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kleod9 posted in the group Roland SH-4d Synthesizer Group
Hello all, I have an issue with my new sh-4d that I’m curious whether it’s an unique issue to my particular device or is common to others…
If I power my device to a powered USB computer hub or direct to the computer in any combination I can hear a grounding hum – the only option I’ve found that I can get the hum to disappear is to power the sh-4d with batteries or a USB power bank… which is fine, but when I’m working with the sh-4d in the studio, it would be better to power it with a constant electrical source which I have not figured out how to do without the hum which shows up…Read More4 Comments-
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Yes it’s a common problem when powering synths from the PC USB port. I have experienced it with my Roland SH-4d and T-8, and the Uno Synth Pro. As @kpatzsc said, it’s best to power separately if you can. I’ve also seen people recommend using a USB isolator so maybe worth having a look at something like this… https://hifimediy.com/product/usb-isolator/
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![Profile picture of Alex]()
No problem! Let us know how you get on 🙂
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SynthGroups posted in the group iPad Music Apps
The Drambo Group has been changed to the “iPad Music Apps” group so you can now post about any apps your using to make music 🙂
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kpatzsc posted in the group Dawless Jamming
Dawless Porch Ambient Jam featuring the Moog Matriarch and Walrus Audio Slöer Reverb Pedal.
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spock
This is a common issue on many of Roland’s USB powered synths. AFAIK, you could try a USB isolator cable, or use a separate USB power supply like a phone charger to power the SH-4d, and use DIN MIDI instead of USB.