# TB Spectrogram — Spectrum visualisation plug-in > Real-time audio spectrum and spectrogram visualization AUv3 plugin. (iPhone/iPad app by ToneBoosters.) - Source: https://appshunter.io/ios/app/tb-spectrogram/id1530170842 (this page in markdown: same URL + `.md`) - Developer: [ToneBoosters](https://appshunter.io/developer/1472446500) - Category: Music, Entertainment - Price: Free - Rating: 4.40/5 from 50 App Store ratings · 31 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 15 MB - Released: 2020-09-08 - Data updated: 2026-08-25 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/tb-spectrogram/id1530170842/reviews.md ## What is TB Spectrogram? 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. ## Key features - 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 ## Recent user reviews (10 of 31) All indexed reviews: https://appshunter.io/ios/app/tb-spectrogram/id1530170842/reviews.md ### 4/5 — Help *2026-08-23* So do you know why the app might not work with some files, is there a size limit or what. ### 3/5 — Not horizontal, not linear *2026-07-26* The screenshot in the App Store showed horizontal scrolling, but it is doing vertical scrolling, and I can’t find a way to change that. Also, the frequency scale is logarithmic, and I can’t find a way to make it linear. ### 5/5 — Incredible app *2026-07-22* Holy cow, this app is great! Simple and powerful. I love interface of being able to touch the screen and see what notes are what. Love this app, great job to whoever made this. ### 4/5 — Very good and improving! *2025-12-29* The core functionality was always great - for me, it was the UI that needed some finesse. The last two updates have gone a long way towards making this the GOAT. I have but do not use 3 or 4 other spectrogram apps. Honestly, given the insistence on ultra small and narrow font (understandable given the real estate issues, but sometimes it feels excessive… nobody can read 2 pt. Arial Narrow) even making the menu close ‘X’ bigger would help. ### 2/5 — realtime color spectrum in ULTRASONIC, not here! *2025-05-01, version 1.6.1* haven’t you dev’s heard of color? like red for too loud? blue for low level? green for mid level? yellow for high input? I couldn't delete this fast enough but i did notice all the pricey apps and plugins. I guess most reviewers here thought so too. And no trials?? (good luck selling anything) ### 5/5 — Mud *2025-01-11* Absolutely brilliant at revealing nasty low and high-frequency content and therefore facilitating targeted shelving . 🙏🙏🏿👍😄 **Developer response:** Thanks for your review! ### 1/5 — Please give me an option use to audio files. *2024-10-04* I don’t know where the option to use them even is. ### 3/5 — Latest update inverted frequency *2024-08-26* Lows are high and highs are low :( **Developer response:** This was fixed quite a while ago - simply update the app to have it resolved :-) ### 5/5 — Very Helpful In Amateur Radio Work *2024-08-26* I use this Very Useful FREE Software to View Amateur Radio Signals. Thank You & 73 ve3myz james ### 5/5 — Perfect!!! *2024-08-11* My every day app)) Thank you! ## Frequently asked questions about TB Spectrogram ### What does TB Spectrogram do? TB Spectrogram provides real-time visualization of audio signals. It displays a spectrogram, spectrum analyzer, and goniometer, allowing users to see the frequency content and stereo characteristics of their audio. ### How can I use TB Spectrogram? You can use it as a standalone app by capturing microphone input, or as an AUv3 plugin within compatible music production host apps like Garageband or Cubasis. It appears as an audio effect extension. ### What are the key features of this app? Key features include real-time spectrogram and spectrum analysis, a split-band goniometer for stereo analysis, an on-screen piano keyboard to map frequencies, adjustable resolution and dynamic range, and customizable color themes. ### Is TB Spectrogram compatible with my device? The app is optimized for iPad and compatible with iPhone and iPod Touch. However, to use it as an AUv3 extension, you will need an iPad mini 2, iPad 4, or later models. ### Can I use a license purchased on one platform on another? No, licenses acquired for this platform are not compatible with other platforms. You will need a separate license for each platform you wish to use the app on. ## Version history (last 5 releases) ### 1.7.8 — 2026-05-24 This update provides significant workflow, customisation, personalisation and performance improvements: - Improved UI performance and reduced CPU load - New option to enable highlighting of UI elements that accept keyboard input - New option to customize color scheme - Improved undo/redo functionality ### 1.7.6 — 2026-05-09 - Fix visibility of frequency axis labels when piano keyboard is disabled - Improve Apple pen compatibility - Stability and efficiency improvements ### 1.7.5 — 2026-05-03 This update to TB Spectrogram provides significant workflow, customisation, personalization and performance improvements: - Improved UI performance and reduced CPU load - Improved detection of drag vs click/tap logic for UI elements - Fix an issue with manual entry of automation lane values in certain hosts - New option to enable/disable GPU refresh throttling / high frame rate rendering - New option to enable highlighting of UI elements that accept keyboard input - New option to customize UI color scheme - New option to show bar graph in spectrum analyzer - Improved undo/redo functionality - Icon refresh ### 1.7.4 — 2025-12-28 New spectrogram pause button Various stability and efficiency improvements ### 1.7.3 — 2025-09-28 Compatibility, efficiency, and stability improvements ## Apps similar to TB Spectrogram | App | Rating | Price | Category | | --- | --- | --- | --- | | [Bass Tester & Booster Pro](https://appshunter.io/ios/app/bass-tester-and-booster-pro/id941024213) | 3.9 (225) | Free | Music | | [Sound Decibel Meter-NIOSH,OSHA](https://appshunter.io/ios/app/sound-decibel-meter-nioshosha/id1571075296) | 4.5 (335) | Free | Music | | [Spectrum Analyzer: Spectrogram](https://appshunter.io/ios/app/spectrum-analyzer-spectrogram/id981810895) | 4.2 (195) | Free | Music | | [Audio Spectrum Analyzer dB RTA](https://appshunter.io/ios/app/audio-spectrum-analyzer-db-rta/id1281873790) | 4.5 (3,042) | Free | Music | | [Audio Spectrum Analyzer Pro](https://appshunter.io/ios/app/audio-spectrum-analyzer-pro/id1152352806) | 4.4 (238) | Free | Music | | [Audio / Spectrum Analyzer](https://appshunter.io/ios/app/audio-spectrum-analyzer/id1508848574) | 4.6 (1,000) | Free | Music | ## More apps by ToneBoosters - [TB Equalizer](https://appshunter.io/ios/app/tb-equalizer/id1473111210) - [TB Reverb](https://appshunter.io/ios/app/tb-reverb/id1474944185) - [TB Barricade](https://appshunter.io/ios/app/tb-barricade/id1480150563) - [TB ReelBus](https://appshunter.io/ios/app/tb-reelbus/id1482450479) - [TB Enhancer](https://appshunter.io/ios/app/tb-enhancer/id1484449791) - [TB Morphit](https://appshunter.io/ios/app/tb-morphit/id1487595036) All apps by ToneBoosters: https://appshunter.io/developer/1472446500 ## Related topics [booosters](https://appshunter.io/ios/topics/booosters) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-25.*