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An inexpensive solution to the USB connection ground hum noise issue in Roland Boutiques : r/synthesizers
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Roland K-25m Boutique Series Keyboard Unit Bundle with Startech UUSBHAUB6 USB Type A to Micro USB B Cable - 6 foot | Reverb
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Yustda New USB PC Charging Cable PC Laptop Charger Power Cord Replacement for Roland JX-03 JU-06 JP-08 JX03 JU06 JP08 Sound Module Roland Boutique TR-09 TR09 Rhythm Drum Machine Composer - Walmart.com
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