Recording issue
in [Live Sound]
|
From: Getting Older and Grumpier Gear Minion on 5 Jan 2010 16:43 On Jan 4, 11:35 pm, "Tim Perry" <timpe...(a)donespameroadrunner.com> wrote: > "Phildo" <P...(a)phildo.net> wrote in message > > news:hhtol2$lpf$1(a)news.eternal-september.org... > > > > > "Michael Dobony" <sur...(a)stopassaultnow.net> wrote in message > >news:nwikt68n6d0w.8efffljt78w8$.dlg(a)40tude.net... > >> We record directly to a Marantz CD recorder from Group 1 on a wye > >> cable to the stereo inputs on the CD player > > > And there is your problem. > > > Basic sound 101. Amazing that someone who claims to know as much about > > sound as you do could make such a simple error. > > > Phildo > > Um phil... most line outs have a series resistor of some value or other > making resistive summing practical with a simple wye cable. I don't think > this is what he is doing here...sounds like subgroup one to a wye to both > record inputs. I'm wondering if the subgroup is balanced out and his recorder is unbalanced. thus needing a proper cable to keep order in the signal chain.not to mention the possibility of overdriving the recorder input,even though meters do not indicate it. What's the actual voltage going to the CD recorder, and is that within the device spec.? It's old school but you have to start at the first output.
From: Rupert on 5 Jan 2010 19:17 On Jan 5, 1:43 pm, Getting Older and Grumpier Gear Minion <westpase- he...(a)hotmail.com> wrote: > On Jan 4, 11:35 pm, "Tim Perry" <timpe...(a)donespameroadrunner.com> > wrote: > > > > > > > "Phildo" <P...(a)phildo.net> wrote in message > > >news:hhtol2$lpf$1(a)news.eternal-september.org... > > > > "Michael Dobony" <sur...(a)stopassaultnow.net> wrote in message > > >news:nwikt68n6d0w.8efffljt78w8$.dlg(a)40tude.net... > > >> We record directly to a Marantz CD recorder from Group 1 on a wye > > >> cable to the stereo inputs on the CD player > > > > And there is your problem. > > > > Basic sound 101. Amazing that someone who claims to know as much about > > > sound as you do could make such a simple error. > > > > Phildo > > > Um phil... most line outs have a series resistor of some value or other > > making resistive summing practical with a simple wye cable. I don't think > > this is what he is doing here...sounds like subgroup one to a wye to both > > record inputs. > > I'm wondering if the subgroup is balanced out and his recorder > is unbalanced. thus needing a proper cable to keep order in > the signal chain.not to mention the possibility of overdriving the > recorder input,even though meters do not indicate it. > What's the actual voltage going to the CD recorder, > and is that within the device spec.? > It's old school but you have to start at the > first output. You bring up a good point. Depending on the output topology of the subgroup, it may not like being driven "single ended" into an unbalanced load. Mike, what type of inputs does the CD recorder have and how is the wye cable wired? What is the model of the mixer? The other thing I was thinking is that the output of the group is balanced and the wye cable is wired so that it's separating hot & cold plus shield to unbalanced lines which would yield flipped polarity of left with respect to right at the CD inputs. During playback that could be a problem, especially if the CD's outputs are mixed to mono. Rupert
From: Phil Allison on 5 Jan 2010 19:46 "Rupert" You bring up a good point. Depending on the output topology of the subgroup, it may not like being driven "single ended" into an unbalanced load. Mike, what type of inputs does the CD recorder have and how is the wye cable wired? ** Being one of Dopney's leads - it will have all signal and ground pins reversed for a start... .... Phil
From: liquidator on 6 Jan 2010 15:49 "Phil Allison" <phil_a(a)tpg.com.au> wrote in message news:7qi4qmFi2U1(a)mid.individual.net... > > "Rupert" > > > You bring up a good point. Depending on the output topology of the > subgroup, it may not like being driven "single ended" into an > unbalanced load. Mike, what type of inputs does the CD recorder have > and how is the wye cable wired? > > > ** Being one of Dopney's leads - > > it will have all signal and ground pins reversed for a start... > > > > ... Phil > > > Perhaps a diode wired in to make sure no DC?
From: Rupert on 6 Jan 2010 16:55
On Jan 6, 12:49 pm, "liquidator" <mi...(a)mad.scientist.com> wrote: > "Phil Allison" <phi...(a)tpg.com.au> wrote in message > > news:7qi4qmFi2U1(a)mid.individual.net... > > > > > > > > > "Rupert" > > > You bring up a good point. Depending on the output topology of the > > subgroup, it may not like being driven "single ended" into an > > unbalanced load. Mike, what type of inputs does the CD recorder have > > and how is the wye cable wired? > > > ** Being one of Dopney's leads - > > > it will have all signal and ground pins reversed for a start... > > > ... Phil > > Perhaps a diode wired in to make sure no DC? Wouldn't a blocking cap be more appropriate for DC blocking? |