fleabag Posted April 10, 2023 Share Posted April 10, 2023 (edited) My rhyth git has a Digitech F300 footswitch for one of his Roland rack units, and the TRS 1/4" cable he uses doesnt work all functions. Does a 3 button footswitch require a TRRS 1/4" cable ? I doubt it because the Digitech FS3X , similar 3 button switch, says it only requires a TRS 1/4" cable in the specs, but maybe the FS300 is slightly different in operation ? FS300 Here in the link is the simlar FS3X https://www.promenademusic.co.uk/Digitech-FS3X-Footswitch Edited April 10, 2023 by fleabag Quote Link to comment Share on other sites More sharing options...
BigRedX Posted April 11, 2023 Share Posted April 11, 2023 I can't find any definite information, but I would suspect that it's not simply wired so that each switch is attached to a separate conductor on the cable, and therefore will only work when connected to the right equipment - in this case another Digitech device. I'd start by plugging in a TSR cable and checking with a multimeter what happens when you press each footswitch. Alternative open up the unit and see what's inside. 2 Quote Link to comment Share on other sites More sharing options...
rmorris Posted April 11, 2023 Share Posted April 11, 2023 From not my work - seems uses diode logic to signal 3 x switch states https://www.pinterest.co.uk/pin/353884483200361260/ 1 Quote Link to comment Share on other sites More sharing options...
fleabag Posted April 11, 2023 Author Share Posted April 11, 2023 (edited) That looks like it would use a regular TRS cable, so its a probability that his cable might be faulty, or even the footswitch might have a fault Edited April 11, 2023 by fleabag Quote Link to comment Share on other sites More sharing options...
BigRedX Posted April 11, 2023 Share Posted April 11, 2023 What Roland device is he trying to make it work with? It would be worth having a look at the relevant page in the Roland devices manual regard compatible footswitches. Given the circuit diagram that has been posted is correct I suspect that the matrix switching the Digitech pedal sends doesn't exactly correspond to the matrix switching the Roland unit expects to receive. And why should it? They are devices from different manufacturers. Once you have pedals with more than two switches connected by a simple two conductor and earth cable there are no guarantees that a switch from one manufacturer will work with a device from another. 3 Quote Link to comment Share on other sites More sharing options...
fleabag Posted April 11, 2023 Author Share Posted April 11, 2023 Yes, thats a good point. A Digitech footswitcher into a Roland rack unit harmoniser. Probably a bad recipe. That could simply be the whole problem. I might suggest he finds the Roland pedal that suits his rack unit. Probably difficult to find these days as i think the rack unit is probably 80's/90's from his solo career Quote Link to comment Share on other sites More sharing options...
rmorris Posted April 11, 2023 Share Posted April 11, 2023 1 hour ago, fleabag said: That looks like it would use a regular TRS cable, so its a probability that his cable might be faulty, or even the footswitch might have a fault Yes. But from a quick look it seems designed to work with other bits of Digitech kit. And there seem to be options on how you set those up to operate with the footswitch. ...And I see BigRedx and fleabag have commented alongg similar lines while I had to go do something else. Quote Link to comment Share on other sites More sharing options...
BigRedX Posted April 11, 2023 Share Posted April 11, 2023 (edited) IME unless they have a specialised dedicated foot controller Roland devices are usually designed to work with the appropriate Boss FS5 footswitches. There are two types FS5U (unlatched/momentary) and FS5L (latched). These are still available although quite pricey. Edited April 11, 2023 by BigRedX 1 Quote Link to comment Share on other sites More sharing options...
fleabag Posted April 11, 2023 Author Share Posted April 11, 2023 More good points. I would hazard a guess and say ' Latching ' would be the right pedal, because AFAIK, momentary pedals means one has to keep one's hoof on the pedal. I'll check for the FS5L Quote Link to comment Share on other sites More sharing options...
rmorris Posted April 11, 2023 Share Posted April 11, 2023 1 hour ago, fleabag said: More good points. I would hazard a guess and say ' Latching ' would be the right pedal, because AFAIK, momentary pedals means one has to keep one's hoof on the pedal. Not necessarily. The kit may be designed to switch on/ off etc on successive momentary switch events. Eg most fx pedals use a momentary switch which toggles the fx on/off via a bit of hardware logic. See a schematic of eg a boss fx pedal. 2 Quote Link to comment Share on other sites More sharing options...
linear Posted April 11, 2023 Share Posted April 11, 2023 Can you find out exactly what model this Roland unit is? Then you can maybe track down a manual or at least some guidance as to what kind of footswitch it's expecting. Once you know that, it all becomes a lot easier. 1 Quote Link to comment Share on other sites More sharing options...
fleabag Posted April 11, 2023 Author Share Posted April 11, 2023 Yup, thats the answer. Not till i'm back in the rehearsal room though 1 Quote Link to comment Share on other sites More sharing options...
dudewheresmybass Posted April 12, 2023 Share Posted April 12, 2023 I have an fs3x I use to switch stuff on my TC bh250 amp. In that situation it uses a TRS cable. perhaps not massively relevant in your situation, but you never know LOL Quote Link to comment Share on other sites More sharing options...
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