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    Step 3:     Drag “Change pitch effect by 10” block in the script area, which is
                                         used to change the speed of the sound of table sprite. Now change

                                         its value from 10 to 30. (For increasing its speed).
                                       Then drag “play sound… until done” block in the script area, to play

                                         a sound completely. Choose any sound of tabla. (e.g. Hi Tun Tabla).
                                         So, no need of wait block now.

                        Step 4:  Repeat the step 3 again.  (See script/code in Fig. 3.1)
                        Step 5:  When we click on the “flag” now, the sprite “tabla” plays the sound four

                                    times, but when we next click the flag, speed of the sound increases
                                    every time. To remove all these effects, do the following more steps:-
                                    i)    Drag the blocks “clear sound effects” and “set volume to 100%”

                                         and drop these blocks one by one under “when flag clicked” block.

                                    ii)   So, every time when we click on the “flag”, the sound starts from
                                         initial “volume and speed” of the sound and this will remove all the
                                         previous effects from sound.

                              Check Your Knowledge

                      1.      You have seen so many sound effects in Scratch now. Write their names to do

                            the following tasks.

                                 Action                                                              Name of Block
                            a.   Change the pitch of the sound of sprite                             ___________

                            b.   Increase the volume of the sound of sprite                          ___________

                            c.   Decrease the speed of the sound of sprite                           ___________

                            d.   Remove all the sound effects                                        ___________

                            e.   To set the pitch of the sound of sprite to a
                                 specific value                                                      ___________

                            f.   To stop any kind of sound of sprite                                 ___________

                      2.      Under  which  block  “clear  sound effects”  block  of instructions  available  in

                            Scratch?

                      3.    What is the meaning of “set pitch effect to…” block?

                    32                         KVS DELHI REGION 2025

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