Spectral Audio
Free App
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About Spectral Audio
Spectral Audio is an audio frequency analyzer that uses your phone/tablet mic input.
Data sampled at 44.1 kHz is used to produce length 2048 FFTs and display
an energy spectral density from 0-22 kHz.
Data sampled at 44.1 kHz is used to produce length 2048 FFTs and display
an energy spectral density from 0-22 kHz.
Technical Specs
- Frequency Range 0-22 kHz
- 2048 pt FFT
- Frequency resolution 21.5 Hz
- DC component removed
- Hamming Window
- Sampling Rate 44100 samples/sec
- Sampling Period 46 ms
- Smoothing Function: 5 pt triangular moving average
Features
- Linear and Log amplitude
- Smoothing Function
- Peak Identifier
- Hold function
- Local Zoom function (X 8)
- Selectable Gain - 0, 5, 10, 15 dB
All Application Badges
Free
downl.
downl.
Android
4.0+
4.0+
Bug
buster
buster
Android app
App History & Updates
What's Changed
Attempt to fix issue with menu button crash - Note that this app has no menu function but apparently the menu button would cause a crash on some devices. Couldn't duplicate on my test devices, but redid the code to ignore the button press.
Added Linear Amplitude display. Note that the scale is floating for Linear Amplitude meaning that it adjusts to the signal energy amplitude with each render.
Attempt to fix issue with menu button crash - Note that this app has no menu function but apparently the menu button would cause a crash on some devices. Couldn't duplicate on my test devices, but redid the code to ignore the button press.
Added Linear Amplitude display. Note that the scale is floating for Linear Amplitude meaning that it adjusts to the signal energy amplitude with each render.
More downloads Spectral Audio reached 50 000 - 100 000 downloads
More downloads Spectral Audio reached 10 000 - 50 000 downloads
More downloads Spectral Audio reached 5 000 - 10 000 downloads
What are users saying about Spectral Audio
Z
by Z####:
by Z####:
...because frequency scale is not log!!!
C
by C####:
by C####:
Very fast and accurate ...also need to work on between 0hz-250hz band resolution
Z
by Z####:
by Z####:
Nuff said!
C
by C####:
by C####:
Did what I wanted!
C
by C####:
by C####:
Loved it. Best one in market.
C
by C####:
by C####:
Simple & clear
C
by C####:
by C####:
Linear freq scale is useless. Too few FFT bins; poor smoothing. No peak hold/reses function ("Hold" only pauses entire thing). Freq axis labels out of control: too big, overlapping each other, unreadable.
M
by M####:
by M####:
Helps a bit but frequencies shown are slightly below real tone. The defaulf F note 440hz is measured as 344hz and 880 as 689. Settings could also be saved...
C
by C####:
by C####:
I work with audio for my church and we're moving to a new place with different acoustics. This will come in very handy to optimize the sound quality there!
C
by C####:
by C####:
Nice app. But the peak frequency reading is not accurate enough. If you correct it, I will give 5 stars.
Q
by Q####:
by Q####:
I'm studying how to build acoustic guitars and have been using this to tune the right frequencies for my tops and back of my instruments. The only thing I really think it's missing is a spectrum recorder ... Having to press hold on the exactly time sometimes is hard. Besides that all I can do is thank the developers for this awesome app.
Q
by Q####:
by Q####:
I shall be using this to check that my own DSP FFT works.
Q
by Q####:
by Q####:
Wasn't to crazy about the over lapping of the frequency at bottom of display, but once the hold was selected it directed my eyes to the peak freq. Pretty user friendly for a small screen.
X
by X####:
by X####:
Just a toy for some, but this would be really useful for some kinds of work, for example ringing out a sound system.
G
by G####:
by G####:
Don't seem to do much, uninstaling
Q
by Q####:
by Q####:
It's an excellent tool, with good quality, but it stuck my phone everytime that I turn of the screen without exit the app. Please solve it, it happened to a friend too.
Q
by Q####:
by Q####:
Preforms exactly as expected and is easy to use.
Q
by Q####:
by Q####:
Simple design no confusion while using and it does what it says and all this is free.
L
by L####:
by L####:
Only allows you to adjust from 250hz.. Uninstalling this useless app.
Q
by Q####:
by Q####:
Crashes every time after max. 20sec
Q
by Q####:
by Q####:
Wonderful APP only for true scientific needs... no intrusive permissions... 10 stars!!!
G
by G####:
by G####:
Used it to locate a very annoying high pitch generated by an old machine in the office.
L
by L####:
by L####:
Good
F
by F####:
by F####:
I like the peak
X
by X####:
by X####:
Really good in using.
K
by K####:
by K####:
Easy to use. Clean layout. Like the peak function. Being able to see the actual value of the peak frequency is very handy.
K
by K####:
by K####:
good
M
by M####:
by M####:
Menu key crashes app
by C####:
I want to use this to tune aPA and it doesn't seem to cover all the spectrum.