My OP-1 generates a high pitch noise when using the line in jack. It’s disturbing because it gets recorded when i try to sample or record directly to tape.
Sounds like mine sometimes. Is your usb connected?
For me depending on what usb gear I have hooked up, determines how bad the noise is.
It has to do with the a ground loop between the audio and usb.
I’ve been considering getting a hum eliminator/transformer isolator or even a usb isolator.
It can be really annoying!
^ I think that is “normal”, at least mine does that as well… the OP-1 input circuit seems very susceptible to digital noise, probably created by itself.
I can’t remember now if the gain control applies to the line in or just the mic, if both then you could try leaving it at the lowest setting and pre-amping your signal externaly.
@punji yes it seems the noise is created by the OP-1
i can hear variations in the hiss depending on what page i’m on. if tape is running for example i can hear the internal clock “ticking” (and it isn’t the metronome)
and no gain control doesn’t affect it.
it’s odd because my previous op-1 had a different kind of constant hiss but which was smoother sounding. i actually liked it
i could tune it with the volume knob and the noise wasn’t recorded.
"it's odd because my previous op-1 had a different kind of constant hiss but which was smoother sounding. i actually liked it
i could tune it with the volume knob and the noise wasn't recorded."
If i had to guess that's because your old OP-1 was on a previous OS which had different noise floors ( which i remember was disscussed on the old opeewon site)
