I try to remember to include a warning as to the size of each photo which you may download, so you may judge whether you wish to wait that long for it.

• Drawing of a MacCann Duet's buttons -- Size: 8677
• Postscript version of same drawing for hardcopy purposes. -- Size: 12964

  Note that in each of these I provide a small gif to look at (without being able to see much), a large gif, to look at for serious study, and a Postscript file for sending to a printer if you want a really clean copy to work from. I don't recommend printing the .gif files, since they have lost too much resolution in the conversion process.

  Warning!

  I have just learned, thanks to e-mail from David Cornell that what I have (and have here documented) is a later modification of the MacCann system, "sometimes called the Chidley system", which produces a more rational positioning of the D and D# (Eb) keys, and also which has a more regular repetition of the keyboard pattern throughout the range (with the exception of some minor tweaks at the top end, which you should be able to see from my charts). This was described to me as being introduced late in the life of the MacCann duet, and since my instrument is from late in the last year of production before the factory shut down in 1957, it is certainly most likely to be of this sort.

  The older MacCann system instruments had several variations, depending on the number of keys present. I have (in a photocopy of an old tutor) several ones documented. These have respectively, 46,58, 67,72, and 81 Keys. I see that I shall have to produce keyboard layout charts (with octave markings) for all of them, but I probably won't invest the time necessary to trace the path through the buttons for each key for all the variants. I *do* have a life, contrary to popular opinion. :-) For the moment, you'll have to use my drawings as a starting point, and adapt them to the instrument which you find you have.

  I have just (10 April 1997) received a PostScript file from Kevin McKeogh , documenting a 68-key Lachenal MacCann. While awaiting my having enough time to draw up the others from the tutor, this can sever as an example of what a more "normal" MacCann would be like. (Thanks, Kevin.) The various forms of that image will appear at the end of this page for the moment, till I have enough others to justify a separate page for them.

  Now we return you to the previously scheduled program. :-)

  

  Now we have the fingering of each scale. You may find some of the scales named "creatively". As my excuse, I seldom think of the scales at all, but am forced into it by the interesting patterns required for this instrument.

  If you have corrections for any of my scale names, please let me know, and I will try to correct them. It will not be quick, given the number of steps between the initial drawing and the final image files, so please be patient.

  Also, in most cases, I did not re-name the accidental keys to match the key in use, so if you have corrections here, again please submit them. The address is below (at the end of this page).

  Note that the buttons in this instrument (Made near the end of the original Wheatstone run in 1957) do not exactly match any of those in the tutor which I possess, and which has a last revision date of 1948, with most of the dates being *much* earlier. I think that you will probably have to adapt this to any instrument which you obtain.

  Thank You -- DoN.

• Drawing of a MacCann Duet's Scale of Ab -- Size: 13387 bytes
• Postscript version of same drawing for hardcopy purposes. -- Size: 21923

• Drawing of a MacCann Duet's Scale of A -- Size: 13027
• Postscript version of same drawing for hardcopy purposes. -- Size: 22072

• Drawing of a MacCann Duet's Scale of Bb -- Size: 12652
• Postscript version of same drawing for hardcopy purposes. -- Size: 21207

• Drawing of a MacCann Duet's Scale of B -- Size: 12962
• Postscript version of same drawing for hardcopy purposes. -- Size: 22001

• Drawing of a MacCann Duet's Scale of C -- Size: 20606
• Postscript version of same drawing for hardcopy purposes.

• Drawing of a MacCann Duet's Scale of C# -- Size: 12962
• Postscript version of same drawing for hardcopy purposes. -- Size: 22229

• Drawing of a MacCann Duet's Scale of D -- Size: 12578
• Postscript version of same drawing for hardcopy purposes. -- Size: 21689

• Drawing of a MacCann Duet's Scale of D# -- Size: 13153
• Postscript version of same drawing for hardcopy purposes. -- Size: 21476

• Drawing of a MacCann Duet's Scale of E -- Size: 13044
• Postscript version of same drawing for hardcopy purposes. -- Size: 22158

• Drawing of a MacCann Duet's Scale of F -- Size: 12064
• Postscript version of same drawing for hardcopy purposes. -- Size: 21153

• Drawing of a MacCann Duet's Scale of F# -- Size: 12890
• Postscript version of same drawing for hardcopy purposes. -- Size: 21017
  

• Drawing of a MacCann Duet's Scale of G -- Size: 12258
• Postscript version of same drawing for hardcopy purposes. -- Size: 21000

• Drawing of a Lachenal MacCann 68-key Duet (Contributed by Kevin McKeogh) -- Size: 9954
• Postscript version of same drawing for hardcopy purposes. -- Size: 2630

• Drawing of a very early Lachenal MacCann 68-key Duet (Contributed by Kevin McKeogh) -- Size: 3189
• Postscript version of same drawing for hardcopy purposes. -- Size: 24764

• Lachenal Edeophone 61-key duet , sn 41?? Note that the orientation of the keyboard is different in this drawing from the others. (Contributed by Marc G. Lamb) Photo to come -- Size: 33137
• Postscript version of same drawing for hardcopy purposes. -- Size: 89206

• Image of the actual Lachenal Edeophone 61-key duet (Contributed by Marc G. Lamb) -- Size: 33137
• Lachenal 46-key duet (Contributed by William P. Keaveney) -- Size: 9297
• Return to my home page.
  

Copyright Donald Nichols - August 1996

Note that I have had to block any messages above a certain size, thanks to the massive flood of "SWEN" virii. Anything that gets near 90,000 bytes *will* be blocked. However, it is bad practice to send attachments to anyone unless they agree to receive it beforehand -- especially so in these days of virii running rampant. Contact me, and we will try to find a way to exchange images if you really have to.