Samples put in the 'Feedback no' category
| length (sec.) | Mel. profile | Dyn. profile | Note 1 | Note 2 | ||
| In msg 1 | 0.65 | 
 | 
 | Image (telegraph) | Cartoon | |
| Feedback no 5 | 0.14 | 
 | 
 | Osc analog | low spectr. | |
| In msg 3 | 0.35 | 
 | 
 | Abstract | Synth | |
| In msg 5 | 0.88 | 
 | 
 | Image (boing) | Cartoon | |
| Feedback no 6 | 0.40 | 
 | 
 | Boing boing | Cartoon | |
| Feedback no 4 | 0.21 | 
 | 
 | Kind of car alarm | ||
| Feedback no 1 | 0.28 | 
 | 
 | low spectr. | ||
| Feedback no 2 | 0.23 | 
 | 
 | low spectr. | ||
| In msg 2 | 1.63 | 
 | 
 | Image (telegraph) | Cartoon | |
| Feedback no 3 | 0.40 | 
 | 
 | Kind of ressort | Cartoon | 
Feedback no "feedback degree -2" in our usual scale - here is the corresponding typical profile :
| Polyphonic / monophonic | both | 
| Dynamic profile |  | 
| Melodic profile |  ,  &  | 
| Length | 0.5 to 1 s | 
-> Conclusion <-
We should modify the "feedback degree -2" category, in order to add 
  the following criteria :
  - low spectrum - dyn profile  - are very good to make "feedback no" sounds
 
  - are very good to make "feedback no" sounds