I've had this link for quite a while, and about once a month take a look at it. It's very educational and can provide some insight for fine tuning your keyboards and sound systems. Take a look at http://www.independentrecording.net/irn/resources/freqchart/main_display.htm

Almost forgot the second link: http://www.recordingwebsite.com/articles/eqfreq.php

Enjoy,

Gary

[This message has been edited by travlin'easy (edited 08-16-2010).]

Thanks much for those links, Gary. I just brought my s910 in the house and was going to do some EQing of the piano and the board proper. This will help tremendously.

Thanks friend for share this interesting link.
Chico