Question re: Bridge Pins

Ron Overs sec@overspianos.com.au
Sun, 8 Dec 2002 19:45:49 +1100


Ric B wrote:

>.... seems to me tho...that if you
>could avoid the side bearing whilst maintaining the solid contact on the
>bridge.....

Wayne Stuart carries on about the negative effects of side bearing 
effecting the tone. But I don't believe it.

>I've always wondered about that.  I would presume the slant of the bridge
>pins and the severe angle of the string between pins is intended to keep the
>string pressed firmly to the top surface of the bridge, but wouldn't the
>downbearing already achieve that?

Not sufficiently, some offset angle, whether it be horizontal or 
vertical, is necessary to prevent falseness. I know this first hand 
because I have built a bridge with insufficient side draft angle, 
through a spreadsheet formula error. The tone was a disaster until 
the bridge was recapped. Of course an alternative engineering 
solution could be employed, but it wouldn't be as cheap.

>What would happen if a string were passed straight over the bridge without
>pins, like on a violin?  What would happen?  How would it sound?

Very ordinary. While this area of string termination warrants further 
study, some offset or an alternative solid termination is necessary 
for clean tone.

By the way list folks, does anybody have an email address for 
John-Paul Williams, who teaches piano technology at the London City 
and Guilds piano technology course. I would like to contact him.

Ron O.
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