus three additional overdriven modes. The number of poles is adjustable for a wider range of filter sounds. Compare Viking to other synths: – Viking’s oscillators are free running, not sampled, wavetable based, or generated from a zero point – Viking’s oscillators use advanced techniques to avoid aliasing – Viking’s oscillators have instability, which is controllable through the tuning drift control – Viking’s nonlinear filter uses circuit modeling and provides soft clipping

About

dspMixFx UR

This application provides control over DSP features and built-in effects for compatible audio interfaces on iOS devices. It allows for latency-free monitoring and streaming mixes for music applications, utilizing effects like reverb and channel strips.

Highlights
  • Control DSP features on URX-C/UR-C series
  • DSP mixer control
  • Built-in DSP effects control
  • Latency-free monitoring
  • Streaming mix creation
  • Compatible with specific Yamaha audio interfaces
Read full description

Together with the URX22C, URX44C, UR22C, UR24C, UR44C, and UR816C audio interfaces, the dspMixFx UR-C app allows you to utilize the benefits of Yamaha’s custom-designed SSP3 DSP chip directly on your iPad and iPhone. The app enables control of all DSP features—including the DSP mixer and built-in DSP effects—on compatible URX-C and UR-C series interfaces. You can create latency-free monitor mixes and streaming mixes for a wide variety of iOS / iPadOS music applications, using acclaimed DSP effects such as REV-X reverb, Sweet Spot Morphing Channel Strip, and Guitar Amp Classics. Please note that this app is only a control application for USB audio interfaces URX22C, URX44C, UR22C, UR24C, UR44C, and UR816C. Without a UR interface it can be used in demo mode only. Find more information about the URX-C series and the UR-C series audio interfaces here: URX-C: https://www.yamaha.com/2/urx-c/ UR-C: https://new.steinberg.net/en/audio-interfaces/ur-c-series/ Key features • Control of all DSP features including DSP mixer and DSP effects on URX-C and UR-C series • Latency-free DSP-powered monitoring when connected to iPad or iPhone • Works with URX22C, URX44C, UR22C, UR24C, UR44C, and UR816C * Depending on the iPad or iPhone model for using the UR-C interfaces with iPad or iPhone the Lightning to USB Camera Adapter or the Lightning to USB 3 Camera Adapter is required.

Screenshots

Viking Synth4 screens
dspMixFx UR4 screens

Verdict

The call

The clearest difference is price: dspMixFx UR at Free against Viking Synth's $3.99. Viking Synth's advantage is rating (4.7 vs 3.7) and review sentiment (71% vs 34%). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

dspMixFx UR is free to download; Viking Synth costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Viking Synth holds the better App Store score, 4.7 against 3.7. Both are backed by a comparable volume of ratings — 41 and 10 respectively. Written reviews point the same way: 71% of Viking Synth's written reviews are positive against 34% of dspMixFx UR's.

UpkeepUpdate frequency

Viking Synth ships an update every 4 months, dspMixFx UR every 13 months. The most recent releases landed on October 26, 2026 and October 22, 2026 respectively.

Scorecard6 real differences · 4 level
Viking Synth versus dspMixFx UR: the parameters behind the verdict, then further details
ParameterViking SynthdspMixFx UR
Price$3.99Free — better
Rating4.7 (41 ratings) — better3.7 (10 ratings)
Positive reviews71.2% of reviews — better33.9% of reviews
Number of ratings41 — better10
Update frequencyEvery 4 months — betterEvery 13 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better13.0
Further details — not scored
Size11 MB57 MB
Age rating4+4+
DeveloperBlamsoft, Inc.Yamaha Corporation

Customer experience

Viking Synth

All ratings42 ratings
Positive92.9%
Neutral0.0%
Negative7.1%
Written reviews66 reviews
Positive71.2%
Neutral10.6%
Negative18.2%

dspMixFx UR

All ratings10 ratings
Positive70.0%
Neutral0.0%
Negative30.0%
Written reviews56 reviews
Positive33.9%
Neutral17.9%
Negative48.2%

Bugs and requests

Viking Synth

Reported bugs

6 issues
  • Presets not showing up
  • Presets disappear
  • App not showing in AUv3 menu
  • Settings not saving after iOS 14 update
  • Crashes when opening presets browser
Show 1 more
  • Saved presets not loading

Requested features

5 requests
  • More subtle drive mode
  • Categorized preset browser
  • Polyphony option
  • Dark mode
  • More apps from developer

dspMixFx UR

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Viking Synth

No in-app purchases

None

dspMixFx UR

No in-app purchases

Questions

Is Viking Synth free?
Viking Synth costs $3.99, with no in-app purchases.
Is dspMixFx UR free?
dspMixFx UR is free to download, with no in-app purchases.
Which has better reviews, Viking Synth or dspMixFx UR?
Viking Synth is rated higher. Viking Synth averages 4.7 out of 5 from 41 ratings, while dspMixFx UR averages 3.7 from 10 ratings.
Do Viking Synth or dspMixFx UR have ads?
Neither Viking Synth nor dspMixFx UR shows ads.
Which is updated more often, Viking Synth or dspMixFx UR?
Viking Synth ships an update every 4 months, and dspMixFx UR every 13 months. Most recently, Viking Synth was updated on October 26, 2026 and dspMixFx UR on October 22, 2026.

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