Axtell's Notes: June 22

Lots of little updates to BigGUI today. Next is to add the constant Q to BigGUI. It will be at least a few days to get a constant Q working on its own before BigGUI can implement it.

First of all, changing the buffer size no longer calls PeakData and NoteFinder, only SPLIT does that. Also, since windows are working now, BigGUI uses a Hanning window unless you tell it otherwise.

Next, when FFTGUI is called through BigGUI, the FFT and sine curve of that specified sample are shown as soon as it opens. For something that took several days to get working, the final code was very simple. There is a boolean that is true if main is passed data. If the boolean is true, after the FFT and sine buttons are initialized, they call doClick(). I also adding Tayloe's code from yesterday that goes to the specific mini file as opposed to using the whole file.

I also added a few popup panes that catch and explain errors. There's also one when SPLIT is complete.

An old problem that I finally got around to today is closing/reopening windows. Ideally, we should be able to close the peak and note windows and reopen them by clicking on Show Peaks or Show Notes. All I had to do is add a setVisible(true) to their listeners. I also did the same in FFTGUI. Closing either of the control windows ends the program.

The peak graph has two options for the x-axis units now (samples or seconds.) Not every second is marked except on short files (less than 15 seconds.)

Lastly, there is now a button next to the filename text field that plays the filename. Eventually, pressing the button again will stop the sound, but as of right now that is not working.

Screenshots: proof that I actually get work done. This is the peaks and notes of Maple Leaf Rag (using the old NoteFinder, I only just got the new one) with a Hanning window zoomed in to see the first ~1380 Hz.

Maple Leaf Rag With Hanning Window

Tomorrow, I'll be stopping the sound from playing, and looking at constant Q transforms.