| Author
|
Phase Alignment
|
Tomos
IsraTrance Full Member
Started Topics :
84
Posts :
981
Posted : Nov 23, 2009 01:53:16
|
I have just activated my 2 week demo of the UAD plugin - IBP phase alignment tool.
The video is a bit vague, in that it seems to be for fixing problems between poorly placed microphones recording a single source, such as a guitar. The sounds when played at the same time can lose punch or even a whole range of frequencies due to phase interactions.
There are a few plugins of this type that seem to adjust the starting position of the waveform. There has also been a bit of discussion regarding their usage on this forum.'d just like to get it clear in my head once and for all.
I'm just going to ramble with a stream of consciousness with what I think is correct. Afterwards, please tear it to shreds, correct me and then recommend whether this plugin is worth the purchase.
Okay - every waveform has a beginning and and end - where the wave starts (in real terms, whether the speaker cone is about to be pushed out, or pulled in) is measured in degrees.
In most cases it doesn't matter where the wave starts, mostly everybody can't tell the difference.
In Pstrance, sampling the bass helps to keep it tight as every note starts at the same phase and helps prevent a sort of 'phased' moving-up-and-down effect. Therefore popular VSTs for Psy-bass are those that have an init knob, or allow free-running to be turned off - of are completely sample based, like Tilogy, and always start on the same phase.
So anyway, 2 different sounds can interact to produce quite a different result if the starting phase of one of the sounds is adjusted. Not only when the sounds play at the same time, but also when they play one after the other. For example, kick then bass.
The way I envisage this is that the speaker cone may be moving in just as one sounds finishes, and the next wants to push it out.
A tightness can be achieved by adjusting the phase of one of the sounds so that they interact better, either at the tail end or when they overlap and cause phase attenuation or boosts.
---
Questions:
Am I even close with this basic description.
Is the UAD IBP phase alignment plugin useful for all situations?
Are these types of plugins worth using constantly to try on every sound in the mix to help prevent phase issues? |
|
|
Co-codamol
Inactive User
Started Topics :
0
Posts :
69
Posted : Nov 23, 2009 02:23
|
1) probably yes
2) probably no
3) probably no |
|
|
|
mquirk1
IsraTrance Full Member
Started Topics :
63
Posts :
384
Posted : Nov 23, 2009 02:51
|
it's a great plug for when checking your mix in mono and finding some nasty phase problems. it's also a good tool to widen mixes if used in the right way
therefore yes to all 3 of your qs |
|
|
|
jizy
IsraTrance Full Member
Started Topics :
90
Posts :
1493
Posted : Nov 23, 2009 17:19
|
Just make sure a percentage is mono? Bx control I use .
Or are u talking about a different phase?
|
|
|
|
Munty munt munt
Inactive User
Started Topics :
0
Posts :
21
Posted : Nov 23, 2009 19:00
|
|
3-1 rule for mics on same source. |
|
|
|
Colin OOOD
Moderator
Started Topics :
95
Posts :
5380
Posted : Nov 23, 2009 19:13
|
|
Munty munt munt
Inactive User
Started Topics :
0
Posts :
21
Posted : Nov 23, 2009 19:18
|
|
The 3:1 distance rule is a general rule of thumb for close miking. To prevent phase anomalies and leakage, the instruments should be placed at least three times as far as the distance between the instrument and the microphone. You can also use the phase reversal on the mixer/console and then there's nudging the audio in your DAW. Protools handles this very well but I am sure other DAWs can manage it. |
|
|
|
Colin OOOD
Moderator
Started Topics :
95
Posts :
5380
Posted : Nov 23, 2009 19:21
|
|
Munty munt munt
Inactive User
Started Topics :
0
Posts :
21
Posted : Nov 23, 2009 19:29
|
|
Tomos
IsraTrance Full Member
Started Topics :
84
Posts :
981
Posted : Nov 23, 2009 20:06
|
I know I probably wasn't very clear, all that waffle just kinda fell out onto the page - I'm not talking about microphones. I only mentioned them as an example of what these correction plugins do.
My question is whether these plugins are worth it on regular synths and samples, in roughly the same frequency range, playin at the same time.
"it's a great plug for when checking your mix in mono and finding some nasty phase problems."
Please explain... |
|
|
|
PoM
IsraTrance Full Member
Started Topics :
162
Posts :
8087
Posted : Nov 23, 2009 20:30
|
|
maybe it can be usefull when you delay the left and right to get a wide stereo sound using different phase shift on every chanels |
|
|
|
Pointless
Inactive User
Started Topics :
0
Posts :
49
Posted : Nov 29, 2009 15:43
|
Quote:
|
On 2009-11-23 20:06, Tomos wrote:
I know I probably wasn't very clear, all that waffle just kinda fell out onto the page - I'm not talking about microphones. I only mentioned them as an example of what these correction plugins do.
My question is whether these plugins are worth it on regular synths and samples, in roughly the same frequency range, playin at the same time.
"it's a great plug for when checking your mix in mono and finding some nasty phase problems."
Please explain...
|
|
You could always check the mix with your ears in mono mode |
|
|
|
What is the 3-1 rule?
