|Funktion des gebundenen Clavichord - CC-Lizenz Berndt Meyer|
This is especially a problem for the discant strings. The tone is very low and has only a short sustain.
At first I tried to master the tuning with an ordinary chromatic tuner. This device worked fine for most of the strings, but really had no chance for the discant. The low volume and the short sustain could not trigger the needle of the tuner.
But help was on the way: I had a special microphone which takes the vibrations directly from an instrument, plugged this into an amplifier and the chromatic tuner worked at least a little better. But now I had cables running through the room and in the beginning the clavichord needed a constant retuning. No real solution so far.
As described earlier I had also the difficulty to clearly hear the octave. So I decided to invest in a real chromatic tuner, which identified also the octave. This instrument is really worth the money although when there are too many harmonic oscillations it takes some time to get the needle steady.
One thing is to look at a needle and hope the the electronic measures the right thing. The other thing are our ears and these are sometimes much more sensible than we think. When I got the initial tuning of the clavichord "nearly" right and started to tune the instrument for octave beat, quint, etc. I was again lost with the electronic tuners. Comparing a pitch by ear is far more easier. So I produced a series of tones with samplings of a clavichord. I recorded every note from C1 - C3, converted it to MP3 and loaded it to an iPod. When you let a certain note play in a loop you have enough time to find with the tuning hammer the sweet spot of the string.
If you want to give this way of tuning a try have a look at MP3-Files from C1 up to C3 . You can use them freely.