To better clarify what PhillyJazz is trying to say, the Ketron SD2 is controlled by all MIDI commands.

You can hook it up to a computer and run softwares such as BiaB and many others that can send those commands, in order to select Patches and other things.

BUT -- one can also run the SD2 in realtime using a MIDI Controller Keyboard, MIDI Guitar Controller or MIDI Wind Instrument as well.

At turn on, the SD2 comes up in GM mode. The GM voices are very much superior to most other "GM" MIDI synths and can be used on live gigs, I've done it.

Accessing the Upper Banks sounds takes a bit more savvy and sometimes programming of your MIDI controller, but once you get the hang of sending hose three upper bank commands, you can access all the great patches from your Controller as well.

The SD4 is actually two SD2's in one box. One is dedicated as "GM" for input from say a computer, and the other has a separate MIDI input and is called the "Solo" MIDI input for use with an instrument. It also has buttons and a keypad on its slanted front that allows you to enter Patch numbers right there and select them. That is what PhillyJazz is talking about.

I run an SD4 in the studio, but I do indeed control it most of the time using my M-Audio Keystation Pro 88 to select those parameters right from the keyboard.


--Mac