Bugs and feedback to: email@example.com
-FFT resolution from 32 to 65536
-9 window algorithms to reduce spectrum leakage
-fast pause/resume button
-day or night mode
Note that amplitude value is not displayed because would cannot be accurate without calibration for your device.
The output is a display in the form of an image that represents the frequency spectrum of the audio as it changes in time. Intensity is plotted on a rainbow log scale. Red represents a strong signal, blue a weak signal. A linear gray scale is also included.
Options are available via the Android Menu key. The user may toggle a grid to overlay the spectrogram. The spacing between vertical lines is 2000 Hz.
This spectrograph collects 1024 samples at a sampling rate of 44,100 Hertz every 150 milliseconds. Each collection of 1024 samples corresponds to a single horizontal line in the display as shown in the actual screenshots. A moving set of gridlines is added just ahead of the most recent horizontal line of data so the user can measure frequency. These lines are 2 KHz apart.
The Spectrogram frequencies may be verified by using the AndWaves AudioGenerator software to play tones or by playing a YouTube video of test-sounds (free) at: http://www.youtube.com/watch?feature=player_embedded&v=i_M46ysxMEg
The feature graphic on the Android Marketplace shows the “sound prints” of various activities, including those of cricket chirping. The phone itself seems to introduce an noise into the spectrum around 10 and 12 KHz, as well as thin lines at 7,200 and 14,400 Hertz.
Have fun looking at the “sound prints” of ordinary things. To learn more about frequency spectra see the one-page tutorial on our website, https://sites.google.com/a/andwaves.com/www/home/about-fourier-transforms
The program uses the new Google licensing standard. In theory this means the program can be copied to an SD card, freeing up internal memory in the Android, although I haven’t tried it.
If you need help or would like to discuss your application, I will be happy to spend a few minutes with you on the phone (321.252.8205).
☆ Ads Free!!.
-I seen a couple of 1 star rating and they never gave a reason. If so please give reason why so that I can fix it. Thanks.
UltimateAudio Lite is an app that specialized in analyzing the science of sounds. The app act as a RTA and spectrum analyzer and tone generator. This app combine all my other sound apps into one. What you will get are Spectrum, ActivePinger, ISpectral, Signal Generator and IGram. If you are an engineer professional, engineering students, oceanographer, bird watching enthusiast, musician, pianist, guitar and speaker tuning, or interested in signal processing.
A simple spectrum bar graph displaying the frequencies and sound pressure level (SPL) with intensity colormap.
ActivePinger is an App that generates acoustic waveform commonly used by sonar (submarine, bat) and displays the results in real-time. Depending on your surrounding environment, you can see the reverberation after pinging. Unlike most Apps, ActivePinger is actually two Apps combined into one: Signal Generator and Spectrogram display. There are six waveform to choose from: Continuous Wave(CW), Coxcomb, Geometric Comb, Costas Waveforms, Pseudorandom waveform(PRNG) and Hyperbolic Frequency Modulation(HFM) waveform. This tool is great for students and professional engineers studying in the field of sound and vibration since you can see the results of the pinging waveform in real-time.
ISpectral is a fast and accurate real-time FFT analyzer that displays spectral waveform from microphone audio. The app stores a 10 second window history for further in-depth analysis.
IGram is spectrogram version of ISpectral. With this app you can see a spectrogram longer history.
Generator signal tone. We will add more features in the future.
☆ Save or read .wav audio file
☆ Has bin resolution of 1 hz, which is one or the only app with the FFT size of 44100
☆ Can be Linear or Logarithmic scale
☆ Matlab like colormaps.
☆ Digital Filter: Low-pass, High-pass and Bandpass Filter
☆ Selectable microphone input.
☆ Two crossbars for easy readout and calculating the deltas
☆ Zoom in or out for viewing data at high resolutions.
☆ Three displays: Time-Domain and Frequency-Domain 2D graph and a spectrogram.
☆ Also a signal generator
☆ Signal conditioning such as averaging or setting data threshold trigger.
☆ The ability to take screen capture and send email
☆ Able to adjust color intensity display to filter certain amplitude
☆ Can export data to .csv formatted file
☆ And many more features!
Keep up with Idroidbot:
Idroidbot’s Web site: https://www.idroidbot.com
Idroidbot Support: email us at firstname.lastname@example.org for a refund or new features you would like to see.
See our other apps: ActivePinger, IGram, ISpectral
(If you need a more fully featured RTA, with 1/1, 1/3 and 1/6 octave display, RT60, Noise Criteria, A&C Weighting etc. combined with a signal generator, please take a look at my "AudioTool" app in Android Market.)
plus recording and post-processing-routines ,
plus mechanical (pocket) watch regulation (timing machine) ala beat-counting.
- 10s max recording (but unlimited real-time analysis).
- Limited sampling-rate, transform-size, octave-band options.
- No file support (saving/opening WAV files).
- Up to 48kHz sampling rate on some devices.
- Multiple FFT transform-sizes and windowing functions.
- Multiple spectrogram views (amplitude, power, dB) and color palettes.
- Axis labels (time/frequency).
- Additional real-time views:
+ 1/3 octave-band spectrum (Pro version offers 1/1 - 1/12)
+ Level meter
+ Beat-counter "timing machine" (mechanical pocket watch regulation via regulator)
+ Integrated spectra (loudness) with beat-markers
- Post-processing routines:
- Save/open WAV files (pro version only).
- Inverted UI orients primary mic forward for improved audio response.
PLEASE READ THE INCLUDED DOCUMENTATION OR EMAIL ME IF YOU HAVE PROBLEMS.
The version history has a complete list of recent changes.
IMPORTANT: it shows spectrum only for internally played music but not for FM radio or mic, if you have any problems, email me.
Some devices or music players may have problems (really not all), so try free version first.
Make from your phone or tablet a spectrum analyzer for your music.
It show frequency spectrum of music played from your favorite music player running in the background.
Frequency spectrum is shown in logarithmic scale on X approximately from 43Hz to 22kHz and on Y from 0 to -50dB.
from settings menu you can change:
- color theme (11 themes)
- number of channels (from 16 to 96)
- configure bars and peaks speed
- orientation (landscape, portrait, by sensor, ..)
and by long pressing the display you can switch fullscreen mode.
This app is paid version of "Spectrum Analyzer", with some enhancements.
thanks for buying.
Accurate real-time measurement feature allows detection and analysis of live audio. Spectrograms can be saved as png or jpg files to sd-card.
Bugs and feedback to: email@example.com
Thank you everyone for making this the top spectrum analyser application on the market. I am dedicated to making this app work well for you! Risk-free purchase; I will refund your money (even beyond Google's 15 min window) if the app does not work for you.
* Both Logarithmic & Linear frequency axis
* Smooth, joyful pinch-to-zoom! Pinch to zoom in on ANY signal section... and zoom... and zoom...
* Pan (vertical and horizontal) by simply dragging the screen
* Dynamically adjusting FFT size, up to 16384 bins (for 2-3 Hz accuracy!), based on the optimal size for your screen.
* Exponential averaging (adjustable)
* Peak hold overlay
* Share screen snapshots easily
* Range set - full audio range from 20Hz, up to 22kHz!
* Peak & valley measurements with crossbar tools
* Adjustable dB levels for ceiling / floor
* And many more!
Designed & tested to work on Honeycomb, Gingerbread, and Froyo.
If you have ANY problems with this release, or requests - email firstname.lastname@example.org. I *will* respond, and work towards fixing your issue. And if I can't fix it, I will give you a full refund.
The screenshots show some of the dynamic zooming capabilities, and the linear vs logarithmic modes. The first screenshot shows the analyser in linear mode, while the next shows logarithmic. The screenshots show the mic on the OG Droid phone capturing a test tone at 21kHz, in addition to other frequencies. Nice real-time analyzer!
The last two screenshots show a zoomed in signal at the lower frequency range - same signal sample (paused again), with two different windows applied.
I am honoured and humbled by each and every purchase made; thank you!
Email for contact is email@example.com
Thank you everyone for purchasing - the response has been great! I appreciate all the encouraging emails.
Purchases are risk free - I offer refunds past the 15-minute window if it does not work on your hardware for some reason.
H/W Updates across all versions:
All reported hardware issues have been resolved - these are listed below for documentation:
Fix for Toshiba Thrive, and Dell Streak mic input issue.
Fix for Samsung Captivate (Galaxy S SGH)! Thanks for the report Red Baron - if this update fixes your problem, I would appreciate an update to your review.
Contains workaround for the Atrix phone hardware microphone issue. UPDATE: Fix confirmed! Thank you Motorola engineering for the workaround.
My goal is to make a useful spectrum / spectral analyser tool for audio professionals, engineers, installers, etc. Signal processing is useful in many fields, from microphone analysis to RTA, to engineering / technical fields. Let me know how you use it! I find it fascinating the different uses.
Here are the permissions the app requests, and why:
To capture audio from the Microphone to display
Save the graph to an image, and send it via email.
Please feel free to email me with any questions, concerns, requests, etc. I love feedback: firstname.lastname@example.org
ProSpec is a Real time spectrum analysis tool. It generates a spectrogram on the fly and supports 8kHz, 16kHz, 22kHz and 44.1kHz sampling frequencies.
You can record, playback, save and share the spectrogram. In addition you can change some audio analysis settings. It provides a maximum frequency tracking facility with measurements both in dBFS and SPL (dBA).
Other features include:
- Time scale in seconds
- Real time waveform
- Update speed
- Dynamic range control
- Offline spectrogram analysis tool
- Real time zooming (So you can zoom right in on a frequency)
- Complete color customisation
- RGB option
- For audio engineers, an invert feature for live events in dark rooms
- Snapshot feature allowing you to share, view or save the generated spectrogram externally
- Audio tool, allowing you to share, save and listen to the complete audio that has been recorded (apart of the off-line spectrogram analysis)
- Saving, sharing and exporting the configuration
NOTE: If you are not satisfied or find any issues with ProSpec, please tell me in the discussion group before leaving negative feedback, I may be able to resolve your issue in an update and your input will be invaluable to ProSpec's evolution. Thanks!
home theatre, audio engineer, car audio, linguistics, speech pathology, electronic engineer, tech savvy musicians, engineering and audiologist students
- Up to 4Hz resolution at 8kHz sampling frequency (Adjustable FFT size from (256-2046)
- Uses a moving window to calculate the FFT Magnitude spectrum
- Analysis Windows: Hamming, Hanning, Blackmann and Rectangular
- Frame length adjustable from 10-100ms
- Frame shift fixed to 14ms
- Dynamic range: -1dB to -90dB
- Bandwidth available: 50Hz - 22.05kHz
- Selectable update time from (10-40s)(also depends on frame length)
- Zoom up to a 50Hz region
- JET RGB color scheme (and many many many others)
WORD FROM THE DEVELOPER:
I developed this tool to use personally and I believe it has some use to others in the community. ProSpec also has some major advantages over other real-time spectrogram apps available in the same price bracket. e.g time scale (x-axis labels), frame length, real time frequency zooming, saving settings and sharing the audio and images, SPL, off-line spectrogram analysis, and maximum frequency tracking. These are all features I wanted a single tool to have, ProSpec has been developed to accommodate my needs and hopefully yours.
NOTE ABOUT SPL:
The SPL calculation includes a calibration dB offset. An offset of 0dB is my current calibration for a Motorola Atrix running Android 2.3.4. However, your device will no doubt be different and hence will display the incorrect value. To calibrate properly read the user manual.
Tested Devices (Better suited for dual core devices):
Motorola Xoom with Android 4.0.4 (Good)
Samsung Galaxy S III with Android 4.0.4 (Good)
Sony Xperia S with Android 4.0.4 (Good)
Motorola Atrix 2 with Android 2.3.6 (Good)
HTC Desire HD with Android 2.3.5 (A bit slow)
Motorola Atrix with Android 2.3.4 (Good)
HTC Incredible S with Android 2.3.5 (A bit slow)
As seen above the performance of ProSpec depends to some extent on the hardware of each device. I have done my best to support as many devices as possible, and will continue to do so.
BUGS AND REPORTS:
If you find any bugs or issues please e-mail me (email@example.com) and include what you were doing at the time the bug occurred so I can fix it. If it happens I can't support your device I WILL REFUND YOUR MONEY.
Like image was synthesised from accumulating sin waves into an audio file.
No ads. Full version.
512 up to 8192 frequency divisions (1024 to 16384 FFT size).
22 kHz spectrum range (can reduce down to 1 kHz for higher resolution).
Auto-scale or pinch to zoom, drag to pan.
Linear or logarithmic scales.
Peak frequency detection (polynomial fit).
Averaging, Min and Max.
Save CSV data files (uses Write External Storage Permission).
Free or snap to peak cursor .
Musical note indicator (green if within 5 cents, orange if within 10 cents).
Auto-scaling microphone input trace.
For best response on slower single core devices, keep the FFT size low.
It is very easy to use and offers a lot of useful features: high RTA refreshing rate and frequency resolution, adjustable sound pressure level scale (up to 150 dB), RTA peak hold function, flat reference line, local peaks...
RTA measurement can be recorded on 3 separate channels. User can later compare SPL and frequency response charts between the channels.
It also includes a signal (tone) generator, which helps us measuring the frequency response of a sound system.
Input/output can be adjusted to Internal, AUX or Bluetooth. However, all I/O options and combinations do not work on all devices.
Microphone can be accurately calibrated for each frequency band separately.
Click on the wave area to change FFT size between 512, 1024, 2048 and 4096
Click on the right of the sonogram area to change the colors
Click on the left of the sonogram area to change zoom mode (full range, half range, quarter range)
Click on the spectrum area to switch between linear frequency / log frequency (amplitude always in log scale). This will affect also the sonogram.
Totally Free, no advertising
If you like it, buy the Donate version for extra features and future improvements:
- FFT Size up to 16384
- Overlap FFT for faster/smoother experience
- Better color scale and scale displayed on screen, ...
Keywords: Sound Analyser, Audio Analyser, Spectrum Analyser, Audiogram, Sonogram,
In SEA Lite You can Record, analyse, distort, enhance and modify audio, giving you the ability to hear and see each step you take.
Join other users on the discussion forum to discuss your ideas and sort out any bugs you have come across:
Or join the Facebook community:
#### Tested Devices (Better suited for dual core devices) ####
Motorola Xoom with Android 4.0.4 (Good)
Samsung Galaxy S III (Quad core, AU release) with Android 4.0.4 (Good)
Sony Xperia with Android 4.0.4 (Good)
Motorola Atrix 2 with Android 2.3.6 (Good, must have sdcard installed)
HTC Desire HD with Android 2.3.5 (A bit slow)
Motorola Atrix with Android 2.3.4 (Good)
HTC Incredible S with Android 2.3.5 (A bit slow)
#### BUGS AND REPORTS ####
Apologies for incompatibilities on devices other than the ones listed above. If you find any bugs or issues please e-mail me (firstname.lastname@example.org) and include what you were doing at the time the bug occurred so I can fix it.
#### Description #####
SEA lite frequency analysis has a selectable resolution from 128 to 4096 bands, between 0-4 kHz. This tool is great for audio engineers, anyone with a background in linguistics (phonology or phonetics), cognitive psychology (psycholinguistics), speech and music analysis or Digital Signal Processing (DSP). It is a useful tool for off-line frequency analysis of acoustic signals and a powerful educational aid for students in those fields of study.
You can record, distort, enhance and modify your own voice, giving you the ability to hear and see each step you take.
One of the frequency analysis tools available is the
spectrogram. The spectrograms generated in SEA are very high resolution, allowing the user to observe harmonics and the fine structure of their recordings.
Initially it was designed for students and researches in Electronic/Electrical Engineering, however, anyone can try their hand at using it.
It incorporates some past and present state-of-the-art speech enhancement algorithms which allow you to filter out noisy signals and see and hear the result of these algorithms first hand. Some of these algorithms are currently used in some telecommunications systems.
You can quickly make changes and share them with colleagues or teaching staff via e-mail, Blue-tooth and any other supporting image or sound transfer services. All spectrograms and frequency plots are zoom able via an image viewer.
Complete list of features in V2.0.1:
- complete spectrogram analysis
- complete short-time magnitude analysis
- Distort recorded audio with different noise types from -30dB to +30dB
- Additive noise types include:
+ White noise
+ Babble (human voice)
- Exporting of configuration as txt file
- Short-Time Fourier Analysis on all generated audio
- Real time amplitude recording
- dBFS scale on all spectrograms
- Viewing and sharing of all images and audio
- The following Advanced filters:
+ spectral subtraction
+ Frequency Wiener filter
- The following acoustic modification methods:
+ Unit Magnitude
+ Random Phase
+ Zero Phase
- Peak frequency tracking
- Generate spectrogram png files
- Generate .wav files
- comprehensive help and documentation
- Video tutorials
This Application analyses audio data captured from the microphone and shows live updates of either the temporal waveform (scope mode) or the frequency spectrum (fft mode) on the display.
An app for everyone who wants to explore the sound that surrounds him.
Use it to:
*) find out at which frequency there is a feedback when rehearsing or playing a concert with the band
*) find out how high you can whistle
*) uses full screen size for graph display
*) independently zoom and drag display graph in x and y direction (use one finger only)
*) labeled x and y scales with auto-adapting tick marks when dragging or zooming
*) portrait or landscape display orientation
*) run/pause button for analysing the data in detail
*) toggle between scope and fft mode while running or paused
*) peak indicator, highlighting the most prominent peak in the spectrum
*) frequency readout display (in Hz) of the most prominent peak in the spectrum
*) overall average amplitude readout display (in dB)
*) quick set of display region: set x display to full dataset, set y display to default, set y display to fit current data
*) sample length: 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536
*) sampling frequency: 8k, 11.025k, 22.01k, 44.1k, 48k
*) update display multiple times while aquiring sample length (1, 2, 4, 8, 12, 16, 20, 30, 40)
*) 4 different fft modes: normal, average, integrating, averaged integrating
*) fft linear or log vertical scaling
*) highly responsive to user interactions (drag/zoom)
*) all user settings are stored when closing app, to have same settings for next start
The 4 fft aquisition modes:
- normal: simply show currently calculated fft on screen
- average: only add a certain amount of the current fft to the displayed fft, to achieve a smoothing in time. The amount can be user controlled.
- integrating: the currently calculated fft is added to the displayed one, so that the values are steadily increasing. This mode provides a reset button.
- averaged integrating: this mode also sums up all incoming spectra, but the data are resized so that the values are not increasing. This mode provides a reset button.
The dominant frequency of the sound is also displayed.
More from developer
Free Version Features:
* Multi-Touch Zoom/Pan * Display up to 3 minutes of continuous recording * Save as Image * Load previously saved Images * Change Spectrogram Colors * Easy Auto-Level / Max-level
Paid Version Features:
* Set Sampling Frequency/Window Size/Window Type * Show dB/Amplitude * Spectrogram smoothing * Export data to Matlab
What is a Spectrogram?
Every signal is a combination of unique frequencies, and can be disassembled into its frequency components. ("Frequency Spectrum")
A Spectrogram is a technique that is used in Audio Analysis (Spectral Analysis) to see the real-time behaviors of signals. It plots the frequency components of the signal over time.
The bar on the left shows the frequency (in [Hz]) and the color is the intensity of that frequency.
For non-techies - AndroSpectro is the simplest spectrogram app available. Just press the "Play" button. Feel free to Zoom-in/Pan using multi-touch gestures. You can also easily set the Maximum level or press 'auto' for auto-leveling.
For techies - AndroSpectro gives you control over every parameter you can think of. Display up to 3 minutes of continuous recording history and save as an image for later viewing.
For mega-geeks - Export the raw Spectrogram data to Matlab for further analysis. Your phone becomes your handheld input device for advanced audio analysis. (We wish we had it as a student)
Goto http://androspectro.com/matlab for more info
Please give us feedback so we can improve the app!
The AndroSpectro team