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stereo?
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MJ12
Started Topics :
9
Posts :
71
Posted : Mar 8, 2012 15:20:03
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Hi guys, Been lurking for a while, thought I would ask a few questions with some stuff that's been bugging me.
Kinda confused with regard to stereo, it's just the same sound coming out of both speakers right? But isn't that what mono does as well. Or if you pan a sound to the left then to the right in mono that's stereo too?
Might be looking at it all wrong, so if any one could enlighten me on a noobs question would be much appreciated
Cheers
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PoM
IsraTrance Full Member
Started Topics :
162
Posts :
8087
Posted : Mar 8, 2012 15:39
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mono what come out of the 2 speakers is the same signal, with pan you attenuate the volume of one side more or less.
paned center it sound in the middle/center while stereo sounds don t.
stereo sound what come out of the 2 speakers is not identical, that what give the impression it s spreaded, the difference between left and right chanel.
usual trick for example, to make a mono sound stereo it to add a small delay to one side, it will make a mono sound stereo as the 2 chanel are no more identical but delayed, maybe try this it could hep to understand |
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MJ12
Started Topics :
9
Posts :
71
Posted : Mar 8, 2012 16:10
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Ok that makes sense if sound is slightly different. so if I had two mono tracks with small variants in sound and panned hard left and right that would be the same as stereo?
I read somewhere that club rigs are not always stereo systems, so a track with lots of stereo will not come across well. Do most producers do two separate mixes, one in stereo and another in mono if they know they will be performing on a mono sound system.
Cheers
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orgytime
IsraTrance Full Member
Started Topics :
120
Posts :
1703
Posted : Mar 8, 2012 16:43
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Quote:
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On 2012-03-08 16:10, MJ12 wrote:
Ok that makes sense if sound is slightly different. so if I had two mono tracks with small variants in sound and panned hard left and right that would be the same as stereo?
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yes, try that, and youll get something like a chorus effect.
 www.soundcloud.com/orgytime |
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loki
IsraTrance Junior Member
Started Topics :
49
Posts :
429
Posted : Mar 8, 2012 17:25
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No, most producers don't do 2 separate mixes. Just make sure your mix works well in mono, too. I usually work with my sub-bass (below 150hz or so) in mono, as frequencies below 200hz or so can't be identified directionally anyways.
Generally, if the sub bass works out, you shouldn't have too many problems. Just watch out for "phase issues" - where the left channel is anti-phase of the right channel. Plugins such as stereo spreaders can be useful for increasing the wideness of your tune in stereo, but use them sparingly and with care - otherwise, when the channels are summed as mono, the sound might disappear entirely. Google "antiphase music" and you'll probably get some more info, or youtube it for an example.
Fun trick - vocals on recorded tunes are usually in mono to make them hit front and centre. To isolate vocals (or remove them), use a utility plugin to invert the phase of the left or right channel (the vocals will usually just disappear, along with the kick drum, perhaps the bass, and some guitars). You are now hearing ONLY what is in stereo, i.e. what was originally different between left and right. You can bounce this, invert its phase, and play it alongside the original track to isolate JUST the vocals (and probably bass and kick, too).
Try playing around with your final mix by listening to it in mono and seeing if any sounds disappear. You'll usually find some plugins with "widening" or "spread" of some sort as the source of the problem. Just decrease the amount, or the sample delay between the two channels, etc, and then try it in mono again.
Good luck!
Dance, even if you have nowhere to do it but your living room. ~Kurt Vonnegut
www.soundcloud.com/mixyott |
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Equilizyme
IsraTrance Junior Member
Started Topics :
19
Posts :
593
Posted : Mar 8, 2012 19:48
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MJ12
Started Topics :
9
Posts :
71
Posted : Mar 8, 2012 20:47
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Thanks guys, that older topic helped out loads too.
Wish I could try all this stuff out, but my mac has died ( G5 so pretty old ) will wait until the 2012 mbp comes out before I look at getting a new one.
Until then it's just the theory
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APriest
Started Topics :
2
Posts :
98
Posted : Mar 18, 2012 13:19
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In digital your stereo signal is made of 2 streams of numbers, 2 streams of 44100 numbers per second (if your sample rate is 44100).
For each of your 44100 numbers per second you can calculate it's MID and SIDE parts.
MID = (L + R) / 2
SIDE = (L - R) / 2
That's how MID/SIDE encoders works.
If the same sound is coming out of both speakers then your sound is mono because the side part is 0.
LEFT = MID + SIDE
RIGHT = MID - SIDE
That's how MID/SIDE decoders works.
That's how stereo meters and correlation meters should calculate the stereo width (and the phase cancelation) but IMO they doesn't works as expected (Stereoscope by BlueCat, Flux StereoTool and others.... my stereo meter works as i expected  but it's primitive).
I say that they don't work as expected because they don't change their calculations if you pan a sound, the result is the same for those analyzers, a mono sound panned IMO is stereo because (L-R)/2 isn't zero.... IMO.... well, that's not IMO, a mono sound panned is stereo for sure.
www.thepriest.site11.com - Freeware plugins |
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APriest
Started Topics :
2
Posts :
98
Posted : Mar 18, 2012 13:53
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Ops, my mistake, i mixed "Phase meters" and "stereo meters", i smoke too much and i drink too much rum.
www.thepriest.site11.com - Freeware plugins |
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