I have both here.

**When using the separate "Solo" bank of sounds on the SD4, you cannot use the Thru channel inside BiaB and the Harmonies with one finger, etc. This is because BB uses the "GM" side of the SD4 as its sole MIDI output. Don't let that "GM" term fool you into thinking that only one bank of 128 sounds is all that's available there, though, for it really indicates that the exact same set of sounds available in the SD2 are available in the SD4's "GM" Bank.

Selection of Patches using the buttons on the top of the SD4 has been a disappointment. There is about a 1-2 second LAG between button push and actual soundbank change. I ended up having to use a programmable MIDI keyboard controller in order to be able to switch sounds instantly when playing live with the SD4.

All in all, I recommend the SD2 as the best bang per buck.

The SD4 may have a place for the person playing live with a static sequencing program or an auto-accompaniment keyboard, though.

For use with PGMusic products, SD2 gets R done and without as much to keep track of.

Same sounds. Just not in two separate synths in the same box.


--Mac

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