NOTE: Omnisphere 2.5 is 64 bit compatible only. If the DAW you’re using is 32 bit, then you’ll need to use Omnisphere 2.4.2c as that version is 32 bit compatible.
These are the same steps for each Spectrasonics instrument.
1. Click on the + button and select Add Instrument Track
2. Select VST, then select your Spectrasonics instrument and press Okay.
3. A rack for your instrument (i.e. Omnisphere) will automatically be created and the GUI will open up.
4. To reopen the instrument, click on the upward Arrow button located in the top right corner of the instrument rack (as shown in picture below):
Here's a downloadable template for a single instances of each Spectrasonics instrument in Mulab 7: