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 Post subject: Piggyback Mixers?
PostPosted: Thu Jan 14, 2010 12:30 pm 
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Since you all have been so helpful concerning my audio chain question regarding compression, I thought I’d ask another concerning the simultaneous use of multiple mixers.

I seem to remember reading somewhere, directions on how to piggyback two mixers to effectively increase the number of available channels. I even attempted such a feat four years ago at a Relay-For-Life without success. I seem to remember the instructions to say that I was to connect “Tape Out” of the first board to the “Tape In” of the second. I did so, but I wasn’t able to get a main output.

I was under a bit of a time restriction so I didn’t have much time to t-shoot my switch positions and connections. After the relay I never thought to pursue it again; until now that is.

I have promised to help a friend and his new band with PA support for a fund raiser. Problem is I don’t know if I’ll have enough channels on just one mixer. So here I am again pondering the possibilities.

Does this seem feasible to anyone? If so, do you have any connection guidance other than what I’ve already mentioned?

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 Post subject: Re: Piggyback Mixers?
PostPosted: Thu Jan 14, 2010 12:40 pm 
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I've had to do this on a few rare cases. The easiest way would be to take the 1/4" main outs from the first mixer (assuming it has them) and connect it to a stereo input channel on the second mixer. I'd prefer this to the tape in because most of the time the tape in's only level control is a rotary knob. Additionally on many mixers the tape in cannot be sent to all of the aux sends (sometimes not to any of them). So having it on a channel strip allows you to send the channels mix from the first console to the aux sends.

If you don't have 1/4" outs or a stereo input, then you could use the XLR outputs from one and run them to two mic input channels on the second that panned left and right appropriately. You still get all the other advantages listed above.

If you have to go from the 1/4" output of one to the XLR inputs of the other, I'd recommend using a good stereo D/I for that.

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 Post subject: Re: Piggyback Mixers?
PostPosted: Thu Jan 14, 2010 10:07 pm 
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jr2423 @ Thu Jan 14, 2010 3:30 pm wrote:
Does this seem feasible to anyone? If so, do you have any connection guidance other than what I’ve already mentioned?

Yes, you should really consider renting / borrowing a mixer with enough inputs for the entire band. The reason is stage monitors.

Let's say the band has 12 inputs (pretty typical 4-piece group with a mid-size drum kit and no overheads) and they ask for 2 monitor mixes, one for the drummer and other backup singers, and a dedicated mix for the lead singer.

If you have two 8 channel mixers, you can probably put all the drums and guitars on one mixer, then all the vocals on another, but you also have to use up 4 channels on the "main mixer" to get the signals from the 2 monitor mixes, and left/right stereo, coming from the "sub-mixer." So you thought you had 16 inputs, when really you have been reduced to 16 inputs minus 4 bus links between the consoles, for 12 useful inputs.

Now if you add more monitor mixes, an outboard FX device, or anything like that, you can see how it quickly becomes smart to just rent a bigger one.

Another thing is, live sound is very different from karaoke. You might ask your friend's band if they know another musician who has live sound experience and can help you during the gig if you need it.

There are many more microphones, and the stage volume is not in your control as it is with karaoke; so it can be much more challenging to manage feedback. Also, if the musicians are asking for adjustments to their monitors, it takes some time to learn how to give everyone what they need (as a group) rather than one guy what he wants, while causing him to over-power everyone else in the monitors, and then the other guys can't hear themselves sing, or they turn their guitars up louder, etc. Mixing monitors for a band can be tougher than mixing for the PA, especially if you have never done it before.

I have been working with a novice "sound engineer" for a few months with my live gigs. He is a good sound guy and very good at talking with the musicians, and he gets a good PA mix quickly, and is great with FX.

However, he sucks at monitors. He used to trash one mix when he really meant to adjust a different one, cause feedback, and in general, did not understand what the musicians would need, so they would have to spend 5 minutes telling him "more this" "less that" before they could play a song.

The reason why is he never worked jobs where he really had more than 1 monitor mix to deal with, so he became really good at mixing for the audience, but he never learned how to do monitors.

It took about 10 gigs with understanding musicians to work most of these things out. Now his main issue is he won't refuse to turn something up whenever they ask, so for example, last week we smoked a wedge because he let the musicians bully him into running it way too hot, even though I warned him it was going to blow. They didn't need that much volume, they needed to be told "it's as loud as it's going to get, so get a drummer that knows how to control his stage volume." FYI they did have a very good drummer who can control his volume, he just didn't care because no one forced him to.

So as you can see, there is a LOT more going on at a live band gig, than with karaoke. It is very fun and I encourage you to do it, but don't be afraid to ask for help. Also, don't be afraid to tell the band you need them to rent a piece of equipment you don't own, etc.

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 Post subject: Re: Piggyback Mixers?
PostPosted: Fri Jan 15, 2010 7:06 am 
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jeffsw6 @ Thu Jan 14, 2010 11:07 pm wrote:
jr2423 @ Thu Jan 14, 2010 3:30 pm wrote:
Does this seem feasible to anyone? If so, do you have any connection guidance other than what I’ve already mentioned?

Yes, you should really consider renting / borrowing a mixer with enough inputs for the entire band. The reason is stage monitors...
...So as you can see, there is a LOT more going on at a live band gig, than with karaoke. It is very fun and I encourage you to do it, but don't be afraid to ask for help. Also, don't be afraid to tell the band you need them to rent a piece of equipment you don't own, etc.


You make some very good points; not the least of which is the monitor situation. I too was curious as to what I was going to do about that. I’m going to meet with the group at their next practice and I think I’ll suggest another practice solely for the purpose of sound experimentation. I really think I need to take the time to do a full set-up with them to ensure all concerned know what to expect.

Regardless whether this is a (no-pay) fund raiser, we should give the best we are capable of.

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 Post subject: Re: Piggyback Mixers?
PostPosted: Fri Jan 15, 2010 7:07 am 
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Sorry! I somehow double posted... :roll:

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 Post subject: Re: Piggyback Mixers?
PostPosted: Fri Jan 15, 2010 8:27 am 
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jeffsw6 @ Fri Jan 15, 2010 12:07 am wrote:
I have been working with a novice "sound engineer" for a few months with my live gigs. He is a good sound guy and very good at talking with the musicians, and he gets a good PA mix quickly, and is great with FX.

However, he sucks at monitors. He used to trash one mix when he really meant to adjust a different one, cause feedback, and in general, did not understand what the musicians would need, so they would have to spend 5 minutes telling him "more this" "less that" before they could play a song.


Woohoo further illustration of the value of a skilled monitor engineer. There's a reason the big boys use them!! This is something I've seen displayed over and over again, a good monitor engineer is not necessary a good FOH engineer and vice versa. I do know a few guys who kick butt in both roles, but they aren't all that common.

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 Post subject: Re: Piggyback Mixers?
PostPosted: Fri Jan 15, 2010 10:00 am 
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Occasionally I open my mixer section to guests. (I gave up on joiners or contributors, however I have had thousands of readers and this forum is ranked on Google and receives 10-20 hits per day) Watch the videos. Piggybacking is essentialy the same as sub assignment. As one can tell from the videos understanding mixers is just becoming familar wih each section ..Enjoy...

The Mackie links are obsolete However here is the complete manual download

mackman.zip

mixers

EDIT: These are the best videos for an understanding the mixer process..

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 Post subject: Re: Piggyback Mixers?
PostPosted: Fri Jan 15, 2010 1:18 pm 
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letitrip @ Fri Jan 15, 2010 11:27 am wrote:
Woohoo further illustration of the value of a skilled monitor engineer. There's a reason the big boys use them!!

I actually like doing monitors more than FoH, but it is definitely a hard thing to teach, especially to people who do not understand the value of headphones.

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