A sequencer (sometimes called DAW – digital audio work station, or host – hosting application) is the software that you use to record your songs. It can record sound (if you plug in a guitar and record it) and MIDI, for software (for synths, or for that matter – EZdrummer 2 
).
Some of the most used ones are Pro Tools, Logic Pro X, Garageband, Cubase, Reaper, Studio One etc…
You don’t have to use any of the listed above sequencers to use our products. If you are using EZdrummer 1, you can start it with Toontracks Solo application. If you are using EZdrummer 2, you can start it straight away, as it can run directly by it self.
Henrik Ekblom - User Experience Designer
Toontrack
If you’re trying to find MIDI that comes from EZdrummer 2 you can drag the MIDI to the Tap2Find box in EZdrummer 2. Later versions of Pro Tools doesn’t allow drag and drop from Pro Tools to other software (such as EZdrummer 2). You can in that case record arm the song track and play the MIDI from Pro Tools. In that way the MIDI will be recorded to EZdrummer’s song track. After that, drag the MIDI block to the Tap2Find drop zone and EZdrummer 2 will list similar sounding beats. 
Henrik Ekblom - User Experience Designer
Toontrack
Have you record enabled your track in Studio One 2? If not, MIDI isn’t sent to EZdrummer 2…
To my knowledge – ASIO4ALL can only serve one sound source at a time, meaning that you can’t listen to an MP3 or something else, in the same time as playing EZdrummer 2. However – this is a much discussed topic and there may be a solution if you google it
Henrik Ekblom - User Experience Designer
Toontrack
