Dave Phillips wrote: > I'm writing an article about Java sound applications, and I've run into > a problem. > > HighC, FScape, and jein all demonstrate the problem: They appear to be > working as they should, but there's no audio output. According to > HighC's author, he uses only the recommended class for audio output. I > quote from our correspondence : > > "All I do is call javax.sound.sampled.AudioSystem.getLine() with the > default settings. It should work as is, that's what the Java spec says. > Perhaps the Java configuration files allow setting the default audio > device on Linux?" > > So, what is the default audio device for Java 1.6 on Linux ? Is it > configurable ? If so, where do I find it and how do I set it ? (Btw, I > have the Sun SDK).
The implementation has changed some times. IIRC it was /dev/dsp long time ago, but since then it switched to native ALSA devices. Sometime after v1.5.0, it is possible to use "hw:X" and "plughw:X" (dmix) devices, but by default I think it uses the "default" ALSA device now, whatever is configured with that name. > I also have HighC installed under Wine, along with the JRE 1.6 for > Windows. HighC works as expected there. I could not test jein under > Wine, it requires javac, which is not included in the JRE. The compiler is included in the JDK (JSDK), which can be downloaded gratis from Sun. I don't know those programs. Are there sources available? BTW, maybe you like to know that Gervill, the java free synthesizer has released the magic 1.0 number. GPLv2 licensed: https://gervill.dev.java.net/ This project is proposed as the Audio Synthesis Engine that would be used in the GPL java runtime, replacing the old proprietary one. It is a wave table synthesizer supporting the standards: DLS2, SoundFont2 and also audio files as sound banks. It is worth to try. A MIDI file player is included. A few quick tips: $ unzip gervill-1.0.zip $ cd gervill/bin $ java -Xmx256M simplemidiplayer.SimpleMidiPlayer (the -Xmx256M argument gives 256 Mb to the player, enough to load a big, good soundfont like General User 1.4 by Chris Collins.) > Any and all suggestions are most welcome, I'm totally clueless when it > comes to debugging Java. You can find here some basic FAQ documents: http://www.jsresources.org/index.html Maybe you can start trying some basic program, like the SimpleAudioPlayer http://www.jsresources.org/examples/SimpleAudioPlayer.html copy the source code to a file named "SimpleAudioPlayer.java", or download the examples from SF, http://sourceforge.net/project/showfiles.php?group_id=11738 compile it with the command: $ javac SimpleAudioPlayer.java Run the class with: $ java SimpleAudioPlayer yourfile.wav If it works, your java sound is working. If not, maybe there is some error message giving a clue. Regards, Pedro _______________________________________________ Linux-audio-dev mailing list [email protected] http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev
