Free spectrum ananlyzer software for windows

We have some awesome pictures in our free screensaver featuring the Kia Spectra. This is a free screensaver that displays high quality images of Kia Spectra.

SpectraScan is a little helper program for those unlucky persons, who dont get their spectrums in an appropriate computer readable format, but on dead tree.
This SpectraScan will allow you to convert a variety of spectrum types into a comma separated value format, a format which is suitable to be loaded into Excel or a statistic program.
Another feature is the ability to scan the axes of a spectrum. In the image below two points for the x-axis have been marked with the x-scale button.
Now it is possible to get the value of each point on the x-axis. In the image below the absolute minimum of the curve lies at 3385 units.
To export a curve everything what is not curve has to be removed. This can either be done by manual clipping, or manual erasing non-curve points.
Or an image filter can be applied. The image below shows a clean curve, which is ready to be exported.
More documentation can be found in the help menu of the program. The program development is in beta stage.
There still might appear small changes in the userinterface and maybe a couple of minor features will be added, however, the main line of development will be the development of filter plugins.

RightMark Audio Analyzer was designed to be an independent audio measurements open-source project. The test suite performs various tests of electroacoustical performance of sound cards and other real-time audio devices.
Testing is accomplished by playing the test signals and recording them after they pass through the testing chain.
The most interesting feature is advanced spectrum analyzer of any WAV-file for custom users tests.
Spectrum analyzer options are:
- FFT size: variable size of FFT block (in samples) from 128 to 262144
- Resolution: calculation width of each spectrum frequency bin
- Zero padding of audio data before spectrum analysis. Interpolates spectrum and displays it more precisely
- FFT overlap: Overlapping of FFT blocks in time domain. Higher overlapping leads to slightly better spectrum averaging
- FFT window: FFT weighting window selection. Weighting windows affect the level of spectral side-lobes and frequency spreading of spectral main lobes
- Kaiser window beta: Adjusts the shape of Kaiser window. Higher betas lead to better suppression of side lobes (useful when spectrum has high peaks), lower betas lead to slighlty better frequency resolution.
Main features:
- friendly users interface (all tests and options in single list, new look of HTML report);
- added new sample rates (88.2, 176.4 kHz);
- added new important parameter in HTML report: Harmonic distortions + noise, dB (A);
- added new MONO mode;
- added polarity test (HTML report);
- added new spectrum plot modes (linear/log/mel);
- added support of local languages on spectrum label;
- fixed some critical errors.

Overtone Analyzer Free Edition 1.0.6 works as a spectrum analyzer and spectrogram software, which includes same main features as the other editions of Overtone Analyzer. With this program you can visualize sound coming through your sound card; record and visualize your voice or your instrument with a microphone connected to your computer. Most sound cards also allow you to record the sound that is currently being played, so you can also use Overtone Analyzer Free Edition to visualize your existing recordings or live streams from the web.

Like many other freeware spectrum analyzer programs, Overtone Analyzer Free Edition records incoming audio data in an infinite loop and always remembers the last 10 seconds of your recording. So you can always leave it running to continually visualize the sound that you are currently hearing. What sets this program apart is the ability to stop the recording and to replay it, to zoom into the existing data, to scroll back, and to adjust all visualization parameters and update the existing data in real time without having to redo your recording.
In addition, you can use the Overtone Slider Overlay to take precise pitch measurements and to learn about the overtone sequence of your sounds. The piano keyboard shows all pitches in a musical context, while the frequency scale gives a more scientific view. You can display your recording as a spectrogram, a spectrum, a waveform, or an oscilloscope. Of course, the user interface is fully configurable, and all views can be switched on or off.

These features make Overtone Analyzer Free Edition the perfect tool to learn about or teach the basics of the physics of sound, to experiment with the pitch and timbre of your voice, to learn the overtone scale, to get started with overtone singing, or to tune your instrument. There is a lot of free spectrum analyzer software to be found on the web. If there is only one free spectrum analyzer software that you will use today, make it Overtone Analyzer Free Edition.

Major Features:

1. Record sounds and render high quality spectrogram and spectrum displays in real time
   
2. Interactive real-time adjustments of display parameters
   
3. Overtone Slider Overlay: 1
4. Integrated colormap editor
5. Longest displayed time range: 10 Seconds Continuous Loop
6. Best supported frequency resolution: 10.8Hz at 22kHz
7. Best supported sampling rate: 22kHz
8. Best supported bit depth: 16bit
9. Audio Quality: Mp3 Quality