I'm mainly on guitar, but occasionally, I want to add a drumline to my recordings (I've been trying to cover some songs). clicking keyboard keys on Garageband isn't exactly easy to get it on time. And I don't exactly have a drumkit.

What I do have, is an old GuitarHero drum kit from back when I was younger.
Is it possible to turn that into a electric drum kit and use that to record the drum parts?

If not, how do I add a drumline?
You could buy a midi controller or just a drum pad that comes with drum sounds. I bought the Novation launchkey mini mk2 and it came with software and different loops for synths, drums, keyboard, guitar etc. This is how i record other instruments. Hope this has helped you.
Check this:

And also:

I personally don't have any MIDI controllers, so I just write drum part in Guitar Pro, export it as a MIDI file and then import to DAW to use some drum sampler like NI Battery.
Last edited by olegst90 at Feb 3, 2016,
Did some googling,

has anyone ever used "OSCulator" for OSX before?
Is it a good option for converting my GH5 drum kit into a midi controller?
Look into investing into some drum plugins. EZDrummer is cheap and simplistic, Superior 2.0 or Steven Slate Platinum will give you more advanced options. You may need a more powerful DAW than GarageBand to run it tho (Reaper is usually the go-to recommendation, licenses are cheap and you can evaluate the software for free indefinitely).

As for laying down the drum beats: the simple yet tedious way is to just click-program them into a MIDI piano-roll, though what I prefer to do is use a midi drumpad controller (I use an MPD18) and play the beats out. Makes certain parts go quicker and sound overall more "human."