Boss SY-1000 F.A.Q.
Started by houserockr, December 23, 2020, 05:12:21 AM
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Quote from: Tonemasterus on December 23, 2020, 06:58:51 AMMine are dead quiet. There is some ground loop settings in the menu. I'm using batteries though rechargeable 9v. David
Quote from: PAH on December 23, 2020, 10:50:27 AMTry switching a S/R loop on and off with nothing plugged into the send or return jack. The GT will internally connect send and return in this case in the analog domain, so it is logically equivalent to a patch cable between send and return, but eliminates the cable. If enabling a normal mode Send (100) /Return (100) loop with nothing connected to send or return introduces a lot a noise, I'd say you've got a bad unit.
Quote from: houserockr on December 24, 2020, 01:12:53 AMSo I just tested an s/r loop without anything connected to it and when I turn it on in the fx-chain, it introduces noise. The same noise I've been observing all the time, even with pedals and cables connected to it.I'll make a video and upload it to youtube, so you guys can get an idea of the level of noise. It's not much in a crunch sound, but in high gain settings, it becomes unbearable.
Quote from: admin on December 24, 2020, 07:20:37 AMmake ONE custom 1/4" TS patch cable for the GT-1000 Core FX Loop for the FX Loop Return from external FX - but with its Ground Shield lifted (i.e. only a Tip connection - Shield connected only at one end of the TS cable - often tames pedal board ground loop noise on complex modern pedal board - Ground loop Noise manifests today as white noise "HISSS" - due to all the internal DSPs and Switch mode power modules internal on our favorite effects and label any custom "Open ground" cables you make - as they may not work anywhere else but on the pedal board FX loop connection.
Quote from: admin on December 24, 2020, 07:20:37 AMmake ONE custom 1/4" TS patch cable for the GT-1000 Core FX Loop for the FX Loop Return from external FX - but with its Ground Shield lifted
Quote from: PAH on December 28, 2020, 08:40:12 AMMy GT-1000 does not introduce any perceptible noise when I turn on a S/R loop with nothing connected.Whenever I use my piezo bridge, I have a loop enabled, and use the return as an alternate input - no noise.My bass patch, has a S/R loop enabled at the front end of the chain. Usually, I don't have anything connected to that loop, but it gives me the option of plugging my bass into that return, so I can switch between guitar and bass without unplugging and plugging the cable from/to the instruments - no noise regarless of whether I have my bass connected to the return, or nothing connected to it.
Quote from: gumtown on December 28, 2020, 02:48:11 PMTry this, since going into a mixer input, there is a possibility that the GT-Core, pedals and guitar are not actually grounded to ground (as in to the general earth mass via mains outlet earth connection).Try plugging in a grounded guitar amp (plugged into the mains), it can be switched off, and a guitar lead from the grounded amp to any socket on the GT-Core.or a copper wire from the GT-Core chassis to a grounded metal item.also check that your GT-Core does not have a USB cable plugged into a computer too (try with or without USB cable connected).
Quote from: houserockr on December 29, 2020, 03:22:11 AMThanks, that was actually a very promising idea! Especially because the chassis of the GT1kCore has a dedicated ground screw.I connected that screw with a ground wire from an audio RCA cable to my heater (which in Germany are grounded).Unfortunately, that introduced additional hum. Hum as in 50 cycle hum. Which means by doing that I introduced a ground loop.No USB was connected.I don't have an actual amp, so I can't test that atm, unfortunately.
Quote from: szszoke on December 30, 2020, 03:17:18 PMTry playing around with the ground lift settings under MENU > HARDWARE SETTINGS > GROUND LIFT.How close do you live to your friend? Could something in the grid cause your issues?
Quote from: vtgearhead on December 29, 2020, 01:05:17 PMNot sure about German electrical code, but in the US a device can be grounded per standards and still be at a potential large enough to cause noise in high-gain audio systems. In environments were you need quiet audio (theater, recording studio) it's typical to return all grounds separately to the best actual ground available - usually cold water entrance point. I'm not surprised it got noisier when tied to the heater.