(Redirected from Echo)
The pitch effect warps the pitch upwards or downwards depending on the value of the effect (i.e. positive values shift audio higher in pitch, negative values shift audio lower in pitch).
Note: a change of 10 corresponds to one half-step. So to go up a whole octave, you must set the pitch effect to 120, since there are 12 half-steps in an octave. A value of 100 will sound like a minor 7th. Same goes for negative values: to lower a sound by an octave, use a value of -120.
The maximum the pitch effect can go is 360 and the minimum is -360. The pitch the sounds play as stay at 360 or -360 if you set the pitch effect to higher than 360 or lower than 360. As a result, it is impossible to completely pause sounds or play them instantly using the pitch effect blocks.
Right now the pitch effect works by changing the speed of the sound, although in the future the Scratch Team may change it back to only affecting a sound's pitch.
The pan effect causes the audio to shift towards the left or right output track, depending on the value of the effect (i.e. positive values shift audio to the right, negative values shift audio to the left). A value of -100 will shift the audio completely towards the left track, while 100 shifts the audio towards the right track. 0 is the default value, and doesn't affect the audio.
Like the pitch effect block, the pan effect block has caps. The minimum the pan effect can go is -100 and the maximum it can go is 100. Setting the effect to higher than 100 or lower than -100 does not change how the sound will shift any more than just setting it to -100 or 100.