I received a Beads today - which is fantastic by the way! I’ve been using Clouds for years and I really appreciate the new simple layout and improved features.
However, I have spent the entire afternoon trouble shooting and trying to figure out how to get rid of the constant high pitched tonal noise coming out of the outputs.
First the auto gain feature took me by surprise. When for example a silent VCA output is patched to Beads it attempts to find a signal and increases the gain by the maximum amount which introduces a whole lot of noise if Beads is patched straight to a mixer. I managed to find unity gain for input signals manually by using a test tone and disabling auto gain. Unity gain on my module seems to be around 22:00 on the feedback knob. There seems to be constant high pitched tones coming from the output at around 4kHz and 8kHz when monitoring audio via inputs. This is incredibly distracting as I’m quite sensitive to background noise.
My first thought was that Beads had somehow caused a ground loop problem in my rack. I spent a while taking everything out of the case and testing different module positions. This did not help, the high pitched noise was always present.
I then connected the output of my rack mixer to my AD converters without anything connected to its inputs (baseline noise floor inaudible at working levels -90 dbfs peak). I then started connecting the outputs of a few other modules (Rings, Plaits, STO, Mangrove) - still inaudible noise floor. I then connected the output of Beads and the high pitched ringing was present, disconnected Beads from the mixer and the ringing went away.
I then ran the Beads output through a DI box with a transformer and ground loop switch which did not help and then used a ground loop isolator which also didn’t change things.
Finally I put Clouds back in my rack just to compare noise floors. The Clouds output was notably less harsh when compared to Beads (in fact inaudible at working levels). I tested this by using a sine wave through both the input of Beads and Clouds and making sure the output level was identical from both modules. I then removed the sine wave from the inputs and listened to the noise floor. Beads notably more difficult to listen to because of the high pitched ringing.
Now I’m stuck and don’t know what to do.
I’ve taken a screenshot of the noise floor frequencies and recorded the outputs of my mixer with Beads connected and disconnected. If anyone could help I would be more than thankful!