The violist was asked to verify his tuning with an A440 standard sound and
then to play his A string as an open string, then to play the same frequency
stopped on a second string, then with vibrato, and then stopped a second time.
He then played a series of G's (starting with ) first without and then
with vibrato. This series was repeated.
The same procedure was followed for E
played in octaves without and
with vibrato. Finally the original experiment on A440 was played on the D
string.
We did not ask for the extensive repetitions which would be necessary for statistically significant data on each note as we felt that an hour was quite a lot of time to ask of a concert performer, and our object was to obtain a variety of pitches for use in our listening experiment. We nevertheless find this data interesting and are including it as Experiment 1; it is particularly useful in conjunction with Experiment 4, which reports a listening test on this performer.
A summary of all the pitch tracking results on the viola sounds are found in Table 3. They were read from graphs of frequency in cents (with respect to A440) vs time such as those of Figures 1 and 2 with the frequency of the vibrato defined as the average. Uncertainties are less than 2 cents. They are entered with one exception in the order in which they were played. Repetitions of the same note are marked ``(2)" in Table 3 and entered so that the same notes are on the same line of the table and their frequencies can be easily compared.
For convenience the D's are entered in the table in a column parallel to the results on the A's. This is an identical experiment although on a different note.