The only connectors on my Ketron SD-2 are RCA stereo output connectors, MIDI in and MIDI thru connectors, and an electric power connector for the wall brick on the back. The front has a headphone jack and volume control.

If there's a USB connector on it, it is very well hidden.


John

Laptop-HP Omen I7 Win11Pro 32GB 12TB SSD
Desktop-ASUS-I7 Win10Pro 32GB 12TB SATA

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