Monday, July 27, 2009

orchive



I've made lots of progress on the new Orchive site, and wanted to
share them with you. Check out a demo site I've made at:

http://orchive.sness.net/recordings/show/2



There's lots going on there, but a brief tour is:

In the middle of the screen is the new OrcaAnnotator flash player I've
been working on. It shows you a spectrogram or waveform display of
the recording. It starts off fully zoomed out, showing a full 45
minutes of audio. To zoom in, you can either use your mouse wheel or
the "Zoom In" and "Zoom out" buttons, which look like magnifying
glasses.

Zooming in happens around the current playback position, which you
change by clicking either on the progress bar at the bottom of the
screen (the blue waveform), or by clicking on the annotator view on
the top hand side of the screen.

Let's click near to one of the annotations that say "Orca". Then,
zoom in, and keep zooming in until you can see the individual whale
vocalizations in the spectrogram.

Then, to play the audio, press the "Play" button.



Other neat features are:

  • You can edit the text of an annotation by clicking on it

  • You can drag the ends of an annotation back and forth

  • When you edit an annotation, the application will automatically
    save it back to the database (disk icon turns orange when it's saving)

  • You can also click on the disk icon to save the current state

  • The table at the bottom of the screen dynamically updates itself
    with the current annotations in the database

  • You can view either the waveform or the spectrogram view by clicking on it

  • To create an annotation, hold down the "control" key and then
    click and drag. Then just start typing to create an annotation, or
    click on the annotation icon in the control bar.

  • The question mark will soon show a little help screen

  • The coloured bars show what predictions from Marsyas will look
    like. Please note, these are just currently just randomly created to
    show what they will look like, and have no relation to the real data.



It's still very rough with lots of bugs and problems, but it's getting
there. I would appreciate hearing about any problems you have, and
would love any suggestions or comments.

Email me at sness _at_ sness.net!