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One note louder than the others

PostPosted: Sun Apr 18, 2010 7:53 pm
by b.natural
The lowest B on my keyboard tends to sound louder than its neighbours. This happens with most sample sets. I have small KRKs and the subwoofer with the low-pass frequency set to 130 db. I tried setting this lower, but it didn't change much. Any ideas as to what's happening?

I now know I should have taken that course on the physics of sound during my B.Mus. Hindsight...

Michael

Re: One note louder than the others

PostPosted: Sun Apr 18, 2010 8:47 pm
by RoyKnight
Michael,

In my room I have a resonance on low A, regardless of the sample set. I have used Hauptwerk voicing to decrease the amplitude for low A on 16' and lower stops. That's the beauty of Hauptwerk.

Roy

Re: One note louder than the others

PostPosted: Mon Apr 19, 2010 3:49 am
by gingercat
My room also resonates on low B/ low A# but a quick (well, not always that quick!) tweak in the voicing screens soon cures it. It'd be nice if we could create a "room" voicing that could be applied to all sets. Obviously it would be something of an inexact science as not all sets are equal, but would give us a faster starting point for fine tuning.

Re: One note louder than the others

PostPosted: Mon Apr 19, 2010 8:35 am
by BarryG
Almost certainly a "standing wave". Mine are at about 80 Hz, plus multiples on some ranks. You can compute the wavelength and it will probably be closely correlated with your room dimensions. I use the voicing feature to mitigate them, usually lowering loudness, then increasing brightness. Large dB changes are sometimes required. Would be unable to play some ranks without this feature! It's interesting that it varies from rank-to-rank, a much bigger resonance with some flues than with most reeds.

Barry

Re: One note louder than the others

PostPosted: Mon Apr 19, 2010 9:06 am
by b.natural
I will adjust the 16-foot stops and the manual 8 principals first and see if that is enough. These tweaks could take some time. Initially, I thought it was just a voicing issue on the Moseley organ, but discovered a trend with the other instruments.

My thanks again, folks. You always know what to say! :D

Michael