Sound editing help...

Hmmm..... I'm using Audacity (haven't explore it fully yet) So... I wonder how to make the sound could be heard from normal (right and left side) of headphone, to left, to right and back to normal... In SpiCa by Miku where she says, "tsunagu no" there's echo change from right side headphone to left side of headphone.

Example:

Spoiler:

At 2:11 to 2:12

Second question, how to make this kind of sound:

Spoiler:

]

At the first verse where there's a robotic kind of sound but I prefer to call it noise by the way...
If it other program has it, please recommend it...

P/S: If my questions already being asked in other thread, sorry and hope to give the link to that thread and may remove this post....

For the first ... You have to record in Stereo, click on the title of that track and split the stereo track to have two tracks, one left and one right. Then, you have to change the volume for each track ... And turn back the two tracks in one Stereo track ( select the two, and click the title of one the two tracks and " Make Stereo Track " )
... Or you can use the " Phaser " effect 8D

For the second thingie ... eeh ... Maybe if you use the High Pass Filter, then the Leveller ... idk o.o

...
And sorry if my english is not understandable 8D

Ooh... For my first question... Thanks a lot! It works.. Both way give good result but I'm still trying to work well with Phaser though...

But, for the 2nd... I found High Pass Filter.. But Leveller?? Can't be found...

Thanks again!!!