Spectrograms (as opposed to a real-time spectral slice)?
Any chance that SignalScope for the iPhone will be getting a spectrogram display in addition to the FFT analyzer that seems to be on there? Real-time would be nice, but more useful (to me) would be the ability to record a short segment and then draw a zoomable spectrogram?
This would be very useful for me, as it provides a somewhat more conventional way of looking at speech acoustics.
This would be very useful for me, as it provides a somewhat more conventional way of looking at speech acoustics.
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Ben
My background is in music, so although I know a lot about frequencies and stuff I'm certainly not an expert on this type of program. Perhaps a lot of iPhone users will be like me. I'm not sure exactly what a spectogram is, but I suspect that is something I am looking for too. Just so you know what I would be trying to use your program for:
1. Illustrating vowel shapes to singers (shape of strength of overtones)
2. A visual way to encourage singers and instrumentalists to produce a stronger 'tone', by which we usually talk about producing stronger overtones (upper harmonics).
I've fiddled about with the settings, I wonder could you recommend any particular settings for the uses I mention there. For instance I think linear works better than log for the frequency side of things.
And once again thanks for a brilliant app!
It sounds like a spectrogram would be very valuable to you. You can take a look at our Mac software for sample spectrogram displays.
For now, with SignalScope on iPhone, your best bet may be to work with a linear frequency scale and a dB magnitude scale. Increasing the number of spectral lines will improve the frequency resolution, but it will slow down the responsiveness of the spectrum display. A little trial and error can help you find a setting that you like best.
The harmonic cursors may also be helpful.
Enjoy!
Ben
What range of window lengths would you be looking for?