Wonderful comments, and fairly good with the translation.
Being a performing cellist as well as an RPT, I should provide some
help here.
Cellists do not usually tune in pure fifths, we are taught to tune the
A - D fifth pure, due to common use of sharp keys in strting literature. But
the other fifths are tuned tempered, leaving the C supposedly in tune to ET.
HT will make the C sharper than ET, but would make us very unpopular with the
winds.
Experience shows that bass players have a great deal of trouble
tuning their E strings. Harmonics will leave the E string sharp to ET, due to
widened sharps. since the amount of tempering is subjective in both cellists
and bassists, and it affects both lowest strings the most, getting the cello
C string in tune to the Bass E is a monumental task! It is hard enough to get
the celli to agree on the C, and it sounds clearer than the bass E. Try
getting the bass E in tune to the violin E would be an even greater trick!
SInce the violins all tune their E pure to the A, the basses should tune
their E pure to their A by harmonics. The cello A (open strings) should be
checked with the basses A and E for purity. The cellos need to temper down to
the C perhaps more than ET so that the C to E sounds like a good tempered
third, not too wide!. This would take a while and would definately bruise
some egos in the orchestra, but if it could be done, the orchestra WILL sound
better in tune!
Suggest this order of tuning:
1) Basses to oboe, A to E
2) Basses check to each other, E strings on harmonic
3) Violins tune their A and E to the oboe.
4) Basses check harmonic E to violin E( repeat 1-4 if needed)
5) Violas and celli tune all strings down to C
6) Violas and celli check their C strings
7) Violas and celli play C together, while Violins and Basses (on
Harmonics) play their E strings. Result should be an acceptable ET wide third
(in octaves).
8) Entire orchestra tunes D strings
9) Entire orchestra tunes G strings.
This seems like it would take forever, but within a week I bet the
orchestra will never give it up, and it will be just as fast and much more
effective than the old way.
Michael Meade, RPT
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