Plugin for phase corrections?

5 replies [Last post]
kungfoo
User offline. Last seen 5 years 30 weeks ago. Offline
Joined: 2006-07-04
Posts:

Is there a plugin that enables one to "rotate" the phase of a signal around? Such as to fix phase cancellations, if there is two tracks, say of a guitar, that were recorded with two microphones. Of course nothing goes over carefully adjusting microphone placement, but for the fine tuning such a plugin would be very useful.

paul
paul's picture
User offline. Last seen 1 day 15 hours ago. Offline
Joined: 2006-03-16
Posts:

if the phases are 180 degrees apart, then just right click on the track name in the mixer strip, and select "Reverse polarity".

for other more subtle phase variances, i don't have a suggestion.

kungfoo
User offline. Last seen 5 years 30 weeks ago. Offline
Joined: 2006-07-04
Posts:

No I meant for the more subtle changes. There are hardware devices who do that... (I think by applying flat eq, because that adds phase shift).

I'm a computer science student and very much interested in the whole plugin story, I might try to write such a plugin. Is there any guidelines that one MUST absolutely read?

sampo
User offline. Last seen 11 weeks 1 day ago. Offline
Joined: 2006-03-16
Posts:

Would a very slight delay or nudging the track by a few samples do the trick?

Matt Francomb
Matt Francomb's picture
User offline. Last seen 2 hours 28 min ago. Offline
Joined: 2006-09-12
Posts:

I'm working on one ATM. I've only tested it on kick and snare
within a drum-kit, but when it's necessary, it can bring the close-mic'd
source into much better focus with the overheads than a simple polarity-reverse will do.

I'm waiting on getting an official plugin ID allocated for it before
I can release.

I guess I could maybe try to put together an LV2 version, which AIUI wouldn't
need an official ID, but I've never done any LV2 stuff yet

calimerox
calimerox's picture
User offline. Last seen 13 hours 41 min ago. Offline
Joined: 2007-10-19
Posts:

usually for recording it also would do a line delay put in the effect channel (yes, with eq also the phases shift..) but for using that correctly u´d need to know the exact delaytimes, you need to "ping" your mics(or calculate distances....)... I ve neverdone it and only think of the commercial smart who can do that, but maybe theres an open source program who has the same feature...?