Hi Barry. Thanks for the reply - I greatly appreciate it!

By low S/N ratio, I mean it is considerably lower than other sound sources I am using, e.g. a Boss guitar effects processor (specified to be 90dB S/N ratio). I can't really perceive the noise from that device, so the keyboard noise must be at least a couple of orders of magnitude 'worse'.

The noise is a typical amplifier hiss, characteristic of lossy transistor amplification.

I am running the WK3000 phones jack through a stereo cable into the stereo line-in on a Sound Blaster AWE64 soundcard, and recording straight to hard disk.

My guess is that the impedance/voltage of the phones jack is more suitable for driving headphones than a line in through a couple of adaptors and a cable, since the noise is less noticable when headphones are plugged straight into the keyboard.

Maybe I should just run some light noise reduction and a threshold gate on the recorded files during production?

I look forward to hearing your ideas!

Thanks again for the reply.

Brad.