Yes, you can change the default duration for the walkout song view and the inning break view.
If you go to the settings applet for your device, you should see an icon for Walkout Song DJ settings. Tap that icon and it should bring up selectors for the default duration controls.
The installation defaults are 11 seconds for walkout songs and 120 seconds between innings, but you can pick a default anywhere from 7-20 seconds for walkouts and 70-160 seconds between innings.
If you have a need for a value beyond those ranges, please post here and we can try to add that option in future versions.