Check the velocity levels of the notes although that shouldn’t matter all that much. There’s a couple of us here that are escapees from the BFD ecosystem. When you say 0dB are you looking at a level meter? Keep in mind that the way drum samples are treated in BFD are way different than in SD3. The processing is completely different in not just the samples themselves but in the mixer especially if you’re using presets in SD3.

Welcome to the new world of drum vi’s. SD3 has a learning curve.

a quick search didn’t turn up anything in the manual,
but there is an overall output level fader in the bottom right
below the Song Track.

(not my image)

midilance wrote:

My velocities are the same that I used with BFD3.5.  I’m a longtime user of BFD3.  An open SD3 near the top right shows Level  0.0. I haven’t been able to find where to “up” my output.  It’s really low.

Superior Drummer 3 version: 3.4.2
Operating system: macOS Tahoe (26)

‘An open SD3 near the top right’ – where exactly are you looking? To raise your levels you need to go into the SD3 mixer and make changes there. But going back to the velocities – they may be the same as you used in BFD but you have to take into account velocity curves and such and those are NOT the same in every drum vi. Also as I wrote the processing in BFD and SD3 are totally different; BFD tends to have drums that are more processed in a different way than in SD3. THAT will make a huge difference.

I’d suggest taking a tour through YouTube videos and the SD3 manual. You can’t just drop stuff done in BFD and drop it into SD3 and expect the same thing. SD3 presets should only be taken as starting points – they are not going to be perfect for everyone. For myself I don’t use presets in SD3 but break things out into ProTools sessions with each drum or group of drums on their own channel. IOW – I treat them like I would a real drum kit.