Problem to plot raw pitch from a PC recorded audio file

Hi, for the last two days I have been playing with the features in Speech Analyzer to become familiar with them. In particular, I’m trying to plot the raw pitch for some PC-recorded audio files, but I’m getting the following message every time I select the command to plot raw pitch:

“No voicing found in the range of human speech.”

I have encountered no problems to plot spectrogram of these PC-recorded .wav files, but the formants are not being plotted despite I have selected the option in the right-click Parameters… window.

I have been able to plot Intensity as well, but not the rest of the wide range of graph options available in Speech Analyzer.

I could be missing something but after reviewing what I have done and still being stuck at it, I decided to ask for help.

Before starting this new thread, I have conducted the following troubleshooting:

  1. Downloaded and checked the Student Manual looking for a troubleshooting guide. (I found no reference to this problem)
  2. Typed “No voicing found in the range of human speech.” in Google. (I found no reference to this problem).
  3. Searched among the existing inquires in this online community. (I found no reference to this problem).
  4. Tested the raw pitch plot function with three different PC-recorded audio files. (UNSUCCESSFUL).
  5. Tested the raw pitch plot function with two different iPhone-recorded audio files. (UNSUCCESSFUL).
  6. Tested the raw pitch plot function using three of the example audio files that come with the installation of Speech Analyzer. (SUCCESSFUL).

In summary, the option to plot raw pitch and formant (and few other graphs) does not work on any .wav file other than the examples .wav files that are part of Speech Analyzer installation.

Could you think of any reason why I can’t plot raw pitch and formants in the files I’m recording and opening with Speech Analyzer?

Thank you for any guidance you could provide.


I’m interested in this question, as I’ve never had problems with SA with “normal” wave files. Not all files are created equal and SA expects a no-frills mono WAV file.
From the Help:

“Speech Analyzer only supports mono recordings and single channel (Type 0) MIDI files.”

I have a feeling that the files you are trying to open are not “standard” mono WAV files and are actually something stereo or compressed like an MP3 or AAC.

Could you share some of the wav files though Google or Dropbox?

What apps are you using to do the recordings? What export settings do you use? If not, could you give a screenshot of the descriptive properties of one of the wave files that won’t work.

Speech Analyzer:

Full Screen with Spectrograph:


Sorry about the trouble. Here are a few ideas…

If you start SA and select your WAV file, you should see that waveform on the screen.
By default the 2 cursors at the far left of the recording now need to be positioned.
That is, move the Green and Red cursors to select a specific region of interest.
Then press one of the Triangle play buttons at the top of the screen.
You should now be able to hear the audio of the recording.

In the left-hand “Phonetic” column, you should see several options to choose from.
If you select “Waveform, Auto Pitch” you will see a new screen under “Waveform”.
The Pitch contour of the audio recording should now be shown in that window.
A right-mouse click in the Auto Pitch graph will show the other 3 Pitch options:
Raw Pitch, Custom Pitch, and Smoothed Pitch.

If you select Spectrogram, you can view the waveform, but no Formant will be shown.
To show Formants, do a right-mouse click in the Spectrogram and select Parameters.
Then select the item “Formant Tracks” and click the item “Apply” then select “Close”.

We have just released a new version of SA: “SpeechAnalyzer.”
I suggest you download it at: Speech Analyzer - SIL Language Technology - SIL Language Technology



We’ve recently been doing updates in Speech Analyzer and it works well now.
SA supports recordings at 96KHz, 44KHz, and 22KHz either in Stereo or Mono.
However for linguistic work 22KHz Mono works well and results in a small file size.
There is little use for Stereo since our focus is getting clean audio with no crosstalk.

The comment of "Speech Analyzer only supports mono recordings and single channel
(Type 0) MIDI files.” is true for music analysis work. And SA only provides MP3 and WMA
support for read-only access, they would need to be converted before SA could use them.