D1 on 'Grand Piano Rx' Sound

paulgee · Post by **paulgee** » Thu Dec 06, 2007 10:45 am

The D2 on the 'Grand Piano RX' sound (at least I think it is D2, maybe D1), seems to play more loudly and more bassy than the other surrounding notes (C2, E2 etc.).

I really find it rather annoying. Has anyone else noticed this?

It appears to be the sound itself rather than the keybed, because playing a piano sound on the Fantom XR module is fine.

Best Regards
Paul.

paulgee · Post by **paulgee** » Thu Dec 06, 2007 9:45 pm

Actually it is D1, that causes the problem - and on the PA800.

I have been experimenting some more tonight and it is very strange, I do not hear it on the headphones or through an external speaker. But on the internal speakers it very noticeably has a lot more bass on this one note.

I tried again with an external sound module and a more mellow piano sound with more bottom end and I get exactly the same effect. It seems as if there must be some non-linearity in the frequency response of the internal amplifier or speakers, not only that but it must be a fairly sharp notch to only occur for the D1 note frequency.

To narrow down if this just my board or a common problem can somone else try this on their PA800. It is fairly easy to tell, just play the keyboard through the internal speakers with the Grand Piano eXp performance and see if the D1 sounds more bassy than the other notes around it. It would be very helpful if someone could report back.

Best Regards
Paul.

Rob Sherratt · Post by **Rob Sherratt** » Thu Dec 06, 2007 9:51 pm

I have the GrandTouchRX samples loaded on my Pa1x Pro and there is no resonance at any particular note that I can hear from the samples themselves. I'm using external monitors of course. So I think the effect you are hearing is probably a resonance in the built in speakers on the Pa800.

P.S. I also have another keyboard (Roland) with built in speakers and I get resonance effects in the A above middle C especially when playing piano samples in a small room.

Best regards,
Rob

paulgee · Post by **paulgee** » Fri Dec 07, 2007 11:12 am

Rob, thanks for your response.

After experimenting some more, I think as you say there is some resonance effect due to location, mounting, size of room etc. I am surprised it is such a sharp resonance around a small frequency range, but maybe I am just being oversensitive to it now that I have noticed it.

Best Regards
Paul.

keys · Post by **keys** » Fri Dec 07, 2007 7:28 pm

Hi Paul,
For what it's worth, it is not apparent on the PA2x, so it might just be something that has a sympathetic resonance in the room, there is a speaker grille on one particular box stored in my practice room that vibrates at A-0, particularly when playing manual bass.
Dennis

Rob Sherratt · Post by **Rob Sherratt** » Fri Dec 07, 2007 11:45 pm

Hi Paul,

Like you, I was surprised when this resonance started happening with my Roland stage piano (with built in speakers). It was very loud at just one note. I thought there was a fault initially. But when I moved the keyboard to another room the resonance went away. I guess it kinda makes sense that every room must have a number of frequencies at which it resonates.

Maybe you need to get yourself a new house

Best regards,
Rob