BOSS BR800 input hiss


New member
I have just bought an used BR800 to "have a play with".

One of the things I'm recording is my Kawai CA15 piano. Unfortunately this has no line out, only headphones. I have plenty of level and the sound is fine but my issue is when I stop playing...

When I play nothing I've noticed a brief hiss as if the gain is too high but then it stops quickly like there is a noise compressor on it.

All of the FX are off and I obviously did a factory reset before use so the manual made sense. My input has minimal gain and sits at zero.

Any thoughts out there I could have a look at?