Yahoo Groups archive

Disklavier

Index last updated: 2026-04-28 23:20 UTC

Message

Hammer Sensors!

2004-02-08 by Leigh Whitley

Hi All
And G'day Peter, haven't seen you for awhile!
Peter wrote:-I would have thought the hammer sensor position would also affect
recordings. I'm most interested to hear the views of others on this. I
realise that hammer sensors are only fitted to some instruments, so perhaps
they don't contribute to recording, just
reproduction.

On that instrument of yours Peter, the only velocity sensors are the hammer sensors, the key sensors only provide key "on" and key "off" information.
The hammer sensors are essential for recording to provide the velocity information and are involved in the playback only as far as the information that is gathered during "keyboard measurement" to be written into the "tables" that are referred to as Robert explained to adjust the value of power fed to each solenoid to achieve the correct velocity of hammer.
As far as I am aware the MX80 series had no hammer sensors, but did have four point key sensors so the volume information was gathered from the velocity of the key by measuring the time between two points of the four point sensor.
I hope this adds to the knowledge of all and has not confused the discussion.

Kind Regards,

Leigh Whitley of: Lemuria Enterprises
Electronic Keyboard & Organ Service Division
Mob: (Loc.)0427-797-694
Mob: (Int.) 61-427-797-694
Phone: 61-2-9642-2170
Email: <lemuria@...>
Shipping Address:-
58 Highgate Street
STRATHFIELD
NSW 2135
Australia

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.