Is it safe to plug keyboard out into the LR-16 Recorder?

[quote=”Atheros” post=2904]The image says “R” is not connected, no contact. So how would it do any damage if it’s physically not connected at both ends?[/quote]

I don’t know which image says that but this cable has a TS connector on both ends (of course there’s no Ring contact in this case) this means it has two pole Tip (signal) and Sleeve (ground) and this pole is common with the Ring pin.