Comparison

GSDSP Quantum Filter vs luapsel

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

Head to head
About

GSDSP Quantum Filter

This audio effect plugin offers analog-modeled filters with flexible routing and dynamic modulation for creative sound design. It provides extensive control over tone shaping and complex filtering with various filter types and configurations.

Highlights
  • Analog-modelled filters
  • 11 filter modes
  • Series and parallel routing
  • Dynamic modulation support
  • Stereo and dual mono modes
  • MIDI control integration
Features
Read full description

Analog warmth meets flexible routing and dynamic modulation in a filter workstation built for creative sound design. Analog-Modelled Filters Quantum Filter uses resonant, analog-modelled filter designs that behave smoothly and musically across the entire spectrum. With no cramping, stepping, or digital artefacts, the filters remain stable even under rapid modulation. At high resonance settings they can reach self-oscillation, similar to classic hardware circuits. Filter Types & Routing Choose from 11 filter modes, including Lowpass, Highpass, Bandpass, Notch, Shelving options, Bell, and Ladder Lowpass in 1–4 pole configurations. Combine filters in series (up to three stages) or parallel (up to two), resulting in over 2,000 possible routing combinations for detailed tone shaping and complex layered filtering. Built for Modulation Designed to handle fast, artefact-free modulation, Quantum Filter responds cleanly even under rapid parameter changes. Its stability makes it suitable for dynamic environments, rhythmic modulation, or complex movement across multiple filter stages. Stereo and Dual Mono Switch between stereo and dual mono modes to shape the stereo image. In dual mono mode, left and right channels can move independently, enabling asymmetric movement, wider imaging, or separate modulation paths for each side. MIDI Control Quantum Filter integrates ADSR & AR modulators that respond directly to MIDI, allowing envelope-driven filter motion that behaves like a synthesizer’s filter section. This integration adds expressive control for rhythmic gating, animated sweeps, and dynamic shaping based on your playing or sequencing. Quantum Filter is an AUv3 audio effect plugin compatible with Logic Pro, AUM, Cubasis, GarageBand and many more. A Desktop version is also available for Windows and macOS (VST3 / AU / AAX). More information here: https://gs-dsp.com/products

About

luapsel

Create calming electric guitar ambience with reversed samples and built-in effects. Offers polyphonic playback, multiple articulations, and real-time sound shaping tools for unique musical textures.

Highlights
  • Polyphonic reversed guitar sounds
  • Round Robin sampling
  • Multiple articulations
  • Built-in delay, reverb, chorus
  • Real-time low-pass filter
  • ADSR Release control
  • Standalone samples available
Features
Currently charting
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luapsel: Unique Evolving Electric Guitar Ambience luapsel is a collection of Electric Guitar samples, meticulously multi-sampled in Round Robin and reversed in the most transparent way possible to offer your projects an easy-to-use calming vibe. Play around with built-in delay, reverb, and chorus effects, or go au naturel. Sound design is a breeze with real-time filters, release control, and tuning options. Get luapsel for free inside Decent Sampler or just enjoy the raw samples, or grab the new improved app for just $1. Features -Polyphonic reversed guitar sounds -Round Robin sampling for nuanced playback -Four articulations: Original, Looped, Fast, & Slow -Built-in delay, reverb, and chorus effects -Real-time low-pass filter (Tone) -ADSR Release control and real-time sampling tuning -Available for Decent Sampler or as standalone samples

Screenshots

GSDSP Quantum Filter3 screens
luapsel3 screens

Verdict

The call

The clearest difference is price: luapsel at $0.99 against GSDSP Quantum Filter's $14.99. luapsel also leads on update cadence (every 6 days vs every 5 weeks) and chart position (#189 vs unranked). GSDSP Quantum Filter's advantage is rating (5.0 vs 4.5). On ratings volume, ads, in-app purchases and monetization model 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

GSDSP Quantum Filter costs $14.99 and luapsel $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

GSDSP Quantum Filter holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 3 and 4 respectively.

UpkeepUpdate frequency

GSDSP Quantum Filter ships an update every 5 weeks, luapsel every 6 days. The most recent releases landed on September 22, 2026 and September 7, 2026 respectively.

Scorecard4 real differences · 7 level
GSDSP Quantum Filter versus luapsel: the parameters behind the verdict, then further details
ParameterGSDSP Quantum Filterluapsel
Price$14.99$0.99 — better
Rating5.0 (3 ratings) — better4.5 (4 ratings)
Positive reviews100.0% of reviews—
Number of ratings34 — better
Update frequencyEvery 5 weeksEvery 6 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank—#189 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.012.0
Further details — not scored
Size77 MB101 MB
Age rating4+4+
DeveloperGustav ScholdaOSC Audio

Customer experience

GSDSP Quantum Filter

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

luapsel

All ratings4 ratings
Positive75.0%
Neutral25.0%
Negative0.0%

In-app purchases

None

GSDSP Quantum Filter

No in-app purchases

None

luapsel

No in-app purchases

Questions

Is GSDSP Quantum Filter free?
GSDSP Quantum Filter costs $14.99, with no in-app purchases.
Is luapsel free?
luapsel costs $0.99, with no in-app purchases.
Which has better reviews, GSDSP Quantum Filter or luapsel?
GSDSP Quantum Filter is rated higher. GSDSP Quantum Filter averages 5.0 out of 5 from 3 ratings, while luapsel averages 4.5 from 4 ratings.
Do GSDSP Quantum Filter or luapsel have ads?
Neither GSDSP Quantum Filter nor luapsel shows ads.
Which is updated more often, GSDSP Quantum Filter or luapsel?
GSDSP Quantum Filter ships an update every 5 weeks, and luapsel every 6 days. Most recently, GSDSP Quantum Filter was updated on September 22, 2026 and luapsel on September 7, 2026.

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