RX-79
sung ju KIM Music iPhoneiPadiPod touch
RX-79 is a paid Music app for iPhone and iPad by sung ju KIM. Requires iOS 15.0. Updated October 24, 2026.
- Price
- 9.99 USD
- on the App Store
- Size
- 25 MB
- Age 4+
- Updated
- Oct 24
- 2026 · v1.0.1
Screenshots
About RX-79
Play the wind synth you know with a whole new set of sounds. Warm woodwind tones for a soft ballad, bright synth leads for a bold solo. RX-79 is a breath synthesizer that turns your wind controller and iPhone or iPad into a full sound module. Saxophonist SJsax shaped every sound and every response by actually playing it. [Find the right sound for every song] 41 built-in sounds. 14 acoustic sounds including soprano, alto and baritone sax, clarinet, oboe, flute, trumpet, euphonium and harmonica, and 27 electric sounds including brass, leads and basses. Play the same melody in many different moods. Tap the preview button in the sound list to hear a sound even without a controller. [Fit it to your breath] Adjust breath sensitivity, response curve, attack and decay, and set breath noise, tonguing and note-to-note connection to match your playing style. [Make it your own] Shape each sound with brightness, resonance, drive, vibrato, delay and reverb. Save the settings you like to the USER list and give them names. Saved sounds stay on this device. [SJ PACK: 10 signature sounds, sold separately] Extra sounds that carry SJsax's playing feel. Before buying, you can play each sound yourself for 30 seconds. Note: SJ PACK is an in-app purchase sold separately from the app (one-time purchase). [Connection] Connect a USB MIDI wind controller. RX-79 responds to breath (CC2, CC11, aftertouch), pitch bend and vibrato (CC1). Depending on the ports and power needs of your controller and iPhone or iPad, you may need a separate cable or adapter, such as a USB camera adapter. Sound plays even with the silent switch on, and you can play along with backing tracks from other apps. No internet connection required. No personal data is collected. Connection and support https://sjsax.com/rx79/
What’s new
Version 1.0.1 · Updated October 24, 2026
- New sounds including Sweet Bari, Sweet Harmonica and Trumpet 2 (41 built-in sounds) - SJ PACK now has 10 sounds - Jump between the Acoustic, Electric, SJ PACK and USER lists with the buttons at the bottom - Saved sounds go to the USER list. Press and hold the display to rename one - Open the list and tap PLAY to preview a sound - Tap the left or right half of the OCTAVE pad to shift octaves, even while playing - Plug in your controller and play right away, no app restart needed - Quick start guide and 6 languages
App privacy
The developer, sung ju KIM, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
Alternatives to RX-79
Looking for apps like RX-79? Here are 6 similar apps on the App Store. The highest rated is SWAM Bass Clarinet (5.0/5), and 2 of the 6 are free to download.
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SWAM Bass Clarinet
5.0
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GSi Piano Studio
5.0
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IFW - Wind Synth
2.3
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SWAM Oboe
5.0
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SWAM Soprano Sax
3.5
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Harpejii Instrument
1.0
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| RX-79 | – | 9.99 USD | October 24, 2026 | |
| SWAM Bass Clarinet | 5.0 / 5 (1) | 29.99 USD | Oct 8, 2026 | Compare |
| GSi Piano Studio | 5.0 / 5 (1) | 19.99 USD | Oct 15, 2026 | Compare |
| IFW - Wind Synth | 2.3 / 5 (3) | Free | Aug 26, 2025 | Compare |
| SWAM Oboe | 5.0 / 5 (2) | 29.99 USD | Oct 8, 2026 | Compare |
| SWAM Soprano Sax | 3.5 / 5 (2) | 29.99 USD | Oct 8, 2026 | Compare |
| Harpejii Instrument | 1.0 / 5 (2) | Free | Apr 30, 2025 | Compare |
Compare RX-79 with the top alternatives: ratings, updates, ASO score and keyword gaps →