Comparison

JAX Unisonic (Audio Unit) vs Seyfert

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

Head to head
About

JAX Unisonic (Audio Unit)

This audio unit generates up to 8 additional voices from any audio input by multiplying and shifting pitch. It simulates analog synthesizer unison effects for fattening sounds and adding presence, with individual voice transposition capabilities.

Highlights
  • Generates up to 8 additional voices
  • Multiplies and shifts audio input pitch
  • Simulates analog synthesizer unison effects
  • Individual voice transposition (+/- 1 octave)
  • Time domain pitch shifting (low latency)
  • Panorama spread for voices
Features
Read full description

JAX Unisonic is a special Audio Unit, able to produce up to 8 additional voices from any audio input (also polyphonic audio) by multiplying and shifting it in pitch and other parameters. Audio Units require a host application for operation. The concept of JAX Unisonic is loosely derived from ‘Unison’ which was adopted from the ancient analog synthesizer world, where manufacturers and sound designers intended to fatten the sound by multiplying and stacking available voices together. Also digital synthesizers did adopt this technique to fatten sound sources. Due to the instability of analog oscillators and components and some wilful detuning, an interesting sonic effect is achieved, giving the produced tones significantly more presence and life. Unison voices are still excessively used in modern music styles today. (In classical music compositions ‘unisono’ basically means a performance, where multiple instruments or voices play the same parts in an ensemble fashion.) Technical Now JAX Unisonic can simulate this sonic effect with any audio source by incorporating a bank of independent time domain pitch shifters, that are optimized to detune and spread artificially multiplied voices in panorama. It can be understood as a kind of super chorus generator or an ensemble like effect with variable, realtime controlled intensity and pitch relation. But it is clearly something more. With JAX Unisonic you can create up to 8 additional voices, that will be passed thru a chain of pitching and positioning, creating massively fattened sounds with any kind of voice input. Additionally you may transpose each voice individually per semitone to max. +/- 1 octave, something that cannot be achieved with usual choruses, unison or ensemble effects and moves the results slightly in the direction of the category “harmonizer” effects. Although the harmonic results can be programmed (automated) freely and are not auto generated in any way, as on some available other harmonizers. The used pitch shifters in our JAX Unisonic are NOT based on the phase vocoder paradigm (FFT) and do not introduce the static latencies, which are unavoidable by the latter. A time domain pitch shifter in contradiction, uses very small delay buffers, where the latency is dynamically adjusted (dependent on the used pitch shifting amount) and much smaller and nearly latency-free. Such pitch shifters are better situated for live usage therefore. Although, such pitch shifters sound slightly more raw and tend to produce disharmonic overtones with more extreme values. Usage JAX Unisonic may be used as a massive unison effect generator or more decently for creating various, more subtile effects for improving sonic qualities of parts in a composition. For instance controlled voice detuning, manual pitch correction, doubling of vocals or solo instruments or just to give some boring voices more interest and static sound some special movement. It is even usable with drums, adding subtile or even massive new frequency components.

About

Seyfert

This music effect plugin creates unique echoes that orbit and revolve around the listener. It offers advanced control over pitch, depth, and tone for each echo, with a built-in reverb and EQ for a rich soundscape. It functions as a standalone app or an Audio Unit for music production software.

Highlights
  • Orbital echo generation
  • Spin and Doppler pitch-bend effects
  • 3D binaural imaging
  • Octave shimmer and transpose
  • Per-echo tone and drive
  • Echo-focused reverb and EQ
  • Standalone and AUv3 support
Features
Currently charting
Read full description

Seyfert is a delay unlike your others: every echo spawns at its own place in an orbit around you, and the whole constellation slowly revolves. Turn up Feedback and you don't just add repeats, you spawn more echoes into the orbit, from a single tight slap to a dense, spiralling cloud. Spin revolves the whole field around you. Doppler bends the echoes in pitch as they whirl toward and away. 3D wraps them around your head on headphones. Lift the repeats an octave into crystalline shimmer, drop them a sub-octave for weight, or detune them into a chorus. A lush reverb blooms around the echoes, never the dry signal, so your source stays clear while the repeats dissolve into space. Features: - Orbital echoes, where Feedback sets how many circle you - Spin, from a gentle drift to a full whirl - Doppler pitch-bend as the orbit turns - 3D binaural imaging for headphones - Shimmer and transpose, up or down one octave (octaves, fifths, sub-octaves) - Per-echo Trail tone, tape Wobble, and Drive - Lush reverb applied to the echoes - Full 5-band EQ on the wet signal - Orbit and Ping-Pong patterns, tempo sync - 18 factory presets, plus save your own - Standalone app and Audio Unit (AUv3) for GarageBand, AUM, Logic, and more No accounts, no tracking, no data collected. Everything stays on your device.

Screenshots

JAX Unisonic (Audio Unit)4 screens
Seyfert3 screens

Verdict

The call

The clearest difference is review sentiment: Seyfert at 100% against JAX Unisonic (Audio Unit)'s 44%. Seyfert also leads on rating (5.0 vs 3.9) and price ($1.99 vs $9.99). JAX Unisonic (Audio Unit)'s advantage is ratings volume (9 vs 3) and iOS requirement (12.0 vs 15.0). On ads, in-app purchases, monetization model and device support 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

JAX Unisonic (Audio Unit) costs $9.99 and Seyfert $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Seyfert holds the better App Store score, 5.0 against 3.9. Both are backed by a comparable volume of ratings — 9 and 3 respectively. Written reviews point the same way: 44% of JAX Unisonic (Audio Unit)'s written reviews are positive against 100% of Seyfert's.

UpkeepUpdate frequency

JAX Unisonic (Audio Unit) ships an update every 5 days, Seyfert every 2 days. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.

Scorecard7 real differences · 4 level
JAX Unisonic (Audio Unit) versus Seyfert: the parameters behind the verdict, then further details
ParameterJAX Unisonic (Audio Unit)Seyfert
Price$9.99$1.99 — better
Rating3.9 (9 ratings)5.0 (3 ratings) — better
Positive reviews44.4% of reviews100.0% of reviews — better
Number of ratings9 — better3
Update frequencyEvery 5 daysEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank—#190 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size40 MB3 MB
Age rating4+4+
DeveloperJens GuellKonstantin Torsten Schutz

Customer experience

JAX Unisonic (Audio Unit)

All ratings9 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews9 reviews
Positive44.4%
Neutral22.2%
Negative33.3%

Seyfert

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

JAX Unisonic (Audio Unit)

No in-app purchases

None

Seyfert

No in-app purchases

Questions

Is JAX Unisonic (Audio Unit) free?
JAX Unisonic (Audio Unit) costs $9.99, with no in-app purchases.
Is Seyfert free?
Seyfert costs $1.99, with no in-app purchases.
Which has better reviews, JAX Unisonic (Audio Unit) or Seyfert?
Seyfert is rated higher. JAX Unisonic (Audio Unit) averages 3.9 out of 5 from 9 ratings, while Seyfert averages 5.0 from 3 ratings.
Do JAX Unisonic (Audio Unit) or Seyfert have ads?
Neither JAX Unisonic (Audio Unit) nor Seyfert shows ads.
Which is updated more often, JAX Unisonic (Audio Unit) or Seyfert?
JAX Unisonic (Audio Unit) ships an update every 5 days, and Seyfert every 2 days. Most recently, JAX Unisonic (Audio Unit) was updated on November 3, 2026 and Seyfert on November 6, 2026.

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