LDX DSP vs JP
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LDX DSP
Control your audio system directly from your smartphone. Adjust car audio in real-time and monitor technical information via Bluetooth. Explore features in demo mode if you don't have a compatible processor.
- Intuitive audio system control
- Real-time adjustments
- Technical information monitoring
- Bluetooth communication
- Demo mode for exploration
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Complete control of your audio system directly from your smartphone! The app was developed to offer intuitive control. Whether adjusting your car audio system in real time or monitoring technical information, with multiple functionalities, the application delivers a modern and connected experience through Bluetooth communication. How to use: 1. Install the app on your device 2. Activate Bluetooth 3. Turn on the compatible processor 4. Open the app and select the desired processor from the list If you don't yet have a compatible processor, activate the demo mode and explore all the features available in the app.
JP
This application emulates a legendary analog polyphonic synthesizer, offering 8 distinct analog synth voices. Users can sculpt sounds with authentic VCF and ADSR controls, utilize an arpeggiator, and split the keyboard for dual-sound performance. Built-in effects and pitch lever allow for expressive sound design on the go.
- 8 Analog Synth Voices
- Authentic VCF Control
- ADSR Envelope
- Arpeggiator with 5 Patterns
- Split and Solo Modes
- Reverb & Chorus Effects
- Pitch Lever
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An iPhone app that recreates the legendary analog polyphonic synthesizer. [Key Features] 8 Analog Synth Voices: JP-Brass / JP-Strings / JP-Warm Pad / JP-Choir / JP-Saw Lead / JP-Square / JP-Bass / JP-Bell Authentic VCF Control: Manipulate Cutoff, Resonance, and ENV in real time. Shape your sound freely by sweeping the filter. ADSR Envelope: Intuitively control Attack, Decay, Sustain, and Release via sliders. Arpeggiator: 5 patterns (Up, Down, U&D, As Play, Random) with adjustable BPM and octave range. Split Mode: Split the keyboard into two zones to play two different sounds simultaneously. Solo Mode: Monophonic operation tailored for searing lead lines and solo play. Reverb & Chorus: Add depth and space to your sound with built-in spatial effects. Pitch Lever: Perform expressively with real-time pitch bends. LFO / VCO Control: Create rich, evolving textures with modulation. [Recommended For] Fans of iconic '80s synth sounds. Music producers and DTM creators. Anyone looking to enjoy synthesis on the go. Those who love the signature "JP voice" sound. *This app contains ads. *Using headphones or external speakers is highly recommended for the best sound experience.
Screenshots
Verdict
The clearest difference is rating: LDX DSP at 5.0 against JP's 1.0. LDX DSP also leads on ratings volume (8 vs 1) and iOS requirement (15.0 vs 26.5). JP's advantage is update cadence (every 2 weeks vs every 4 months). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
LDX DSP holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: LDX DSP has 8 ratings behind it against 1, so its average is the more settled of the two.
LDX DSP ships an update every 4 months, JP every 2 weeks. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.
| Parameter | LDX DSP | JP |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (8 ratings) — better | 1.0 (1 ratings) |
| Number of ratings | 8 — better | 1 |
| Update frequency | Every 4 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 26.5 |
| Further details — not scored | ||
| Size | 78 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | STETSOM ELETRÔNICA LTDA | Kouki Yoshimoto |
In-app purchases
LDX DSP
No in-app purchases
JP
No in-app purchases
