I have a nice audio interface with +48V phantom power and phase-reverse capabilities. The only problem is that I must find a PC with an IEEE 1394 interface to set up the device.
A Microphone not for SSB
A microphone with an electret microphone module. You can find the circuit diagram at http://ameblo.jp/shin-aiai/entry-12120744691.html.
In the article, the author suggests to replace the Zener diode with a resistor to reduce the noise. When one starts to replace the parts, he may also be tempted to replace the whole circuit, and the microphone module, and finally there will be no original parts at all.
Hymne à l’amour
Céline Dion pays tribute to Paris victims at American Music Awards 2015.
EZAudio
https://github.com/syedhali/EZAudio
EZAudio is an iOS and OSX audio visualization framework built upon Core Audio. I suppose this framework will be very useful to me.
OpenGL and GLUT with Xcode (3)
If you are using OpenGL and GLUT, making it a 3-D is relatively easy.
Actually, these are motion pictures, and the plane and the cube are rotating.
OpenGL and GLUT with Xcode (2)
Read a wave file that contains two sinusoids, 7kHz and 11.025kHz (=44.1kHz/4), and display the waveform and its spectrum.
Here I used the libraries, OpenGL, GLUT and FFTW3, all popular for UNIX environment. With OS X, perhaps I should do otherwise.
You can find the source code at this point of the history at: https://github.com/jh1ood/libsndfileXcode/blob/be835c328d8c032a242094d809599208276fdee8/libsndfileXcode/main.c.
Git and Xcode (2)
When you do Source Control -> Commit, you can check the checkbox, Push to remote, at the bottom left corner to also push to your remote repository.
https://github.com/jh1ood/libsndfileXcode/commits/master
You can always compare the different file versions with the menu: View -> Version Editor -> Show Comparison View. By clicking the clock-shaped icon in the middle, you will have a GUI similar to Time Machine.
Libsndfile with Xcode (2)
Using libsndfile on OS X may not be cool, but it works.
The source program is here: https://github.com/jh1ood/libsndfileXcode.
In the gnuplot figure, two channels are interleaved. Just see the envelope to find two sinusoids.
Git and Xcode
Suppose you found a nice cool Xcode project in a remote repository, say, https://github.com/jh1ood/glutXcode.
You can check out the project from the Welcome screen of Xcode, or from the menu Souce Control -> Check Out….
Copy the repository URL, for example, https://github.com/jh1ood/glutXcode.git, and paste it into the repository location field.
After several clicks, you will have the project downloaded into your Xcode. Please also see my previous article, OpenGL and GLUT with Xcode for the description of the project itself.
Bilingual Blog?
I don’t know if it is worth the effort, but if, in future, I have a multilingual blog, it could be fun.
- My blog in English, https://spinorlab.wordpress.com/
- My blog in Japanese, https://spinorlab2.wordpress.com/
- My blog in French, https://spinorlab3.wordpress.com/ (coming soon)
- My blog in Russian, https://spinorlab4.wordpress.com/ (coming soon)