Download Motorized Guitar Tuner - Signal Processing and Speech

3
FREQUENCY MANIPULATION
76
FRAMUS − down tune with full speed
E
A
600
D
G
500
H
taus−value
e
400
300
200
100
0.2
0.4
0.6
0.8
time in seconds
1
1.2
1.4
Figure 50: Plot of measured values of table 9 over time (guitar FRAMUS )
The increasing relations are plotted in figure 51, which show an average
increase of about 1.75 times every half second with full servo strength. Only
the fourth string D shows inconsistency which can be explained by a replaced
new machine head (which was done by the other owner before).
Keeping these facts in mind for later conclusions the up-tuning behavior of
all strings is tested, again with full servo motor strength.
FRAMUS - up tune with full speed
Strings
E
A
D
G
H
e
Before
388
291
218
163
130
97
After 1sec
371
287
204
154
161
96
Before
438
331
258
193
150
107
After 1sec
395
313
228
175
139
103
Table 10: Measured taus-values by tuning up with full speed at different
start values
Motorized Guitar Tuner
Weißensteiner, Viehauser