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User Related Issues

Sun Java Related Issues


Apple Java Related Issues

GENERAL : Known Issues

Windows: ListenUp Slow to Load First Time

The first time that ListenUp is used it can take several seconds to load. But it load faster after the first time. This is because the JAR files must be download from the server the first time. After that the JAR files are loaded from the cache. Also note that some anti-virus scanners like to scan download Applets and some are a bit slow.

WinXP with Sun Java: The close() method hangs!

Bug: There is a bug with JavaSound in 1.4.1 on WinXP that can affect JavaSonics apps in some rare circumstances. The close() method on a stream can sometimes hang! Below are the bug reports from SUN.

http://developer.java.sun.com/developer/bugParade/bugs/4383457.html http://developer.java.sun.com/developer/bugParade/bugs/4635534.html

Workaround:The Sun Java 1.4.2 plugin apparently fixes this problem. You can check your version and download the latest Sun Java Plugin from here.

Bug: Mac OS: ListenUp record not working with Firewire

Bug: When using ListenUp with a firewire device on a Macintosh, ListenUp is unable to successfully record data or records data at a very increased rate.

Workaround: Unplug the firewire device, restart the computer and relaunch ListenUp.

Bug: Mac OS: Audio might play back at wrong pitch

ListenUp uses JavaSound to record audio. Apple JavaSound (as of 3/4/08) can only record at 44100 Hz. We perform sample rate conversion inside ListenUp to support other sample rates.

Bug: There is a bug in Apple JavaSound. If the audio hardware is configured to record at a rate other than 44100 Hz then JavaSound will record faster or slower than 44100. But ListenUp will think the data is at 44100 Hz. When the audio is played back it may sound higher or lower in pitch. If it is low in pitch then it will also sound slower.

Workaround: Configure your audio hardware so that it records at 44100 Hz. This might involve setting a physical switch on an external device. Or it may involve using the "Audio MIDI Setup" program in the "Applications/Utilities" folder.

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