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2005-11-30 by ostin67
Hi, Can anyone explain exactly what the limitations are of the DIY DTXpander. I have looked at the circuit diagram on this forum and I beleive that I can make one but I am not sure what the limitations are? I am right in thinking that I will be able to connect two pads to the one input and assign two seperate voices? Thanks, any information is much appreciated.
2005-12-01 by Keith
--- In DTXpress@yahoogroups.com, "ostin67" <phil@o...> wrote: > >I am right in thinking that I will be able to connect two pads to > the one input and assign two seperate voices? Thanks, any information > is much appreciated. Yes, that is correct. The limitations are: 1. you will not be able to get both voices simultaneously 2. the DTXpress is generally less sensitive to rim hits then hits to the main pad. This seems to be some deliberately function of the module. A more complex circuit with gain can improve the situation a little, but not eliminate it. 3. very small hits to the rim pad could be interpreted as a hit to the centre pad. It is probably best used to add cymbals and cowbells to the tom inputs, for example, where great subtlety is not required on the second pad. A bit of adjustment of the values can be beneficial, e.g. reducing R1 down to 10k for more sensitivity to rim hits, and D2 can be shorted out - it is mainly there for symmetry. Keith.
2005-12-01 by ostin67
--- In DTXpress@yahoogroups.com, "Keith" <keith1200rs@y...> wrote: > > --- In DTXpress@yahoogroups.com, "ostin67" <phil@o...> wrote: > > > >I am right in thinking that I will be able to connect two pads to > > the one input and assign two seperate voices? Thanks, any information > > is much appreciated. > > Yes, that is correct. The limitations are: > > 1. you will not be able to get both voices simultaneously > > 2. the DTXpress is generally less sensitive to rim hits then hits to > the main pad. This seems to be some deliberately function of the > module. A more complex circuit with gain can improve the situation a > little, but not eliminate it. > > 3. very small hits to the rim pad could be interpreted as a hit to the > centre pad. > > It is probably best used to add cymbals and cowbells to the tom > inputs, for example, where great subtlety is not required on the > second pad. A bit of adjustment of the values can be beneficial, e.g. > reducing R1 down to 10k for more sensitivity to rim hits, and D2 can > be shorted out - it is mainly there for symmetry. > > Keith. > Thanks very much for that! I hope to be putting together my expander this weekend !
2005-12-02 by Keith
Let us know how you get on. If you have any problems, email me. Keith.
2005-12-23 by ostin67
Well at long last I have finally built a DTXpander ! However, I am unsure as to what to do next. When I plug it in I don't get any sounds at all ! Do I need to program the DTXpress 3 first? Any help will be much appreciated. Thanks
2005-12-24 by Keith
--- In DTXpress@yahoogroups.com, "ostin67" <phil@o...> wrote: > > Well at long last I have finally built a DTXpander ! However, I am > unsure as to what to do next. When I plug it in I don't get any sounds > at all ! Do I need to program the DTXpress 3 first? Any help will be > much appreciated. Thanks > You should get the main pad sound without any programming. Most of the built in kits have rim sounds programmed as well. If you are getting nothing from the main pad then you have most likely a wiring problem. In particular, make sure the diodes are the right way round. The arrow points to the bar, which is the black line on the diode. Try shorting out D2. Check you have the connectors wired correctly. Tip to piezo, transistor collector to the ring. Otherwise it is likely to be a short circuit. Keith.
2006-02-25 by peatybass
What is the purpose of the DTXpander? Does it allow you to combine two single zone peizo pads into one dual zone input like you would on input 9/10? I am already using input 9/10 for this purpose and have made my own splitter. I have a background in electronics but I'm having trouble understanding the DTXpander circuit. I have the DTXpress I(one) and I'm wanting to add more pads(triggers). If the DTXpander circuit will allow this to happen what inputs can I use? Thanks In advance for your replys.........
2006-02-26 by Stuart Foreman
That's exactly what it does. On inputs 1-8, it allows for two single zone pads to be connected. One would fire the main sound, the other would fire the "rim" zone. I am using one of Keith's earlier designs (splits 4 inputs into 8) and it works wonderful. Stuart Stuart Foreman Datacore Technology Inc. 436 Creamery Way, Suite 100 Exton, PA 19341 PA - 610-524-1311 NJ - 973-568-4977 Fax - 610-524-1311
-----Original Message----- From: DTXpress@yahoogroups.com [mailto:DTXpress@yahoogroups.com] On Behalf Of peatybass Sent: Saturday, February 25, 2006 10:44 AM To: DTXpress@yahoogroups.com Subject: [DTXpress] DTXpander What is the purpose of the DTXpander? Does it allow you to combine two single zone peizo pads into one dual zone input like you would on input 9/10? I am already using input 9/10 for this purpose and have made my own splitter. I have a background in electronics but I'm having trouble understanding the DTXpander circuit. I have the DTXpress I(one) and I'm wanting to add more pads(triggers). If the DTXpander circuit will allow this to happen what inputs can I use? Thanks In advance for your replys......... Community email addresses: Post message: DTXpress@yahoogroups.com Subscribe: DTXpress-subscribe@yahoogroups.com Unsubscribe: DTXpress-unsubscribe@yahoogroups.com List owner: DTXpress-owner@yahoogroups.com Shortcut URL to this page: http://groups.yahoo.com/group/DTXpress Alternate DTXpress site: http://www.dtxpressions.com Yahoo! Groups Links
2006-02-27 by Keith
--- In DTXpress@yahoogroups.com, "peatybass" <peatybass@...> wrote: > > What is the purpose of the DTXpander? Does it allow you to combine > two single zone peizo pads into one dual zone input like you would on > input 9/10? I am already using input 9/10 for this purpose and have > made my own splitter. I have a background in electronics but I'm > having trouble understanding the DTXpander circuit. I have the > DTXpress I(one) and I'm wanting to add more pads(triggers). If the > DTXpander circuit will allow this to happen what inputs can I use? Yes, it allows you to put two single zone pads into one input. However, inputs 9/10 are different - you can do it without an expander box (as you have done) because it is really two seperate single zone inputs. The rest are piezo+rim switch inputs so cannot be split in the same way. There is a limitation to this way of expanding - you cannot hit two pads connected to the same input through the expander. This limitation does not exist on 9/10 because it is two genuinely separate inputs. So, you need to choose the pads to combine with care. Keith.
2006-03-07 by Peaty Sechrist
Thanks for the quick answers guys. I took the easy but an expensive way out and bought another control module. I think I've caught the EBAY bug. I'm in drum heaven now. _____
From: DTXpress@yahoogroups.com [mailto:DTXpress@yahoogroups.com] On Behalf Of Keith Sent: Monday, February 27, 2006 2:27 AM To: DTXpress@yahoogroups.com Subject: [DTXpress] Re: DTXpander --- In DTXpress@yahoogroups.com, "peatybass" <peatybass@...> wrote: > > What is the purpose of the DTXpander? Does it allow you to combine > two single zone peizo pads into one dual zone input like you would on > input 9/10? I am already using input 9/10 for this purpose and have > made my own splitter. I have a background in electronics but I'm > having trouble understanding the DTXpander circuit. I have the > DTXpress I(one) and I'm wanting to add more pads(triggers). If the > DTXpander circuit will allow this to happen what inputs can I use? Yes, it allows you to put two single zone pads into one input. However, inputs 9/10 are different - you can do it without an expander box (as you have done) because it is really two seperate single zone inputs. The rest are piezo+rim switch inputs so cannot be split in the same way. There is a limitation to this way of expanding - you cannot hit two pads connected to the same input through the expander. This limitation does not exist on 9/10 because it is two genuinely separate inputs. So, you need to choose the pads to combine with care. Keith. Community email addresses: Post message: DTXpress@yahoogroups.com Subscribe: DTXpress-subscribe@yahoogroups.com Unsubscribe: DTXpress-unsubscribe@yahoogroups.com List owner: DTXpress-owner@yahoogroups.com Shortcut URL to this page: http://groups.yahoo.com/group/DTXpress Alternate DTXpress site: http://www.dtxpressions.com SPONSORED LINKS Percussion <http://groups.yahoo.com/gads?t=ms&k=Percussion+instruments&w1=Percussion+in struments&w2=Percussion+musical+instrument&w3=Musical+instrument+drum&w4=Lat in+percussion+instrument&w5=Percussion+drum+set&w6=Dtxpress+iii&c=6&s=168&.s ig=_c3P9NlKQlBG4rVLP8RxnA> instruments Percussion <http://groups.yahoo.com/gads?t=ms&k=Percussion+musical+instrument&w1=Percus sion+instruments&w2=Percussion+musical+instrument&w3=Musical+instrument+drum &w4=Latin+percussion+instrument&w5=Percussion+drum+set&w6=Dtxpress+iii&c=6&s =168&.sig=DBi-gOi_-zwWtrQZpliQ8g> musical instrument Musical <http://groups.yahoo.com/gads?t=ms&k=Musical+instrument+drum&w1=Percussion+i nstruments&w2=Percussion+musical+instrument&w3=Musical+instrument+drum&w4=La tin+percussion+instrument&w5=Percussion+drum+set&w6=Dtxpress+iii&c=6&s=168&. sig=sYDXzjfCJLAOP_hPf1JTDQ> instrument drum Latin <http://groups.yahoo.com/gads?t=ms&k=Latin+percussion+instrument&w1=Percussi on+instruments&w2=Percussion+musical+instrument&w3=Musical+instrument+drum&w 4=Latin+percussion+instrument&w5=Percussion+drum+set&w6=Dtxpress+iii&c=6&s=1 68&.sig=c5ak20lC4xSZzRTLQJgdGA> percussion instrument Percussion <http://groups.yahoo.com/gads?t=ms&k=Percussion+drum+set&w1=Percussion+instr uments&w2=Percussion+musical+instrument&w3=Musical+instrument+drum&w4=Latin+ percussion+instrument&w5=Percussion+drum+set&w6=Dtxpress+iii&c=6&s=168&.sig= HCcR3jNdwEHeHLXI2Z50tQ> drum set Dtxpress <http://groups.yahoo.com/gads?t=ms&k=Dtxpress+iii&w1=Percussion+instruments& w2=Percussion+musical+instrument&w3=Musical+instrument+drum&w4=Latin+percuss ion+instrument&w5=Percussion+drum+set&w6=Dtxpress+iii&c=6&s=168&.sig=XjI1rvG l1L_yY_uV8TdlUQ> iii _____ YAHOO! GROUPS LINKS * Visit your group "DTXpress <http://groups.yahoo.com/group/DTXpress> " on the web. * To unsubscribe from this group, send an email to: DTXpress-unsubscribe@yahoogroups.com <mailto:DTXpress-unsubscribe@yahoogroups.com?subject=Unsubscribe> * Your use of Yahoo! Groups is subject to the Yahoo! <http://docs.yahoo.com/info/terms/> Terms of Service. _____