by David Butcher on Wed Feb 14, 2007 7:40 pm
Hello Mick,
Thanks for that ...
Slightly belated answer to your comment on the Waldingfield Great Mixture. To be honest, it's not really a mixture at all, but a Sesquialtera bass and Cornet treble – hence my creation of the version 2 Waldingfield organ (I'm fairly certain this is how the “mixture” would have originally been presented when the organ was built in 1809). As such, it's prime function is not really to add brilliance and that's probably why it feels as though it is pitched an octave low. The pipes themselves will also be a bit wider in scale when compared to a true mixture and that will also tend tame the brightness of the sound.
By 1876 when the organ was rebuilt and the Great compass rationalised to 56 note bottom C to top G, stops like the cornet were pretty much out of fashion. I think that's why it would have been renamed mixture – new organs of that period in England didn't always have that much in the way of upper work and any mixtures that were present quite often did have tierce ranks in their composition. A true mixture from the 18th and early 19th century would most likely be a Furniture ... typically three ranks of quint and unison pipes that were fairly gently voiced and not too high pitched.
I can understand you saying that it sounds a little out of tune – the three ranks were not I'm afraid perfectly in tune with each other throughout the compass of the stop. I tuned the individual notes to get the fifteenth perfectly in tune to try to minimise the effect of this, but it is still noticeable to an extent. Of course, this is how the organ is in real life, so there's always a balance to be struck between authenticity and usability.
Finally, I'd just like to say thanks to Matthias for sharing so many pieces with us in this and the South Suffolk organ thread. I've really enjoyed hearing the organs put through their paces with a variety of music ... I'm now off to find some Krebs in my local music shop !
David