Comparison

MuSA_RT vs TB Spectrogram

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

Head to head
About

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.

Highlights
  • 3D tonality visualization
  • Audio analysis for pitch and context
  • Chord and key identification
  • Augmented Reality mode
  • Smooth camera rotation for unobstructed views
Read full description

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.

About

TB Spectrogram

This app provides real-time audio analysis with a spectrogram, spectrum analyzer, and goniometer. It can be used as a standalone application or as an AUv3 plugin within compatible music production hosts. Visualize your audio in detail with adjustable settings and multiple display options.

Highlights
  • Real-time spectrogram and spectrum analysis
  • Goniometer for stereo signal analysis
  • AUv3 plugin compatibility
  • Adjustable frequency and time resolution
  • Customizable color themes
  • On-screen piano keyboard mapping
Features
Read full description

ToneBoosters Spectrogram shows a real-time spectrogram, spectrum, and goniometer AUv3 plugin! We have taken the stunning visual spectrum analyzer features from our latest and greatest Equalizer Pro plugin and released it as a separate app / AUv3 plugin! The ToneBoosters Spectrogram app captures the microphone input and processes the signals in real time. To use it as a plug-in, use an AUv3-compatible host app such as Steinberg Cubasis, Apple Garageband, Audio Evolution Mobile Studio, Auria, AUM, or others. ToneBoosters Spectrogram will appear in the list of Audio Unit extensions for effect plug-ins. Key features: - Fully resizable (as AUv3 plugin) - Color themes for the user interface - Max screen support in Garageband - Adjustable color themes for UI and for spectrogram independently - Adjustable dynamic range - Adjustable frequency resolution - Adjustable time resolution - Adjustable spectral slope - Spectrogram AGC and dimming support - Show spectrogram and spectrum analyzer as overlay or individually - Spectrum analyzer also supports peak hold - Split-band goniometer for stereo signal analysis (correlation, left/right balance in one or two bands!) - On-screen piano keyboard to map spectrum analyzer to piano notes - Optimised for iPad and compatible with iPhone and iPod Touch What you should know: - Licenses acquired for this platform are not compatible with other platforms. - Audio Unit (AUv3) extensions require an iPad mini 2, iPad 4 or later models.

Screenshots

MuSA_RT2 screens
TB Spectrogram2 screens

Verdict

The call

The clearest difference is review sentiment: TB Spectrogram at 71% against MuSA_RT's 0%. TB Spectrogram also leads on ratings volume (50 vs 1) and update cadence (every 3 weeks vs every 3 months). MuSA_RT's advantage is rating (5.0 vs 4.4) and monetization model (free vs paid). On price, ads, in-app purchases and device support 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

MuSA_RT holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: TB Spectrogram has 50 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 0% of MuSA_RT's written reviews are positive against 71% of TB Spectrogram's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

MuSA_RT ships an update every 3 months, TB Spectrogram every 3 weeks. The most recent releases landed on October 5, 2026 and October 6, 2026 respectively.

Scorecard6 real differences · 4 level
MuSA_RT versus TB Spectrogram: the parameters behind the verdict, then further details
ParameterMuSA_RTTB Spectrogram
PriceFreeFree
Rating5.0 (1 ratings) — better4.4 (50 ratings)
Positive reviews0.0% of reviews71.0% of reviews — better
Number of ratings150 — better
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS15.613.0 — better
Further details — not scored
Size3 MB15 MB
Age rating4+4+
DeveloperAlexandre FrancoisToneBoosters

Customer experience

MuSA_RT

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive0.0%
Neutral50.0%
Negative50.0%

TB Spectrogram

All ratings50 ratings
Positive86.0%
Neutral2.0%
Negative12.0%
Written reviews31 reviews
Positive71.0%
Neutral6.5%
Negative22.6%

In-app purchases

None

MuSA_RT

No in-app purchases

None

TB Spectrogram

No in-app purchases

Questions

Is MuSA_RT free?
MuSA_RT is free to download, with no in-app purchases.
Is TB Spectrogram free?
TB Spectrogram is free to download, with no in-app purchases.
Which has better reviews, MuSA_RT or TB Spectrogram?
MuSA_RT is rated higher. MuSA_RT averages 5.0 out of 5 from 1 ratings, while TB Spectrogram averages 4.4 from 50 ratings.
Do MuSA_RT or TB Spectrogram have ads?
Neither MuSA_RT nor TB Spectrogram shows ads.
Which is updated more often, MuSA_RT or TB Spectrogram?
MuSA_RT ships an update every 3 months, and TB Spectrogram every 3 weeks. Most recently, MuSA_RT was updated on October 5, 2026 and TB Spectrogram on October 6, 2026.

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