Hi All,
I am trying to figure out if I am over-reacting or what?
The 2 "effects outs" feed a stereo reverb unit (balanced +4 in/out) which comes back through channels 7/8 on the recorder. So far, so normal...
What is driving me a bit batty is the low but noticeable hiss in the effects chain when 7/8 are brought up to unity gain.
I unplug "effects-in" cables on channels 7/8, no noise on the channels, so the channels are clean.
I turn down output from reverb unit, no difference, still low hiss at unity.
I re-cable reverb directly into the mic chain (ext mic pre/comp/reverb) and the chain is quiet on that channel.
I set the effect 1/2 feeds and the masters on my desired channels first to 127 each, then to 100. Same thing.
I do a factory re-set on the DP24SD to see if I have forgotten any feeds in an open position that might contaminate the effects chain...no difference.
The one set of controls that kill the hiss is the "digital gain" controls on channels 7/8. When I dial them down, the hiss goes down, but now I lose the level as well.
So, gain staging in some form appears to be off.
I am usually very comfortable with pro vs. consumer gain levels and what will match and what won't, except here it's as if there is something terribly obvious I am overlooking.
The reverb box gets +4 to keep it happy. Since the effects-outs on the DP24SD are TS, consumer-level line, I use a Radial J+4 Line Booster to re-balance the signal to XlR +4 going to the reverb. (The Radial has been tested as well, in and out of the line, and it, too, is clean)
The reverb signal comes back to channels 7/8 via XLR-to-TRS +4 line in, with the internal pre-amps on the '24 turned down all the way.
All should be happy, right?
The reverb signal is fine otherwise. At unity gain it rolls in on the meters in the sweet spot, equal to the outbound level of the track that is being fed to the effect. And yet, there is still the low hiss.
Thanks for reading, any suggestions?
C.
I am trying to figure out if I am over-reacting or what?
The 2 "effects outs" feed a stereo reverb unit (balanced +4 in/out) which comes back through channels 7/8 on the recorder. So far, so normal...
What is driving me a bit batty is the low but noticeable hiss in the effects chain when 7/8 are brought up to unity gain.
I unplug "effects-in" cables on channels 7/8, no noise on the channels, so the channels are clean.
I turn down output from reverb unit, no difference, still low hiss at unity.
I re-cable reverb directly into the mic chain (ext mic pre/comp/reverb) and the chain is quiet on that channel.
I set the effect 1/2 feeds and the masters on my desired channels first to 127 each, then to 100. Same thing.
I do a factory re-set on the DP24SD to see if I have forgotten any feeds in an open position that might contaminate the effects chain...no difference.
The one set of controls that kill the hiss is the "digital gain" controls on channels 7/8. When I dial them down, the hiss goes down, but now I lose the level as well.
So, gain staging in some form appears to be off.
I am usually very comfortable with pro vs. consumer gain levels and what will match and what won't, except here it's as if there is something terribly obvious I am overlooking.
The reverb box gets +4 to keep it happy. Since the effects-outs on the DP24SD are TS, consumer-level line, I use a Radial J+4 Line Booster to re-balance the signal to XlR +4 going to the reverb. (The Radial has been tested as well, in and out of the line, and it, too, is clean)
The reverb signal comes back to channels 7/8 via XLR-to-TRS +4 line in, with the internal pre-amps on the '24 turned down all the way.
All should be happy, right?
The reverb signal is fine otherwise. At unity gain it rolls in on the meters in the sweet spot, equal to the outbound level of the track that is being fed to the effect. And yet, there is still the low hiss.
Thanks for reading, any suggestions?
C.