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2010-04-17 by sean_process
Hi Anybody have any experience with CTM64? Mine's not sending any MIDI output when triggered, and the triggering doesn't dim the LED. Incoming MIDI dims the LED OK. Is there something I should check before sending it to München? thanks sean
2010-04-19 by sean_process
Hi Florian I'm aware of the triggering setup for the CTM64 and how it works with shorting a pin to ground to get a trigger. I was using it about 8 years ago with a calculator keypad attached to my bass guitar to trigger MIDI events in Logic. I haven't powered it up for ages and it doesn't want to play nicely anymore. I've tried shorting the ground pin to any of the individual contact pins but it doesn't output a trigger. All the jumpers are in place and haven't been moved since the original setup. I have no experience with PIC chips so am not sure how serious/terminal a problem this is. Anybody experience anything similar? Sean --- In Doepfer_a100@yahoogroups.com, Florian Anwander <fanwander@...> wrote:
> > Hi Sean > > > Mine's not sending any MIDI output when triggered, and the triggering doesn't dim the LED. > > Just to make clear, that I do not misunderstand you: You know that the > CTM64 does NOT convert triggers to MIDI? It is intended for old organ > keyboards (and similar) which have one common wire, and 64 contacts, > which can be switched to this wire. > > IT DOES NOT WORK WITH TRIGGER INPUTS! > > Florian >
2010-04-19 by Florian Anwander
Hi Sean > Mine's not sending any MIDI output when triggered, and the triggering doesn't dim the LED. Just to make clear, that I do not misunderstand you: You know that the CTM64 does NOT convert triggers to MIDI? It is intended for old organ keyboards (and similar) which have one common wire, and 64 contacts, which can be switched to this wire. IT DOES NOT WORK WITH TRIGGER INPUTS! Florian
2010-04-19 by yahoo@doepfer.de
Sean, you find my comments written inline. Dieter Doepfer > I'm aware of the triggering setup for the CTM64 and how it works > with shorting a pin to ground to get a trigger. That's not the way how the CTM64 works ! Please refer to the CTM64 information: " Pay attention that only free contacts can be used. This means that the contacts are not allowed to be connected with another electronics or connected with a fixed voltage (e.g. GND)." > I was using it about 8 years ago with a calculator keypad attached to my bass > guitar to trigger MIDI events in Logic. I cannot imagine that this was working ever ! The 64 connectors of the CTM64 are outputs (!) that are normally in the high state and change to the low state for 1/64 of the scanning time. If you connect one of the CMT64 pins to GND nothing will happen. You have to use the common feedback rail (attention: this is not GND but a line that carries the scanning feedbacl signal) to make the CMT64 working. For details please refer to the CTM64 user's manual > I haven't powered it up for ages and it doesn't want to play nicely anymore. > I've tried shorting the ground pin to any of the individual > contact pins but it doesn't output a trigger. That's what I would expect.
> All the jumpers are in place and haven't been moved since the > original setup. > > I have no experience with PIC chips so am not sure how > serious/terminal a problem this is. > > Anybody experience anything similar? > > Sean > > --- In Doepfer_a100@yahoogroups.com, Florian Anwander > <fanwander@...> wrote: > > > > Hi Sean > > > > > Mine's not sending any MIDI output when triggered, and the > triggering doesn't dim the LED. > > > > Just to make clear, that I do not misunderstand you: You know that the > > CTM64 does NOT convert triggers to MIDI? It is intended for old organ > > keyboards (and similar) which have one common wire, and 64 contacts, > > which can be switched to this wire. > > > > IT DOES NOT WORK WITH TRIGGER INPUTS! > > > > Florian > > > > > > > ------------------------------------ > > Yahoo! Groups Links > > >
2010-04-19 by sean_process
OK, so my mistake was to call the common feedback rail pin "ground". This is what I was connecting to the other pins to try to generate a MIDI note, as described in the manual, not to an arbitrary ground. Sorry for my initial inaccurate explanation. Sean --- In Doepfer_a100@yahoogroups.com, <yahoo@...> wrote:
> > Sean, > > you find my comments written inline. > > Dieter Doepfer > > > > I'm aware of the triggering setup for the CTM64 and how it works > > with shorting a pin to ground to get a trigger. > > That's not the way how the CTM64 works ! Please refer to the CTM64 > information: > " Pay attention that only free contacts can be used. This means that the > contacts are not allowed to be connected with another electronics or > connected with a fixed voltage (e.g. GND)." > > > I was using it about 8 years ago with a calculator keypad attached to my > bass > > guitar to trigger MIDI events in Logic. > > I cannot imagine that this was working ever ! The 64 connectors of the CTM64 > are outputs (!) that are normally in the high state and change to the low > state for 1/64 of the scanning time. If you connect one of the CMT64 pins to > GND nothing will happen. You have to use the common feedback rail > (attention: this is not GND but a line that carries the scanning feedbacl > signal) to make the CMT64 working. > > For details please refer to the CTM64 user's manual > > > I haven't powered it up for ages and it doesn't want to play nicely > anymore. > > I've tried shorting the ground pin to any of the individual > > contact pins but it doesn't output a trigger. > > That's what I would expect. > > > All the jumpers are in place and haven't been moved since the > > original setup. > > > > I have no experience with PIC chips so am not sure how > > serious/terminal a problem this is. > > > > Anybody experience anything similar? > > > > Sean > > > > --- In Doepfer_a100@yahoogroups.com, Florian Anwander > > <fanwander@> wrote: > > > > > > Hi Sean > > > > > > > Mine's not sending any MIDI output when triggered, and the > > triggering doesn't dim the LED. > > > > > > Just to make clear, that I do not misunderstand you: You know that the > > > CTM64 does NOT convert triggers to MIDI? It is intended for old organ > > > keyboards (and similar) which have one common wire, and 64 contacts, > > > which can be switched to this wire. > > > > > > IT DOES NOT WORK WITH TRIGGER INPUTS! > > > > > > Florian > > > > > > > > > > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > > > > >
2010-04-19 by yahoo@doepfer.de
> OK, so my mistake was to call the common feedback rail pin > "ground". This is what I was connecting to the other pins to try > to generate a MIDI note, as described in the manual, not to an > arbitrary ground. > > Sorry for my initial inaccurate explanation. > > Sean If it's nothing obvious (like a loose connection of the common feedback line) the CTM64 has to be repaired. You may order a new PIC as a spare part but from the distance I cannot guarantee that this will solve the problem. Best wishes Dieter Doepfer