Posted: Sun Mar 08, 2009 9:44 pm Post subject:
dub-style feedback loops
i'm using a few digital delays and other fx with a mackie mixer for outboard processing/routing and i noticed something a little aggravating.
i set up a feedback loop where aux 1 goes to delay- delay comes back to channel 16...and then turning up aux 1 on channel 16 to get some feedback going...but it seems that when i do this, my feedback sounds horrible and phasy.
is this because i'm using digital delays and the time it takes the processor to pass the audio creates phasing, or am i not doing something correctly? _________________ http://www.myspace.com/skaneskaneskane
Joined: Jun 21, 2008 Posts: 31 Location: mountains
Posted: Mon Mar 09, 2009 4:30 am Post subject:
if you have a dry/wet control on the delay you have to make sure that its 100% wet, so nothing of the original signal appears in the feedback loop. otherwise you will get phasing an nasty resonance.
Joined: Mar 07, 2007 Posts: 4579 Location: London, UK
Audio files: 172
Posted: Fri Mar 13, 2009 11:08 am Post subject:
Hi
Couple of questions. Which Mackie are you using. Which delay(s) are you using.
It is usually not considered good practice to use the mixer's aux sends to make feedback to outboard gear. If you're sending aux1 to the outboard device and bringing the fx return back in on a channel, that's fine, but if the aux1 send on that channel is post-eq you'd definitely be introducing some very small phase delay which will give you comb filtering. If it's a digital mixer then you'd be propogating and that's got similar problems.
Does the device not have its own, internal feedback? _________________ Garret: It's so retro.
EGM: What does retro mean to you?
Parker: Like, old and outdated. Home,My Studio,and another view
I'm using a 1642vlz and for simplicity's sake-a TC D-two delay.
my returns ARE coming back into a stereo channel. I'm not sure if the sends are post eq, but i would assume they would be pre eq.
The D-two does have (wonderful) feedback control, but im just trying to explore some mixing techniques and am running into problems. its very much possible that i am misunderstanding the concept of the feedback loop and it's application. _________________ http://www.myspace.com/skaneskaneskane
Joined: Mar 07, 2007 Posts: 4579 Location: London, UK
Audio files: 172
Posted: Sat Mar 14, 2009 6:48 am Post subject:
For many years I did dub style feedback on a Deltalab Effectron ADM1024, that has a +- feedback control. Using a Mackie CR1604 too. Those were the days. Between delay factor, feedback and judicious sending of signal, much fun was had. Again, using the onboard feedback prevents such issues with signal quality. _________________ Garret: It's so retro.
EGM: What does retro mean to you?
Parker: Like, old and outdated. Home,My Studio,and another view
if you are using a digital delay that samples the audio and repeats the samples [unlike analog].... that could explain the phasing........... _________________ Spiral Recordings
I'm using a 1642vlz and for simplicity's sake-a TC D-two delay.
my returns ARE coming back into a stereo channel. I'm not sure if the sends are post eq, but i would assume they would be pre eq.
The D-two does have (wonderful) feedback control, but im just trying to explore some mixing techniques and am running into problems. its very much possible that i am misunderstanding the concept of the feedback loop and it's application.
Well def make sure that the feedback on the unit is 0% (not sure if this was already implied). If possible, use a tape machine in your signal chain, even a cassette deck. By having space between the record and play heads, this delays the delay a bit and also gives the nice tape degeneration sound. Check this video:
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