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Last updated on: 2026-05-16
Android Apps > Music & Audio > mr spectra
mr spectra icon

mr spectra

2.31
Sumanta Raha
4.37
82 reviews
10,000+
Downloads
Free

FFT Audio Spectrum Analyzer with Weighting Filters. Enjoy as a Music Mood Light.

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mr spectra is an FFT-based audio spectrum analyzer with built-in strobe lights and weight filters (A-, C-, and Z-weighting) that turn music into a dynamic mood light. Rated 4.37 from 82 ratings, this free MUSIC_AUDIO app is not ranked in any top list and shows 10,000+ total downloads with 18 in the last 30 days.

Pros & Cons

  • FFT-based real-time analysis provides immediate visual feedback
  • Integrated mood lighting through customizable strobe lights
  • Weighting filters (A/C/Z) enable nuanced sound analysis
  • Flexible visuals with multiple scopes and customizable color/display options
  • No explicit real-time RTA, octave analysis, or calibration workflow listed
  • Only device microphone input is documented; external mic support is not specified
  • Not ranked in any top lists

About mr spectra

mr spectra is a music & audio app developed by Sumanta Raha.

Download Statistics

mr spectra has been downloaded 13 thousand times. In the last 30 days, the app was downloaded 18 times.

User Ratings

mr spectra is rated 4.37 out of 5 stars. The rating is based on 82 ratings.

App Information

mr spectra is FREE to download. The APK download size is 2.01 MB. The latest version available is 2.31. The last update was on July 26, 2025.

Technical Requirements

mr spectra requires Android 6.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play August 2020.

Description
mr spectra is an fft based audio spectrum analyzer with strobe lights and built-in weighting filters (A-weighting for human hearing, C-weighting for machine sounds and Z-weighting with no filter).
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More data about mr spectra

Price Free to download
Total downloads 13 thousand
Recent downloads 18
Rating 4.37 based on 82 ratings
Ranking Not ranked
Version 2.31
APK size 2.01 MB
Number of libraries 14
Designed for Android 6.0+
Suitable for Everyone
Ads Contains ads

App Performance Report

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Google Play Rating history and histogram

51
12
12
4
0

Downloads over time

mr spectra has been downloaded 13 thousand times. Over the past 30 days, it has been downloaded 18 times.

Changelog of mr spectra

  • Jul 26, 2025UpdateVersion 2.31
  • Jun 5, 2025UpdateVersion 2.30
  • Apr 21, 2025UpdateVersion 2.20
  • Aug 13, 2024UpdateVersion 2.11
  • Feb 26, 2024Installs10,000+ installs
  • Nov 19, 2023UpdateVersion 2.02
  • Aug 21, 2023UpdateVersion 1.48
  • Nov 1, 2022UpdateVersion 1.47
  • Nov 9, 2021Installs5,000+ installs
  • Oct 19, 2021UpdateVersion 1.46
  • Aug 19, 2021UpdateVersion 1.45
  • Jun 26, 2021UpdateVersion 1.43
  • Jun 7, 2021UpdateVersion 1.42
  • May 6, 2021Installs1,000+ installs
  • Mar 11, 2021Installs500+ installs
  • Feb 16, 2021UpdateVersion 1.41
  • Jan 14, 2021UpdateVersion 1.3
  • Dec 31, 2020Installs100+ installs
  • Dec 1, 2020Installs50+ installs
  • Aug 29, 2020Installs10+ installs
  • Aug 2, 2020New AppVersion 1.1 in MUSIC_AUDIO for Free
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Developer information for Sumanta Raha

Sumanta Raha

contact@msraha.in

Website

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Comments on mr spectra for Android

★★★★★ Khaled Akbar · Feb 26, 2023
I hope devs will install options for audio internal output not only mic output coz dog barkin and cock crowing will enter the simulation process thank you for the app devs
★★★★★ Khaled Akbar · Aug 21, 2021
Awesome visualizer it brightens my life Thank you for the response I just forgot to look at the Settings recently 😮🧡🧡🧡 may I suggest the scopes must be color white or gray and has switched for mic or audio internal and background pick up gallery thanks
★★★★★ Jason Collins · May 30, 2021
I really like this app. It's especially fun to watch the app while playing music on my phone. I do have to say this app is very accurate with the dB reading. I work at the airport and fueling an Airbus 320 with the airpacs running is at 82dB. My BAFX Decibel meter/Sound pressure wave meter reads the same as this app on my Samsung S10e Android 11. I personally wish I could see a widget or live screen saver if that makes any sense. I love the colors. I want to write more, but I'm at my limit.
★★☆☆☆ Robin Sparrow · Apr 27, 2022
Limited frequency range: only goes up to 4000Hz, and you can't adjust it. Frequency range is also locked to a linear scale when it always makes more sense to display frequency logarithmically.
★☆☆☆☆ Robert Struzinski · Aug 3, 2025
What good is an audio spectrum app that goes only to 4kHz? Try SOUND ANALYZER APP, it's the only free audio test app that works correctly, you'll need to use an external test tone, but they're free in other apps.

Google Play Rankings for mr spectra

This app is not ranked

Technologies used by mr spectra

mr spectra is requesting 7 permissions and is using 14 libraries.
Show details
Trust & Safety: Permissions include android.permission.ACCESS_NETWORK_STATE, android.permission.FOREGROUND_SERVICE, android.permission.FOREGROUND_SERVICE_MEDIA_PROJECTION, android.permission.INTERNET, android.permission.POST_NOTIFICATIONS, android.permission.RECORD_AUDIO, and a dynamic receiver permission (in.msraha.mrspectra.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION). This set supports background audio processing and updates, but users should review microphone usage and background activity during installation.
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