hosted on condor3913
 Mechanical Music Digest  Archives
You Are Not Logged In Login/Get New Account
Please Log In. Accounts are free!
Logged In users are granted additional features including a more current version of the Archives and a simplified process for submitting articles.
Home Archives Calendar Gallery Store Links Info

End-of-Year Fundraising Drive In Progress. Please visit our home page to see this and other announcements: https://www.mmdigest.com     Thank you. --Jody

MMD > Archives > May 1998 > 1998.05.02 > 10Prev  Next


Ampico Hammer Velocity Recorder
By Karl Ellison

The May/June 1996 AMICA Bulletin has several articles on how Ampico
recorded the velocity (and therefore the note's dynamics) of the hammer.
Ampico's recording device contained two recorders: one was used to
record the notes played by the pianists on paper, similar to a standard
marking piano of the day.  Integrated into and right next to the note
recorder was the dynamics recorder.

According to the diagrams, the dynamics recorder had 3 wires going to
each note on the piano.  Each note has two sets of contacts and a
common ground (totaling 3 wires) that are 'made' just as the hammer
impacts the string: one contact calibrated to connect _just_ before the
second.  The dynamics recorder's spark chronograph then graphically
showed on a second roll of moving paper the difference in time between
the two contact connections, allowing the arrangers to determine the
*hammer velocity* at that point (faster moving hammer = shorter time
difference between the 2 connections, slower hammer = longer time).

As a side-note, when the recording was later arranged, the Ampico
keyboard was equally split into 8 segments encompassing 9 and 12 notes
grouped in 3 or 4 3-note clusters evenly distributed across the compass
of the keyboard so that each 12-note section could have their dynamics
controlled independently of the other.

It's worth noting that this is oftentimes hardly what the pianist
actually played.  For instance: what happens when 2 or more notes (as
in a chord) are struck with differing forces within a 12-note cluster?
I would think the editors approximate the volume and, with no choice,
make those notes the same volume.  If true, realize that in this
situation, the original dynamics are now lost!  But this was their
way of approximating a real recording by arranging the expression in
12-note segregated 'clumps'.

To be sure, there is only so much room at the margins of a piano
roll to put the dynamic information, but this hardly represents a
"reproduced" performance in my mind, though this was the mantra of
the 'reproducing' sales pitch, then and now.

Karl Ellison


(Message sent Sun 3 May 1998, 02:07:17 GMT, from time zone GMT-0400.)

Key Words in Subject:  Ampico, Hammer, Recorder, Velocity

Home    Archives    Calendar    Gallery    Store    Links    Info   


Enter text below to search the MMD Website with Google



CONTACT FORM: Click HERE to write to the editor, or to post a message about Mechanical Musical Instruments to the MMD

Unless otherwise noted, all opinions are those of the individual authors and may not represent those of the editors. Compilation copyright 1995-2022 by Jody Kravitz.

Please read our Republication Policy before copying information from or creating links to this web site.

Click HERE to contact the webmaster regarding problems with the website.

Please support publication of the MMD by donating online

Pay via PayPal

No PayPal account required

                                     
Translate This Page