Topic: what´s the proper way to matrix a mono source with a stereo source?

[nicegrin]

Hi guys!

What´s the proper way of making a matrix from a mono source and a stereo source?

First making the mono double stereo and mix L/R with L/R of the stereo source?

Would be nice to hear some thoughts on this matter.

Thanks
N!


 

[cybergaloot]

That's what I'd do.

[acidjack]

Hi guys!

What´s the proper way of making a matrix from a mono source and a stereo source?

First making the mono double stereo and mix L/R with L/R of the stereo source?

Would be nice to hear some thoughts on this matter.

Thanks
N!

Yup, that is pretty much your option.  Usually comes out quite nicely, too, especially if the stereo has decent separation.

[tgakidis]

I usually take the mono source , double it and pan it left & right respectively.

[danlynch]

I usually take the mono source , double it and pan it left & right respectively.

That's what I do.  And rely heavily on the stereo source.    Usually its the mix of mono board feed with a stereo pair.    The board ends up just juicing up the vocals in the overall mix.

[cybergaloot]

I don't think panning a doubled mono source is going to make any difference but I also don't think it hurts. The only reason for doubling it is so that the audio editing program wont complain. Think of the mono source as a center mic.

[Patrick]

This is something that I've really been torn on.  I used to run lots of 3 mic mixes and they all sounded great, but I also realized thet if you're recording a stereo pa system... Having a center channel pulls all of the instruments into the "center," thus smearing the stereo image that was the original intent.  Especially since my center mic was almost always an omnidirectional mic.

Its even worse for sbds.  I used to record in a club that was running a stereo mix in the room, but could only offer a mono sbd feed.  All the time delay information that  my audience mics were recording was being destroyed by the center channel mono sbd feed.  Like I said, totally smearing the stereo image.

My opinion changes on this argument daily but in the end, I mix down what sounds best.  Sometimes it's ok to blend in a mono center channel, and other times it creates a multitude of problems.

[cybergaloot]

I guess I used to have a similar but opposite situation much of the time. I usually record at the same club and until about a year ago I was using a pair of mics at stage lip and pulling the mono soundboard but into two channels on my R-44. The mics were what gave me my stereo effect. I didn't notice too much in the way of instruments being pulled towards the center but I used the monitors as baffles for my mics, sort of like a really thick Jecklin Disk.

I've moved on to mixing my own multichannel to stereo on the fly. Certainly not something everyone wants to attempt since it requires a recording snake and a console.

[stantheman1976]

When I have the chance to record a SBD feed and mix it with stereo mics I like to take the SBD and mix it to a single channel in the middle and pan the stereo channels hard left and hard right. I like the effect it gives. Here's an example:
http://www.youtube.com/watch?v=2DDnTxfSiYA

I had my D50 set up about halfway back in the room and the soundboard was off to the right of the stage. I recorded from the board with an iRiver and used the internals on the D50. I was pleased with the way it turned out and the singer loved it.

[Gutbucket]

By ear.

This is something that I've really been torn on.  I used to run lots of 3 mic mixes and they all sounded great, but I also realized thet if you're recording a stereo pa system... Having a center channel pulls all of the instruments into the "center," thus smearing the stereo image that was the original intent.  Especially since my center mic was almost always an omnidirectional mic.

Its even worse for sbds.  I used to record in a club that was running a stereo mix in the room, but could only offer a mono sbd feed.  All the time delay information that  my audience mics were recording was being destroyed by the center channel mono sbd feed.  Like I said, totally smearing the stereo image.

My opinion changes on this argument daily but in the end, I mix down what sounds best.  Sometimes it's ok to blend in a mono center channel, and other times it creates a multitude of problems.

Try lower levels of mono center/SBD.  Start with just the stereo pair and pullup the center until it clarifies the timbre and solidifies the panoramic image appropriately.  Sometimes it's a pretty sensititve adjustement to get it sounding just right.  Doesn't really matter if you use the mono feed alone and pan it to center or duplicate the track and pan the two left/right, unless your software preferes one way other the other.  Also helps if your stereo feed is relatively 'wide' and not mostly mono to begin with.

[DSatz]

A lot depends on the actual signal levels of the mono feed and your stereo pickup. You always need to keep the actual level of the mono input distinctly lower than the level of the stereo inputs, or else you'll end up with a recording that sounds mono.

I come from the classical side of the recording business, where the rule of thumb for a 3-channel to stereo mix (given comparable levels in the three channels) is that the center channel should be set 4 - 6 dB below the left and right channels for starters, then "season to taste." (Many golden-era stereo classical recordings were made three-track and then mixed to two; sometimes there's an instrumental or vocal soloist on the center track; other times a "Decca Tree" microphone arrangement was used, with a central omni mike in addition to the main stereo left and right omnis.)

However, I would imagine that a soundboard feed and a two-mike pickup from out in the house would have arrival-time conflicts like crazy. So I would never mix the soundboard feed in to a two-channel recording directly--I'd record it onto a separate recorder track, and then see later on whether it really improves the mix or makes it worse or just makes it different. Along the way I might try delaying the soundboard mix by some number of milliseconds to compensate for my microphones being farther from the direct sound sources.

--best regards

[kisspep]

I think can be another option:

- All stereo source on left channel.
- all mono source on right channel.

Sometime it runs better than put mono on both channels with stereo one.

Thake a look at this matrix sample:

http://www.youtube.com/watch?v=HTFKC9-9gmg

Was done like this:

- Left Channel: Soundboard
- Right Channel: Zoom H2

To my taste this is better than both stereo audios.

Here is Zoom H2 one:

http://www.youtube.com/watch?v=_DVyT-rWhz4

... but of course, you must check what sound better with your audios.

I did same with Doro, and matrix ZS3/Zoom H2 audio:

http://www.youtube.com/watch?v=9ENB4Z1BgUg

To my taste it's better Zoom H2 alone:

http://www.youtube.com/watch?v=now9i2gzd3A
http://www.youtube.com/watch?v=iVrkwlFLZsw

But matrix audio it's still better than ZS3 alone.

And this is a matrix between stereo ZS3 and mono Kodak ZX1 in the middle:

http://www.youtube.com/watch?v=TSiFK4EXXDo

[acidjack]

^ Am I the only one who thinks this makes no sense whatsoever? 

not trying to be rude, but I have no idea why mixing all SBD in one channel and all AUD in the other would work.  Especially if not time synced.  The sample sounds completely bizarre.  It would be much better to blend both together on both channels.  Sorry.

[kisspep]

^ Am I the only one who thinks this makes no sense whatsoever? 

not trying to be rude, but I have no idea why mixing all SBD in one channel and all AUD in the other would work.  Especially if not time synced.  The sample sounds completely bizarre.  It would be much better to blend both together on both channels.  Sorry.

No Acidjack, you are not rude, it's your opinion, and maybe it have more sense than mine... I'm more or less new on this (with video mix about 3 years, but with audio work bout 6 months ago) in my ears it sounds much better than separated or both together on both channels... and for me is completely synced.

With opinions like your for sure I can get more knowledge about all this. More reviews are welcome, even bad reviews... that because I put those samples, I think comments by people on this forum are all important, and of course better than many "very good job!!!" if I'm doing shit. Here are Sony Vegas waves of both audios synced, with 3 different zoom in:

http://i254.photobucket.com/albums/hh97/pepito300/WAVESSBD-AUD.jpg

My eyes and my ears say are synced... maybe sound bizarre?.. not to my taste. Is there more I must check? or must I visit the doctor?.. please, more opinions.

All my respects to you, AcidJack, .... I can still read "Sitte suporter" "Taperssection All-Star" "Posts: 1979".

[adrianf74]

^ Am I the only one who thinks this makes no sense whatsoever? 

not trying to be rude, but I have no idea why mixing all SBD in one channel and all AUD in the other would work.  Especially if not time synced.  The sample sounds completely bizarre.  It would be much better to blend both together on both channels.  Sorry.

+1.  I agree. 

I still think the audience source should have a stronger weight than the board feed.  I've usually duplicated the mono feed to two channels and then synched both wav files based on samples to adjust for clock drift and then overlayed the two and played with the balanace before mixing down.  Usually find audience is around 60-70% and the board is the remainder (regardless of the board feed being stereo or mono).  Quite often, the PA system is in Mono so you're only getting spatial difference rather than a true stereo recording anyhow. 

Keeping the audio unmixed as the idea that was suggested is just plain whack.  Will sound like a nightmare.