SX1000 vs QuadroSphere
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SX1000
This app faithfully emulates a vintage analog synthesizer, offering musicians hands-on control. It expands upon the original with polyphonic mode, a sub-oscillator, and integrated effects.
- Faithful emulation of JEN SX1000
- Polyphonic mode
- Sub-oscillator (-3 octaves)
- Integrated arpeggiator
- Four flexible effects
- AUv3 and Standalone support
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SX1000 is a faithful emulation of the JEN SX1000, a vintage Italian synth released in 1978. The SX1000 was one of the earliest affordable analog synthesizers, designed for musicians seeking hands-on control without breaking the bank. We have carefully emulated the SX1000’s M110 chip, and also expanded its capabilities by adding features like polyphonic mode, a sub-oscillator (down to -3 octaves), and additional controls for legato modes. We’ve also integrated an arpeggiator borrowed from a vintage classic polysynth and enhanced the sonic possibilities with four effects featuring flexible routing. Available as AUv3 and Standalone.
QuadroSphere
This audio plugin allows musicians to sculpt immersive soundscapes by controlling stereo placement and effects across four distinct frequency bands. Create dynamic, atmospheric audio with automated movement and morphing between saved settings.
- 4 configurable frequency bands
- Control stereo separation, level, and pan per band
- Create and morph between 12 snapshots
- Modulation control for automated sweeps
- Per-band effects (Haas, Delay, Reverb, Chorus, Compressor)
- Convert mono to pseudo-stereo
- MIDI CC control
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QuadroSphere is a great tool for bringing an instrument to life by creating a soundscape with a constantly moving sound source. QuadroSphere splits the incoming audio signal into 4 distinct coloured frequency bands using the frequency bar. Each band has an associated coloured sphere allowing you to control the pan, stereo separation and volume level. You can use this plugin as a way to impose subtle control over stereo placement with little or no movement, or go crazy with random automation. Adding effects such as reverb or delay on a specific frequency band can help create a lush atmospheric swirling which surrounds the listener. This is great for musicians trying to create minimalistic ambient or tranquil soundscapes. You can create up to 12 snapshots of the sphere parameters and effect settings, then morph between them at a designated speed (measured in beats). You can also enable continuous randomization mode, and have full control over which spheres and control which parts are automated. You can also use QuadroSphere as a stereo splitter, using the additional outputs to add your own effects to band outputs. Key Features: ○ 4 Configurable frequency bands. ○ Control stereo separation, level and pan for each band. ○ Create up to 12 Snapshots. ○ Morph between various panning, width and frequency band levels. ○ Modulation control for automated sweeps around pan center. ○ Convert MONO signals into a pseudo-stereo image. ○ Per band Haas, Delay, Reverb, Chorus and Compressor. ○ Allows combined and individual per-band audio outputs. ○ Continuous randomized morphing of the stereo field. ○ Built in Preset Manager with drag and drop support. ○ Power and Solo for each band. ○ Controlable morph speeds. ○ Various animated transition modes. ○ Access most options using AU parameters or MIDI CC control.
Screenshots
Verdict
The clearest difference is price: QuadroSphere at $6.99 against SX1000's $19.99. QuadroSphere also leads on update cadence (every 3 weeks vs every 12 months) and review sentiment (100% vs 91%). On rating, ratings volume, ads and in-app purchases 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
SX1000 costs $19.99 and QuadroSphere $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for SX1000 against 5.0 for QuadroSphere. Both are backed by a comparable volume of ratings — 10 and 10 respectively. Written reviews are what separate them: 91% of SX1000's written reviews are positive against 100% of QuadroSphere's.
SX1000 ships an update every 12 months, QuadroSphere every 3 weeks. The most recent releases landed on November 4, 2026 and November 11, 2026 respectively.
| Parameter | SX1000 | QuadroSphere |
|---|---|---|
| Price | $19.99 | $6.99 — better |
| Rating | 5.0 (10 ratings) | 5.0 (10 ratings) |
| Positive reviews | 90.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 10 | 10 |
| Update frequency | Every 12 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 30 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | AudioThing Ltd. | 4Pockets.com |
Customer experience
SX1000
QuadroSphere
In-app purchases
SX1000
No in-app purchases
QuadroSphere
No in-app purchases







