Frequently Asked Questions

Here is a list of frequently asked questions / issues:

  1. I followed the installation instructions, but when I double-click on JEM.jar nothing happens (or I get an error message).
  2. When I play music with JEM, the music hesitates initially.
  3. JEM loads very slowly.

1.  I followed the installation instructions, but when I double-click on JEM.jar nothing happens (or I get an error message).

JythonMusic and JEM runs on top of Java.  Apparently your computer came without it.

Install the Java SE Development Kit for your computer (nothing else should be needed).


2.  When I play music with JEM, the music hesitates initially (with some notes running too fast or missing at the beginning).

Increase the memory available to Java (i.e., allocate more memory to JEM) as follows:

http://www.wikihow.com/Increase-Java-Memory-in-Windows-7

The process for Mac and Linux is similar.  For Mac, go to System Preferences / Java.  This will open the Java Control Panel.

Suggestion:  If you have enough RAM (say, 8GB), try the following parameters: -Xms4g -Xmx4g


3.  JEM loads very slowly.

Increase the memory available to Java – see question 2.