osx tagged posts

Java SysEx programming

Category: MusicTech Comments: One comment

I’m taking my first steps into the world of JavaSound programming. The first thing I learned is that the Snow Leopard default javax.sound.midi.spi implementation is buggy when it comes to SysEx message transmission. For the time being I’m sticking with the MMJ library instead.

As an example, I’ve been trying to send a “SID Skip Patch” command to my SID station. The SysEx message for this command is F0 00 20 3C 01 00 03 F7.

The following code shows how to construct this message in Java (example based on SendSysex.java at jsresources.org):

String s = "F000203C010003F7";
int n = s.length() / 2;
byte[] msg = new byte[n];
for (int i = 0; i < n; i++) {
    msg[i] = (byte) Integer.parseInt(
    s.substring(i * 2, i * 2 + 2), 16);

The next step is to send the resulting byte array to a MIDI out...

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Wireshark on Snow Leopard

Category: Tech Comments: 2 comments

Finally fixed a bug that’s been annoying me for months. I managed to get Wireshark up and running on OSX Snow Leopard – without any crappy workarounds such as running it inside a virtual XP machine. The video below by dangribbin explains it all.

Summarizing the steps:

  1. Download and mount Wireshark for 10.5 Leopard Intel
  2. Drag Wireshark to Applications
  3. Open a terminal and type:
    defaults write com.apple.finder AppleShowAllFiles YES
    killall Finder
    com.apple.Finder (i.e. Finder with a capital F) did not work for me!
    – For more info on defaults type man defaults.
  4. Create /usr/local/bin/ if you don’t already have one.
  5. Drag the Command Line utilities into /usr/local/bin/.
  6. Drag ChmodBPF folder to Startup Items.
  7. In the terminal type:
    sudo chown -R root:wheel ChmodBPF
  8. Launch Wireshark
  9. Add /usr/s...
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