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[EPICURUS]

Originally posted by Flash@TMB:
We're now pretty much at the sound that we were aiming for when we installed this system. I'm really looking forward to the next gig.

surely thats all you needed to say? the rest is bloody gobbledegook to most folk im sure. who cares?!

[Bob Double Jack]

Originally posted by EPICURUS:
surely thats all you needed to say? the rest is bloody gobbledegook to most folk im sure. who cares?!

That is funny.

[Flash@TMB]

Originally posted by EPICURUS:
surely thats all you needed to say? the rest is bloody gobbledegook to most folk im sure. who cares?!

It is short sighted to assume, that out of the hundreds of people subscribing to a site called aberdeen-music, nobody has any interest in sound engineering.

Weirder still is that you keep reading and responding to my threads on this topic, albeit in a negative way. If you really like responding to boring technical stuff that you have trouble following, then this should be right up your street:

http://www.ytmag.com/cgi-bin/boards.cgi

[Cloud]

You're into antique tractors, Flash?

Well, I never

[Flash@TMB]

Originally posted by Cloud:
You're into antique tractors, Flash?

Well, I never

My idea of a good game of squash involves a bunch of neds in a confined space and me in a traction engine.

[Hogisbald]

Originally posted by Flash@TMB:
It is short sighted to assume, that out of the hundreds of people subscribing to a site called aberdeen-music, nobody has any interest in sound engineering.

Weirder still is that you keep reading and responding to my threads on this topic, albeit in a negative way. If you really like responding to boring technical stuff that you have trouble following, then this should be right up your street:

http://www.ytmag.com/cgi-bin/boards.cgi

Thats what I though! Surely Flash is allowed to chat about music related issues on a music related website?

[EPICURUS]

Originally posted by Flash@TMB:
If you really like responding to boring technical stuff that you have trouble following, then this should be right up your street:

http://www.ytmag.com/cgi-bin/boards.cgi

nah, your technical talk is still more boring than that!!

[Flash@TMB]

Well brace your masochistic little eyes for this lot then...

We've been having some problems with an ever changing selection of rogue frequencies in the bass and lower mid ranges. On Monday we carried out an accoustical analyses to find out what was causing them.

It was discovered that:

The bass bins were resonating through the floor. Different bass guitars were reasonating differently.

The face panel between the bins was acting as a second kick drum / bass resonator.

Both of those were resonating at 20-150Hz.

The face panels under the low mids were resonating between 160 and 350Hz.

We cured the 20-150Hz issues by ripping up part of the floor and placing the bass bins on 10mm accoustic mat layered with 10mm of neoprene. We then braced the centre panel to raise it's resonating frequency range and dampened it with accoustic matting.

There was not anough accoustic matting to deal with the face panels under the low mids, but I have ordered some more. We'll also brace these further so that they reasonate a little higher up.

This has tightened up the bottom end a lot. Listen to Duran Duran's Planet Earth on the jukebox to hear the difference. Prior to this treatment the bass on certain tracks was coming through far too loud.

The low mid reasonance is now more apparent but we'll deal with that real soon.

The quiet monitor has also been fixed... my fault, and I can remember this happening. I was adjusting the EQ on a tom tom, when MTA changed the active layer to master from the laptop - we didn't realise this would occur on the desk at the same time, so my tom tom suddenly became one of the monitors... and I wasn't paying enough attention and so wasn't sure what I'd twiddled. Ooops. So for 3 weeks the monitor has been quiet. Too quiet.

Once we get the resonance problems fixed we'll ring out the room again and maybe fire up the pink noise analyzer. I reckon all the wierd feedback issues will go away... not that they have been that apparent during the gigs as MTA has kept everything well under control. It's just makes our job a bit less fraught.

[Flash@TMB]

This worked beautifully. MTA and myself ran the spectrum analyser seven times and each time it came out showing the frequency response curve of our mic. In other words the spectrum is flat and the system is tonally perfect. The reason we ran it seven times was that MTA couldn't believe the result - not because it doesn't sound perfect, but because it's extremely impressive for a PA system to deliver a uniform frerquency response.

This Friday Nick Taylor and I are scheduled to install a second set of delay speakers (plus the corresponding amp) further back on the last ceiling beamto provide better downfill to the rear of the house. These speakers (and their amp) are exactly the same as the existing delay speakers so there should be no impact on the sonic performance. The existing delays will be angled down slightly more to provide better downfill to their immediate area.

The purpose of this is to reduce the overall volume required to drive sound clarity to the rear of house. This means that gigs will be at a lower volume but the sound should be much clearer at the back.

I've also raised the guitar cabs higher up, as this makes it easier for the players to hear their amp, and reduces the volume required to produce distortion, leaving the sound engineer with better control over the sound.

It's safe to say that we are now achieveing the sound that we were originally aiming for. I just didn't expect it to take this long to get there!

Phew. Signing off.

[MTA]

So the new delays going in today?? I cant wait to get out the studio and give them a go!
After all the acoustic treatment done It is the best sounding PA in Aberdeen no question...
See ya soon MTA...