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#1609860 - 04/15/19 09:24 PM Problem routing VS2400 audio to SI-24 OUTPUTS via R-bus
Rikirat Offline
Space Cadet


Registered: 11/14/06
Posts: 3
Loc: Twin Cities, Minnesota USA
I am hoping someone might be able to assist me. I have an SI-24 connected via an original Roland R-bus cable to a VS-2400CD. My "R-BUS Remote Control" on the 2400 is set to "On" and the 2400 recognizes the SI-24. I have used this setup for years and most everything works. Faders sync and run with automix, XLR and TRS inputs on the SI-24 pass signal to the 2400, etc. Everything seems to connect except for the outputs on the SI-24. Anything I patch from the 2400 to the SI-24 outputs sounds extremely distorted (95% noise %5 signal) or I get noise with no signal. I doubt the issue is the cable as I get the same crap to all outputs on the SI-24. I suspected the SI-24's D/A converter could be bad, but when I switch outputs 7/8 to digital instead of analog, I get the same 95/5 distortion (using a different digital device for listening). Since 7/8 set to digital bypasses the D/A converter, I should get a good signal even if the converter is shot. Something within the SI-24 appears to be generating the noise/distortion.

I am assuming that since most literature states that the R-bus is bi-directional, I should be able to route across the R-bus to the analog outputs on the SI-24. Are there additional settings I'm missing on the 2400 to make this work? Sync, MIDI, clocking, anything?

I have searched the forums and found a couple of people stated that "output to the SI-24 simply does not work". However, one person stated that the headphone out on the SI-24 works by routing R-bus 7/8 to the monitor bus. I have done this and get the same noise on the SI-24 headphone out as I get on the other outputs.

My next step would be to buy another SI-24 (only to find the new one doesn't output either????)

Any help would be greatly appreciated. Thank you.

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#1612726 - 05/09/19 03:45 PM Re: Problem routing VS2400 audio to SI-24 OUTPUTS via R-bus [Re: Rikirat]
Rikirat Offline
Space Cadet


Registered: 11/14/06
Posts: 3
Loc: Twin Cities, Minnesota USA
Last week I purchased another SI-24 via eBay. The newly purchased unit looked as if it had been stored uncovered in a garage for many years. I was concerned about the condition of the faders so rather than replacing my clean SI-24 with the filthy machine, I decided to swap the mainboards instead. Fairly easy part swap. I hooked the SI up to my VS-2400CD and sure enough, I now have four additional pairs of outputs to use as AUX sends or DIR paths. Contrary to what has been stated in several posts here, the R-bus cable is fully bi-directional and supports eight additional inputs to the VS as well as eight outputs from the VS.
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