Noisy Analog Section
Posted: 08:00, 4 February 2018
There’s a rather large amount of noise before the filter section that ruins just about any patch that isn’t very full of harmonic content. It doesn’t occur using digital parts, and it isn’t a 60hz hum (covers my entire spectrograph) and I’ve tried multiple power supplies at multiple locations, which I hoped it would be.
While it does get boosted with mixer and drive, it doesn’t disappear all the way even with oscillators totally mixed out, which totally ruins even using just the self-resonating filter as a sine.
I bought it second hand without original proof of purchase and after many emails back and forth with rather painful support, they told me to take it in for diagnostic at their authorized shop nearby because they were stumped. They first said they couldn’t hear it and wouldn’t believe the scope images were from the JD-XA, so I had to record a video and edit in the example’s audio being run through a spectrograph side by side; to which they finally conceded something was wrong but wouldn’t provide any warranty information.
Is this noise something you folks have? There aren’t any demo units or folks in possession of one near me to do an A/B with, so I’d rather know if it’s normal, and it’s just a noisy synth. I love this buddy and have been incredibly inspired by it, so it’s a pity.
Is it possible to get schematics for any of the newer gear? It’s doubly frustrating because I’m comfortable with schematics and SMT rework and I just don’t have the information to go off of.
Thanks a bunch,
Michael
While it does get boosted with mixer and drive, it doesn’t disappear all the way even with oscillators totally mixed out, which totally ruins even using just the self-resonating filter as a sine.
I bought it second hand without original proof of purchase and after many emails back and forth with rather painful support, they told me to take it in for diagnostic at their authorized shop nearby because they were stumped. They first said they couldn’t hear it and wouldn’t believe the scope images were from the JD-XA, so I had to record a video and edit in the example’s audio being run through a spectrograph side by side; to which they finally conceded something was wrong but wouldn’t provide any warranty information.
Is this noise something you folks have? There aren’t any demo units or folks in possession of one near me to do an A/B with, so I’d rather know if it’s normal, and it’s just a noisy synth. I love this buddy and have been incredibly inspired by it, so it’s a pity.
Is it possible to get schematics for any of the newer gear? It’s doubly frustrating because I’m comfortable with schematics and SMT rework and I just don’t have the information to go off of.
Thanks a bunch,
Michael