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Regular Open Mic Night / Jam Session


Flash@TMB

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We are going to fire up our new format Open Mic Night / Jam Session this Sunday from 7pm onwards.

The Hexagonal Pensioners will act as the new 'house band', they are there to kick the session off, and then fill in the blanks in any bands that turn up missing a player or two.

All bands are welome, but how many tunes they are permitted to play depends on crowd response...

This is early days for the new set-up, and hopefully everyone will help us make this a success.

BTW we are competing head on with the old school at Billy Bundys under the supervision of our 'ex house band'. They reckon that they are 'irreplacable' - let's prove them wrong! Lets demonstrate that people under 35 can participate in this type of event LOL! Let's operate a jam where nobody plays 'Black Night'... EVER...

Flash

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Getting There

Most of this weeks session was about sorting out the stage monitors. There were problems with low mid feedback, and a general muddiness. These were related to the configuration of the drum monitor. I think I've finally gotten to the bottom of this one, but it took a while...

By 10pm I'd sussed it out an killed the drum monitor as a temp fix. At that point things started to sound really good. Eliminating the feedback and muddiness enabled me to start EQing the sound properly. We also got a really good stage sound (with the exceptio of the drummer). Next week I'll try out a fix that should eliminate the problem altogether.

Thanks to all the participating musicians for their patience.

For those that have more than a passing interest, here are the boring technicalities in all their dreadful detail:

We have 6x300W powered wedges and a powered sub that run straight off the desk through 6 of the aux channels. One of the wedges daisy chains into the sub to provide a full range stack that acts as the drum monitor. I had assumed that there would be some sort of passive crossover in the sub for this application but if there is it toally sucks!

The purpose of the sub is to deliver the kick drum sound to the drummer. Because the kick drum sound travels away from the drummer, it is impossible for the drummer to hear the kick drum once the rest of the band fire up. We use a sub because it delivers the whooomp feeling to the drummers arse. In a manner of speaking. The sub itself can deliver a range of frequencies from sub base to low mid.

The problem had arisen due to the wedge being daisy chained into the sub. The sub and wedge were effectively acting as one big monitor, and apparently without a decent crossover to separate the frequencies. The meant the sub was delivering some of the low mid from the vocal - something it's not particularily good at reproducing. The result was feedback and a muddy effect through interaction with the vocal mics. It's not possible to EQ out the low mid from the sub without inadvertantly removing it's presence from the wedge also. The effected frequency band is really wide so the monito would sound well dodgy without it.

The solution is to split the sub and the wedge and send separate monitor feeds to them, just pushing a nicely compressed kick drum signal through the sub. I'm confident this will clear up this issue.

The minor downside is that with the sub using it's own aux channel I have to do away with one of the wedges, leaving 'only' 5 wedges, 2 at the front, 2 at the sides, and 1 at the back with the sub. We were previously using 3 at the front. This isn't too big a deal because there is lot's of headroom left on the monitors, the vocal was coming in at -10dB, and with the feedback eliminated we can start to crank the monitor mix a lot higher.

Flash

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Re: Getting There

Originally posted by Flash@TMB:

We have 6x300W powered wedges and a powered sub that run straight off the desk through 6 of the aux channels. One of the wedges daisy chains into the sub to provide a full range stack that acts as the drum monitor. I had assumed that there would be some sort of passive crossover in the sub for this application but if there is it toally sucks!

The purpose of the sub is to deliver the kick drum sound to the drummer. Because the kick drum sound travels away from the drummer, it is impossible for the drummer to hear the kick drum once the rest of the band fire up. We use a sub because it delivers the whooomp feeling to the drummers arse. In a manner of speaking. The sub itself can deliver a range of frequencies from sub base to low mid.

The problem had arisen due to the wedge being daisy chained into the sub. The sub and wedge were effectively acting as one big monitor, and apparently without a decent crossover to separate the frequencies. The meant the sub was delivering some of the low mid from the vocal - something it's not particularily good at reproducing. The result was feedback and a muddy effect through interaction with the vocal mics. It's not possible to EQ out the low mid from the sub without inadvertantly removing it's presence from the wedge also. The effected frequency band is really wide so the monito would sound well dodgy without it.

The solution is to split the sub and the wedge and send separate monitor feeds to them, just pushing a nicely compressed kick drum signal through the sub. I'm confident this will clear up this issue.

The minor downside is that with the sub using it's own aux channel I have to do away with one of the wedges, leaving 'only' 5 wedges, 2 at the front, 2 at the sides, and 1 at the back with the sub. We were previously using 3 at the front. This isn't too big a deal because there is lot's of headroom left on the monitors, the vocal was coming in at -10dB, and with the feedback eliminated we can start to crank the monitor mix a lot higher.

Flash

That's not gonna work, buy a crossover and feed the drum monitor signal through that before sending to your sub and wedge D/F amps.

The reason it won't work is because the kick drum doesn't just produce sub frequencies, there is also the 'click' to take into account. This high end definition of the kick is a very important part of the sound and provides the definition required for the drummer to hear rather than feel the individual beats, especially if there's some double pedal action happening there. The same applies to bass guitar which some drummers rely on as well.

If you're metering off your desk -10dBFS is already ouputting near to max (approx +4 dBu) so you don't have any headroom to play with.

300W seems a bit low for a wedge, I normally use about 600-650W wedges and frequently have to push them to the max

Tip: Try to keep what's in the monitor mixes to the minimum. on such a small stage with monitors coming in from the side as well you'll get a lot of spill on your mikes which affects the FOH sound as well. If only we could train mics to only pick up the sounds we wanted them to life would be so much easier.

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Re: Re: Getting There

Originally posted by soundian:

That's not gonna work, buy a crossover and feed the drum monitor signal through that before sending to your sub and wedge D/F amps.

The reason it won't work is because the kick drum doesn't just produce sub frequencies, there is also the 'click' to take into account. This high end definition of the kick is a very important part of the sound and provides the definition required for the drummer to hear rather than feel the individual beats, especially if there's some double pedal action happening there. The same applies to bass guitar which some drummers rely on as well.

If you're metering off your desk -10dBFS is already ouputting near to max (approx +4 dBu) so you don't have any headroom to play with.

300W seems a bit low for a wedge, I normally use about 600-650W wedges and frequently have to push them to the max

That's not the meter position of the monitor, it's where I have the monitor faders set.

Power is not a measure of volume. A 600W monitor is only in the order of 10% louder that a 300W monitor... assuming the impedance of both is the same. You need to multiply power by approx 10 in order to double the volume. An easier way to increase volume is by adding speakers. 5 wedges is quite a lot on a stage like ours. That's the equivalent of 5 powerful HiFi's, and stage monitors are very directional compared with HiFi.

I also like to compress the monitor sound as this enables me to drive them harder, and I find we get less issues with feedback that way. I'm not talking full on CD levels of compression, but just enough to keep the vocal in focus.

Also because the weges are powered, I can daisy chain 2 wedges together, and thus reinstate my 6th wedge at the front of the stage. It just means that 2 wedges will be outputing the same mix, quite often the case anyway.

Feedback from AKA The Fox was that it was the best stage sound they'd ever had, and they were playing without the benefit of a bass amp, so the reliance on monitor was higher than usual.

I have a spare crossover and I can try it that way, but alternatively I can send the kick drum signal separatley to both the sub and the wedge, and the use an HPF to eliminate the lower frequencies from the wedge. Also because the beater is on the front of the drum, some click sounds already makes it to the drummer unaugmented.

Flash

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Re: Re: Re: Getting There

Originally posted by Flash@TMB:

That's not the meter position of the monitor, it's where I have the monitor faders set.

^That doesn't mean you're ouputting -10, you could quite easily be outputting 0 dBu, dpends on your gain structure.

Power is not a measure of volume. A 600W monitor is only in the order of 10% louder that a 300W monitor... assuming the impedance of both is the same. You need to multiply power by approx 10 in order to double the volume. An easier way to increase volume is by adding speakers. 5 wedges is quite a lot on a stage like ours. That's the equivalent of 5 powerful HiFi's, and stage monitors are very directional compared with HiFi.

^ I know it's not a linear relationship, I'm basing it on my experience and not calculations. Using 300W (compensated for ohmage when I say this) monitors I often can't get enough volume for louder bands. 600W normally gives me just enough to deal with most things.

I also like to compress the monitor sound as this enables me to drive them harder, and I find we get less issues with feedback that way. I'm not talking full on CD levels of compression, but just enough to keep the vocal in focus.

^In theory compressing the monitor sound will mean an increased gain level for the same onstage volume, meaning feedback should occur at lower percieved volumes. I also try not to compress things in the monitors too much, some people need it free to control their dynamics.

Also because the weges are powered, I can daisy chain 2 wedges together, and thus reinstate my 6th wedge at the front of the stage. It just means that 2 wedges will be outputing the same mix, quite often the case anyway.

Feedback from AKA The Fox was that it was the best stage sound they'd ever had, and they were playing without the benefit of a bass amp, so the reliance on monitor was higher than usual.

^One bands meat is another bands poison.

I have a spare crossover and I can try it that way, but alternatively I can send the kick drum signal separatley to both the sub and the wedge, and the use an HPF to eliminate the lower frequencies from the wedge. Also because the beater is on the front of the drum, some click sounds already makes it to the drummer unaugmented.

^You'd also need a LPF on the sub feed to eliminate the wooly mids in the sub cab if you do it that way. Which is pretty much what a basic two way crossover is: a LPF and a HPF.

Flash

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Re: Re: Re: Re: Getting There

Originally posted by soundian:

That doesn't mean you're ouputting -10, you could quite easily be outputting 0 dBu, dpends on your gain structure.

The DM1000 enables the level to be adjusted at every stage, post EQ, post compressor, post gate, etc. It also enables EQ, gates, compressors to be inserted at any point in the chain, and in any order. This enables me to tightly control the level of the monitor signal to ensure that it is within tolerance. The other benefit is that these operations are all perfomed in the digital domain and don't add anything unintended to the sound. Now that I'm getting my head round it I'm enjoying this freedom.

Originally posted by soundian:

I know it's not a linear relationship, I'm basing it on my experience and not calculations. Using 300W (compensated for ohmage when I say this) monitors I often can't get enough volume for louder bands. 600W normally gives me just enough to deal with most things.

The Moorings stage is by it's nature a tightly controlled environment. We don't get much in the way of loose sound bouncing around. With the exception of the subwoofer it's extremely hard to generate feedback. A little sound goes a long way up there!

Speaker design and efficiency also comes into the equation. Not all 300W wedges perform the same.

Originally posted by soundian:

In theory compressing the monitor sound will mean an increased gain level for the same onstage volume, meaning feedback should occur at lower percieved volumes. I also try not to compress things in the monitors too much, some people need it free to control their dynamics.

This depends on the nature of the compression.

Because the DM1000 desk enables the level to be adjusted at each point in the chain, compression need not equate to an increase in gain.

The effect out front may be more pronounced than the person on stage realises. I think it's important to give them an onstage sound that correlates to what's happening out front. Squeezing everything a little can help achieve this. Like I said - we aren't talking CD levels of compression, just enough to keep their signals within the audible range on stage.

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Just to put this into perspective...

Just to put things into perspective we have approx 2400W of monitor through 7 speakers serving between 3 and 6 people in 16m2 of floor space. That's similar to the entire output of our last PA and it served 100 people in over 100m2 of floor space.

Please take into account that this is a lot of juice for someone like me who only has a 2" cock :O

Seriously.

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Re: Just to put this into perspective...

Originally posted by Flash@TMB:

Just to put things into perspective we have approx 2400W of monitor through 7 speakers serving between 3 and 6 people in 16m2 of floor space. That's similar to the entire output of our last PA and it served 100 people in over 100m2 of floor space.

Please take into account that this is a lot of juice for someone like me who only has a 2" cock :O

Seriously.

Your punters didn't have a lunatic drummer, a deaf bass player and two 4X12 cabs right next to their ears though.

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Re: Re: Just to put this into perspective...

Originally posted by soundian:

Your punters didn't have a lunatic drummer, a deaf bass player and two 4X12 cabs right next to their ears though.

I'm sure he'll have Karloff in at some point though... ;)

Or Bonesaw....? I know how much you loved them, Ian. The bass in particular.....!

:dunce:

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Re: Re: Re: Just to put this into perspective...

Originally posted by Rob Karloff:

I'm sure he'll have Karloff in at some point though... ;)

Or Bonesaw....? I know how much you loved them, Ian. The bass in particular.....!

:dunce:

Did I have a problem with the bass? That was so many gigs/bass problems ago I can't remember. Bonesaw are alright actually. Not my cup of tea but I can always appreciate a tight band who aren't dull as dishwater.

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Re: Re: Re: Re: Just to put this into perspective...

Originally posted by soundian:

Did I have a problem with the bass? That was so many gigs/bass problems ago I can't remember. Bonesaw are alright actually. Not my cup of tea but I can always appreciate a tight band who aren't dull as dishwater.

No, I don't think you did. It was a running thing that big Baz's bass used to make people feel quesy. I think your only gripe was singer Andy cupping the microphone.

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Re: Re: Re: Re: Re: Just to put this into perspective...

Originally posted by Rob Karloff:

No, I don't think you did. It was a running thing that big Baz's bass used to make people feel quesy. I think your only gripe was singer Andy cupping the microphone.

Cupping dynamic mics makes them omni-directional so not only does it sound awful, unless used occasionally for effect, but it picks up the monitors and feeds back much more readily.

Someone will explain to me some day why singers do it.

I'm not holding my breath though.

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that pisses me off too

Singers should learn how to use microphones. Do they really think that scientists and engineers put all those years into perfecting the dynamic response when all they had to do fast stick their fuckin hand over it. Doh!

And another thing. See in the Stone Roses video for Fools Gold. That thing that Ian Brown does with his mic... let me fill you all in on a little secret... he was MIMING for the video. See when some idiot actually does that on stage it sounds like they are flapping their hand over their mouth. Not good X-(

And another thing. Speaker stacks are no for leaning on while you sing. See mics in front of speakers is like smoking at a petrol pump. BOOM.

What's more, the floor of the stage is not your 'special mic stand'. And when you are finished singing there is no need to fold the boom down so the mic points outwards 4" off the ground. This is not good manners like something you do with your knife and fork when you clean your plate.

Hope some singer finds this information useful.

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We also now have our own guitars and drums:

http://www.aberdeen-music.com/forums/showthread.php?s=&threadid=11230

And I have the monitors properly EQ'd in now:

http://www.aberdeen-music.com/forums/showthread.php?s=&threadid=11231

So now musicians can come down on a Sunday night, chill out with a few drinks, get up on stage and play through our lovely rig, and not have to worry about carting any heavy and valuable equipment about.

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Oops, so there I was standing in one of Aberdeen's premier music stores, with two of their most experienced staff buying these guitars, stands, cases, and strings. Then I distinctly recall uttering the words "will I need anything else?". And them saying "no that should be everything.".

Which explains why I awoke in a cold sweat this morning 99% certain that guitar straps were omitted from this deal. Doh!

Luckily Laura has leant me one from one of her guitars... that still leaves me short of two.

So if you are coming along tonight, please bring your own guitar strap.

Having said that, I might get a pleasant surprise when I open the bags and find some straps tucked away.

BUGGER!

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  • 4 months later...

Well that was a fair old jam we got going last Sunday (5th Sept). This things really taken off... at last. I'm going to start using a notepad to keep track of who wants to go up. Either that or print out forms like:

Vocals. _______

Drums. _______

Guitar1 _______

Guitar2 _______

Bass.... _______

Keys.... _______

Tunes planning to play (if nothing in particular just state jam in whatever key).

And then wait till each form is filled out with at least 1 guitar, bass, and drums then enter it into the queue for some stage time.

Any other suggestions?

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  • 2 weeks later...

Wow another good one. I particularily enjoyed the guest appearances by Femora, Norman's Fettish, and No Quarter.

Femora have become much, much tighter than when I first saw them back in April. I was really impressed with their musicianship and the quality of theiur material. I hope they find a suitable vocalist real soon.

This was the first time I'd seen Norman's Fettish, and I was absolutely blown away. I hope they come back more often. I'm going to try and force a promoter to add them to a Saturday line up soon... hmm or maybe my next Saturday 5... now there's a thought!

No Quarter were also very impressive. Funny how the people that moan the absence of Led Zep on our jukebox are never around to witness stuf like this!

The rest of the jam also went very well, with perhaps the exception of Bob's live on stage and very public nervous breakdown/psychotic episode reminisant of The Wedding Singer.

Really looking forward to next week!!!

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