GSpeakers documentation

The Crossover history window

This is a window where you can select which crossover you want to work with. You can also save the list and make backups of crossovers you have tried. This is a useful utility to be able to quickly study differences between two or more crossovers.

The crossover history window

Howto use the crossover history

By clicking on a row in the list you can select the crossover you want to work with. Use the buttons to create backups or new crossovers.

The fields in the table

Id: Id is the unique indentifier for this crossover. Don't care to much about this. Used for debugging.
Identifier: A small text describing this crossover. When you create a new crossover or a copy GSpeakers will set this text to the current date and time.
Type: This is the crossover type. This is a cryptic integer which can be translated to a real filter in the following way:
Lowpass filter: 1
Subsonic filter: 2
Highpass filter: 4
Twoway filter (lowpass and highpass): 8
Threeway filter: 16
Fourway filter: 32

However, you can combine these numbers in a number of ways. For example, a common crossover layout today is a 2.5 way crossover which has two equal bass speakers and one tweeter. One of the bass speakers has a low cutoff frequency (100-1000Hz) and the other bass speaker takes care of the full frequency range up to the tweeter takes over. This would be represented by a binary OR-operation between 1 (for a lowpassfilter) and 8 (for two way filter) and you would get a resulting 9 in the type column for this crossover. In the screenshot all crossovers has type 8 (twoway filter).

The buttons

New copy: Click this button to copy the currently selected crossover and append to copy to the list.
New crossover: Append a new crossover to the list.
New xml: Click here to create a new crossoverlist/xml file.
Remove: Remove the currently selected crossover.
Open: Open a new crossoverlist/xml file.
Append xml: Appends a crossoverlist to the end of the current crossoverlist.
Save: Save the current state of the crossoverlist.
Save as: Save the current crossoverlist to a new filename.
Daniel Sundberg, dss at home dot se