Recommended by "Sound and Vision" magazine.
Features 1/1, 1/3 & 1/6 octave RTA modes, Leq (wideband, Octave, variable duration), RT60 (wideband, Octave), Spectrogram, Peak frequency, Fast, Medium & Slow filters, Flat & A/C Weighting and film industry X Curve, Averaging, SPL Chart Recorder, Noise Criteria, White/Pink Noise, Sine, Square, Triangle, Sweep, Ramp and Impulse signals & loudspeaker polarity checker, L/R select. RTA Store & Load, Hann windows, "Keep Screen On", pinch to zoom, scroll to center.
Exclusive ISO 1/3 Octave Calibration - correct for your phone's microphone response. Octave calibration discs are moved up or down to obtain a flat response, and match the overall SPL to that of an external meter. Save/Restore of Cal files (Dayton Audio iMM-6 also supported).
Use: home theater, audio engineer, car audio, etc
AudioTool FFTs sets of samples recorded at the microphone. Aliasing reduced by Hann windowing. SPL calculated in realtime. Spectra may be saved as files on the SD card, then loaded and displayed with the live spectrum. The "Store" button stores the current live spectrum - "Load" shows a list of stored spectra to select.
To hide the buttons, tap the screen. To restore them, tap again. To zoom the scale, pinch the screen. To move the scale, drag it up or down (left or right).
The deciBel meter uses IIR filters and exponential averaging to calculate Flat, A and C weighted response at speeds of Fast, Medium and Slow speeds.
A pair of cursors can be shown on the RTA and Chart Recorder displays: each can be moved to any position, and will display the SPL & time/frequency values there. Initially, both cursors are positioned mid-screen - simply drag them to a new position with the fingertip. The cursors can be turned on and off in the Menu.
The loudspeaker polarity checker can be used to check whether a loudspeaker is wired in phase: connect the AudioTool output to the speaker under test, select "Polarity" from the signal generator screen, then return to the RTA screen. If the speaker is out of phase (polarity reversed) AudioTool will show "Pol ---", otherwise "Pol +++" if the speaker is in phase.
The Noise Criteria (available from the Menu) function shows a set of NC contours overlaid on the 1/1 Octave RTA display and the calculated real time current NC value is also shown.
The Chart Recorder shows a moving trace of the SPL measurements over the last few minutes.
RT60 measurements can be made by starting the RT60 component using the "RT60" button, and then using a loud clap (or similar) to trigger the measurement. RT60 can also be used with Pink Noise from the AudioTool generator. RT60 times measure how much reverberation or echo there is in a room or auditorium.
The Signal Generator generates White and Pink Noise, Sine, Square, Triangle and Ramp waves, Sine Wave Sweeps and Impulses. The generator uses multiple cycled buffers, refreshed randomly so ensuring truly random White/Pink noise. Pink Noise algorithm uses Kemmet's method to adjust White into Pink.
The frequency accuracy of the generated periodic signals is typically around 1%. Sine wave fidelity is good throughout most of the audio range. Other signals' leading and trailing edges show ringing and decreasing frequency response artifacts in the upper ranges, depending on the Android used.
Please consult the online manual for complete descriptions of the AudioTool features:
Please join the friendly AudioTool Discussion Group to request features, find Calibration files, or report problems. Feedback is always welcome:
Disclaimer: AudioTool's performance depends on your Android hardware, and is not guaranteed to meet any audio measurement or safety standards.
(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.)
Touch and move your finger to set bits on and off. Control your music flow. Enjoy it.
Optimized for Intel x86 mobile devices.
Ispired by Tonematrix web application (tonematrix.audiotool.com) and The Matrix franchise.
Analyse captured audio from microphone in three separate panels:
- Osciloscope (time domain),
- Spectrum (instantaneous frequency domain),
- Spectrogram (accumulative frequency domain).
You can display all panels at once (default screen). If you want to see each panel at full-screen, you can simply click on panel and it will be shown full-screen with additional settings that can be changed by pressing buttons. Display can also be paused to take screenshots.
In Spectrum panel values of one or five leading frequencies can also be displayed. Linear or Logarithmic magnitude scale can be chosen. For better peak frequency estimation, special algorithm is applied.
Please share your experience with us. We will do our best to make this application better.
The internet permissions are used for ads only.
The next evolution of Draw Music MonadPad, based on Ethereal Dialpad is here for your modern Android phones and tablets!
Explore music by changing scales and keys while the music plays, and hearing the results in real time.
Remove your new headphone from your ears and plug them to your Android device. Select the appropriate model or create a new profile for your headphone. Adjust the volume on your Android device to mid-level (normal listening volume), then start.
● Playback volume should be at your normal listening volume. For Moshi Audio earphones with impedance up to 20 ohms, this corresponds to 40-60% of volume on the Android device. Audio playback at excessive volumes WILL damage your headphones.
● Allow several hours of 'rest' in between burn-in cycles. The recommended duration for each burn-in cycle is 4-8 hours.
● Listen to your headphones in between burn-in cycles to check the progress. Some headphones may require additional burn-in time before reaching their desired sound quality.
Also available for iOS.
• multitouch arpeggiator;
• export to WAV;
• eight predefined timbres;
• changeable number of octaves (from 2 to 8);
• it is possible to draw the spectrum and play it at the same time.
Dark colors - low frequencies (bass). Bright colors - high frequencies.
Get a lot of fun using SpectrumGen together with SunVox, PixiTracker and PixelWave synths!
Known solutions for some problems:
** Free version is ad supported. An ad free version is also available if you prefer **
Requests, bugs, etc you can contact me via the support menu. Currently here is a list of what's available:
Amplifier power required
Ceiling speaker coverage
dB to Volts
Delay and frequency
Inverse square law
SPL (sound pressure level)
Subwoofer cone area
Speaker impedance calculator
Frequency to note
Loop length to BPM
Questions or problems? Please Email me!
If you need a combined Signal Generator and Spectrum Analyzer with dB SPL, Leq, Spectrogram, and RT60, check out the Android "AudioTool" app.
- Easy to use audio recorder
- Custom sample rate and bit rate settings
- Audio recording preview with peak indicator
- Editor with basic edit functions
- Open mp3 or wav files
- Save as mp3 or wav files
- Android 4.1 and above
- Free space on your (external) drive, especially when working only with uncompressed wav files
With this app you can check the "polarity" of a speaker, whether it first moves forwards or backwards (often mistakenly named "phase", which is also time and frequency related).
A loudspeaker should have the same polarity as it's "friend on the other side" when measured at the same position/distance. This also counts for multiple speakers which should be doing the same (a cluster of multiple subwoofers for instance).
- Red is NOT bad!! A lot of filter-designs that drive loudspeakers have out of polarity components (so for instance the high frequency speaker CAN be opposite polarity to the low frequency speaker).
- Try to measure as close to the speaker as possible (and away from bass-ports).
- dBFS means "Decibels relative to full scale". So 0dBFS is the maximum soundpressure your device is capable of handling without distorting (clipping).
- Using a different pulse signal CAN give opposite readings, due to loudspeaker filter designs. Use the same pulse when comparing!
Polarity Checker can be useful for testing almost all sound sources. Like large scale concert PA systems, home theater systems, studio monitors, car audio en even headphones..
For playing the pulse signal you have 3 options:
- Use a wire to connect your phone/tablet to the Sound System.
- Use 2 phones/tablets (one wired for pulse generation and one without wires for measuring).
- Copy the pulse files (which can be found in sd-card/PolarityChecker) to a playback medium (cd/iPod) that is able to repeat single tracks.
- When the polarity-reverse button "Ø" is pressed (red), the pulse generator plays a negative pulse. So the measurement should give opposite readings! (equal to playing an INVERTED_pulseXXXX.mp3 file)
- Avoid CLIPPING the microphone, this could corrupt the measurement.
- Adjust the threshold, so the checker doesn't get triggered by background noise.
- Try to measure one speaker at a time. If possible mute all other sound sources.
When measuring "passive filtered" speaker cabinets (for instance when you've got one amplifier driving your low and high speaker at the same time), it can be useful to select a frequency dependent pulse to isolate the speaker you want to measure.
If you like this app, please comment and rate. If you've got any questions, bugs or feature requests, please visit the facebook page: http://www.facebook.com/PolarityChecker
- RECORD_AUDIO: To use the mic input of the device
- STORAGE: Needed to copy the pulse files to the sdcard
- FULL INTERNET ACCESS: Needed for Ads (not used when donation key is purchased)
- VIEW NETWORK STATE: Needed for Ads (not used when donation key is purchased)
Search tags: popper, pop, plopper, sine, inwards, outwards, cancellation, stereo, positive, negative, reverse
ProSpec - Lite is a basic Real time spectrum analysis tool. It generates a spectrogram on the fly and supports 8kHz and 44.1kHz sampling frequencies.
You can record, playback, save and share the spectrogram for a given time frame. It provides a maximum frequency tracking facility with measurements both in dBFS, (SPL in paid version only).
Other features include:
- Time scale in seconds
- Update speed
- Dynamic range control
- Complete color customisation
- RGB option
- For audio engineers, an invert feature for live events in dark rooms
- Audio tool, allowing you to share, save and listen to the complete audio that has been recorded
- Saving, sharing and exporting the configuration (i.e. analysis settings: window size, dynamic range, FFT length and analysis window)
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
- FFT size fixed to 1024 for 8kHz and 512 for 44.1kHz
- Uses a moving window to calculate the FFT Magnitude spectrum
- Uses Hamming analysis window
- Frame Length fixed to 32ms
- 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)
- JET RGB color scheme (and many many many others)
- Free version has watermarked images when saving or sharing
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 for free. e.g. time scale (x-axis labels), saving settings and sharing the audio and images, and maximum frequency tracking. These are all features I wanted a single tool to have, unfortunately all others seemed to fall short, hence ProSpec has been developed to accommodate my needs, and hopefully yours.
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, I have limited resources and don't have access to the thousands of phones and tablets out there. If you find any bugs or issues please take the time to e-mail me (email@example.com) and include what you were doing at the time the bug occurred.
Like image was synthesised from accumulating sine waves into an audio file.
v1.9 targets minsdk 9 and xlargescreens
v1.8 minor changes
v1.7 output includes Android Build.MODEL string
v1.6 allows to send results as an email
v1.4 confirms play/record capability by send/receive of samples to the audio hardware
Questions: email firstname.lastname@example.org
The best Drum Machine for Android™
■ Studio quality sound
■ 11 popular drum kits
■ 8 drum pads
■ 6 sound effects
■ pad pressure
■ pad aftertouch
■ integrated sampler
■ integrated sequencer
■ integrated mixer
■ integrated recorder
■ sensor pitch bend
■ sensor volume change
■ drum machine editor
■ samples recording
■ samples load & save
■ tracks load & save
■ machines load & save
■ MIDI load & save
■ MIDI over WiFi
■ MIDI velocity
■ MIDI aftertouch
■ MIDI volume control
■ MIDI pitch bend
■ 12 sounds polyphony
■ 17 machine skins
■ 21 pad styles
■ 18 text styles
■ 7 pad fonts
■ 8 window themes
■ window animations
■ custom pad text
■ tablet support
■ multi window support
■ pen window support
■ fullscreen on 4.4+
Record & Share geo-tagged audio snippets with your friends via Shoudio.com, Twitter, Facebook and Foursquare.
Browse through random Shoudio's from other people all over the world.
What are you hearing?
* OPEN BETA: This means that everything of the Shoudio for Android app. will just work as expected, but once in a time you might face an inevitable sign of betaness. Expect paced iterations as we work out glitches along the way. With your help we can built Shoudio towards a great audio tool.