Hi,
I have this synthesizer Studio electronics ATC-1 form 1996. It works well but there is some disturbing kind of sine (i guess) sound at around 8 Khz. For now I filter it out with an eq and can perfectly use the synthesizer. But I wonder what this could be. Any idea on what to verify (I only have a multimeter) or what to look at or possibly replace to understand where this disturbing sound is coming from an how to maybe fix it? The photos added are the synth inside and two print screens (synth switch on and synth switched off) of a software spectrum analyzer showing the two loudest (and more) peaks that are disturbing.
Filtering out the lowest hum around 50Hz (Europe) does not seem to remove the higher signals? and an eq at 50Hz is removes so much of the sound produced by the (bass) synth.
(I bought this synth second hand many years ago and this disturbance has always been there, I suppose it should not be present, for the years I have use it the disturbance was always audible)
Thank you for having a look.
I have this synthesizer Studio electronics ATC-1 form 1996. It works well but there is some disturbing kind of sine (i guess) sound at around 8 Khz. For now I filter it out with an eq and can perfectly use the synthesizer. But I wonder what this could be. Any idea on what to verify (I only have a multimeter) or what to look at or possibly replace to understand where this disturbing sound is coming from an how to maybe fix it? The photos added are the synth inside and two print screens (synth switch on and synth switched off) of a software spectrum analyzer showing the two loudest (and more) peaks that are disturbing.
Filtering out the lowest hum around 50Hz (Europe) does not seem to remove the higher signals? and an eq at 50Hz is removes so much of the sound produced by the (bass) synth.
(I bought this synth second hand many years ago and this disturbance has always been there, I suppose it should not be present, for the years I have use it the disturbance was always audible)
Thank you for having a look.