MuSA_RT vs Audio Analyzer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MuSA_RT
This app visualizes music tonality in 3D using advanced algorithms. It analyzes audio from your microphone to identify chords and keys, displaying them with a rotating camera or in augmented reality.
- 3D tonality visualization
- Audio analysis for pitch and context
- Chord and key identification
- Augmented Reality mode
- Smooth camera rotation for unobstructed views
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MuSA_RT applies music analysis algorithms rooted in Elaine Chew’s Spiral Array model of tonality, which also provides the 3D geometry for the visualization space. The app analyzes the audio signal received from a microphone to determine pitch names, maintain short term and longterm tonal context trackers, each a Center of Effect (CE), and compute the closest triads (3-note chords) and keys as the music unfolds in performance. The 3D view presents a graphical representations of these tonal entities in context, smoothly rotating the virtual camera to provide an unobstructed view of the current information. These graphics can also be visualized in an experimental Augmented Reality mode on compatible devices.
Audio Analyzer
Visualize audio in real-time with waveform and spectrum analysis. Explore historical peaks and FFT data with intuitive touch controls for zooming and volume adjustment.
- Waveform visualizer (oscilloscope)
- Spectrum analyzer
- Historical peak display
- Historical FFT
- Full-screen mode
- Zoom and swipe gestures
- Input volume adjustment
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The analyzed result of the waveform is rendered at 60FPS. The following 4 functions can be accessed: Waveform visualizer (oscilloscope) Spectrum analyzer Historical peak Historical FFT Tapping each function enters into full-screen mode and tapping once more exits full-screen mode. Horizontal zoom is only available for the spectrum analyzer. Magnification gesture (aka pinching) allows for zooming in and out, and frequency offset can be performed by swiping on the screen horizontally. Vertical swiping adjusts input volume. Coefficients are displayed in the corner. *dBFullScale 20 * log10 ( input) A demonstration is here. https://www.youtube.com/watch?v=6mDa_zCgYzE
Screenshots
Verdict
MuSA_RT and Audio Analyzer both sit at 5.0 stars, but that hides the real split: 100% of Audio Analyzer's written reviews are positive against 0% of MuSA_RT's. Audio Analyzer also leads on iOS requirement (13.0 vs 15.6). MuSA_RT's advantage is price (Free vs $3.99). On rating, ratings volume, update cadence and ads 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
MuSA_RT is free to download; Audio Analyzer costs $3.99 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 MuSA_RT against 5.0 for Audio Analyzer. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews are what separate them: 0% of MuSA_RT's written reviews are positive against 100% of Audio Analyzer's.
MuSA_RT ships an update every 3 months, Audio Analyzer every 2 months. The most recent releases landed on October 5, 2026 and October 15, 2026 respectively.
| Parameter | MuSA_RT | Audio Analyzer |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | 5.0 (1 ratings) | 5.0 (2 ratings) |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 2 — better |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Alexandre Francois | Narumi Inada |
Customer experience
MuSA_RT
Audio Analyzer
In-app purchases
MuSA_RT
No in-app purchases
Audio Analyzer
No in-app purchases
