A spectrogram is a comprehensive view of an audio piece that is visually able to depict time, frequency, and amplitude all in one graph. It is very helpful as it can reveal the electrical or sporadic noise in audio and allows you to visually isolate them. Spectrograms are especially useful in post-production due to their profound level of detail.
Usually, we are habituated to seeing an audio waveform which displays the changes in the amplitude of sound over time. A spectrogram on the other hand, displays the changes in frequencies in a signal over a period. Additionally, the amplitude is depicted on a third dimension using different colors or variable brightness.
In this article we will be exploring 5 Free Websites that you can use to generate and analyze Audio Spectrograms online. Some of the websites allow you to play an audio file and generate the spectrogram in real time while others only generate a static image of the spectrogram.
1. WebFFT
This is a very simple and straightforward website that allows you to generate and analyze Audio Spectrograms easily and quickly. Just navigate to the link that we have given below, click on ‘Open’ and upload the audio file from your system in mp3, wav, wma, midi or any other popular file formats. You can also click on ‘Record’ and record any sound to generate its audio spectrogram. As soon as the audio file (or recorded sound) is uploaded, you will be able to view its spectrogram on the screen.
Clicking on any part of the spectrogram reveals the frequency and time at that location. You can mark any rectangular area of the audio spectrogram by clicking and dragging your mouse and then listen to only the frequencies of that part of the audio as well as further zoom in or download them in WAV format. Additionally, you can click on ‘Open Controls’ at the top right of the page to change the Frequency (Hz) or decibel value (db) if required.
Click here to navigate to this website.
2. Academo Spectrum Analyzer
Let’s move on to the next Spectrogram Analyzer from Academo. This too is a very simple and easy-to-use website that generates the spectrogram in real time as the audio is being played unlike the previous tool that only provides the image of the spectrogram.
Navigate to the link that we have provided below, click on the ‘Choose File’ button and upload the audio file from your computer. Click on the ‘Play’ button and you will be able to view the spectrogram on the screen in real time. You can switch between a linear or logarithmic frequency scale by checking or unchecking the Logarithmic frequency scale checkbox.
Click here to navigate to Academo Spectrum Analyzer.
3. DCode Spectral Analysis
This website works much the same as the previous one that we have discussed above. Just navigate to the website using the link that we have provided below, click on ‘Choose file’ and upload the audio file from your computer.
Once the audio file is uploaded, click on the ‘Play’ button and you will be able to see the Audio Spectrogram on the screen in real time. You can switch between a linear or logarithmic frequency scale by checking or unchecking the Logarithmic scale checkbox.
Click here to visit DCode Spectral Analysis.
4. AudioMotion
AudioMotion is yet another website that you can use to generate and analyze the Spectrogram of any audio file or recorded sound through your microphone. The UI of AudioMotion is very simple and impressive and it allows you to view the Spectrogram of any audio file in real time as it is being played. In addition to this there are a range of Settings and Options that you can configure to tailor the spectrogram as per your needs and requirements.
Simply navigate to the website using the link that we have provided below and use the buttons at the center of the interface to upload a file from your computer or from a web link. The audio will begin playing as soon as the file is uploaded and you will be able to visualize the spectrogram on the screen. You can click on the ‘Settings’ button to configure a whole range of settings related to Frequency range, Mode, Gradient, Sensitivity and more. You can also click on the ‘Config’ button to configure general settings, sensitivity presets etc.
You can switch between Fullscreen and PIP mode using the corresponding buttons. To view the real time spectrogram of any sound through your microphone, use the ‘Source’ toggle button, switch to ‘MIC’ and start recording your sound or any other piece of music.
Overall, this is the best Spectrogram generator and analyzer that I have come across in this article. Click here to navigate to AudioMotion.
5. Online Spectrogram
This is one of the simplest online audio spectrogram generators that I have come across. It enables you to upload any audio files like mp3, wav and more to generate a color-coded static spectrogram unlike a few other websites that we have explored above, which gives you a real time spectrogram of any audio file. Apart from this, there are no other options or features to play around in this tool.
To navigate to Online Spectrogram, click here.
Closing Comments:
All the above audio spectrogram generators are free, very simple and easy to use. You can spend some time with each tool and see which one of them best suits your requirements. In my opinion, AudioMotion is the best spectrogram generator of all the tools that we have explored for its impressive UI and the control that it awards you through its configuration options and settings. Let us know what you feel about them.
