VOGONS


First post, by flamingpentium

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Hi all,

I just finished my DX2-66 build which has an SB16 (CT2230) and a GUS PnP. I've been trying out midi emulation with Falcosoft's excellent Midi Player, with some VSTs ,and then passing the output back from my desktop back to the DX2-66 either on the SB16's line in or the Gus's line in.I'm trying to duplicate Phil's awesome roland emulation 2.0 project: https://www.philscomputerlab.com/roland-midi- … project-20.html.

My problem is that both end up with output (on speaker out) that is very noisy / scratchy. I thought maybe it was the audio cables or my speakers but I've since ruled those out.

Neither card seems to have very little noise when played as a single card using speaker out, or in dual setup with Gus speaker to SB16 line in or vice versa. So I'm not sure what would explain both cards outputting lots of noise when used with the midi emulator on line in. For clarity at this stage I am not sending a midi signal from either card to my desktop. It is just straight output (playing midi files on Midi Player) from the desktop to the line in on either card.

Grateful for any insights on this.

Thanks

FP.

Last edited by flamingpentium on 2022-09-09, 12:24. Edited 1 time in total.

Reply 1 of 3, by digistorm

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You may have created a ground loop. If your cables are long and/or the computers are far apart or share another common device like a monitor. If the scratching changes with screen output or mouse movement from your VST computer, chance is high it is a ground loop.

Reply 2 of 3, by flamingpentium

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Hi thanks for the suggestion. I don't notice much difference when I move the mouse on either machine, but I will look at putting in one of those ground loop isolators and see if that makes a difference.

Reply 3 of 3, by flamingpentium

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@digistorm thanks for your help, adding in a ground loop isolator from the VST host PC to the line in, cleared up the static completely. Will mark as solved.