Source should be the album name and if I remember correctly, it is 'Meteora'. Remember, you are not forced to do any of these mods. (And they are not spacing mods...)
[Hard]
01:13:19 (7,8,9) - Whistle sounds.
01:14:67 (1) - Increase the spinner length by one 1/2 tick.
01:22:08 (8) - The slider looks ugly... Maybe if you changed it to Catmull...?
02:00:60 (6,7,8) - Whistle sounds
02:02:08 (1) - Increase the spinner length by one 1/2 tick...again...
In fact, what's with you and so many Linear sliders? It seems a bit draggy... You may or may not change it.
02:12:45 (6,7,8) - Whistle...
02:13:93 (1) - Finish sound doesn't sound great...
02:30:78 (1) - I have different feelings for this part... One is that this spinner shouldn't be silent... Another is that this spinner shouldn't even be here at all... Third is that you should put a circle here instead of a spinner and then put another circle at 02:31:15... But really, that's up to you.
02:33:38 (3) - Clap sound.
02:37:45 (1) - Get rid of this circle and extend the spinner to where it was.
02:51:80 (7) - Change the slider 1/4 tick back and change the spacing deemed necessary.
02:55:41 (1) - Extend the spinner by one 1/2 tick...once again...
[Easy]
01:05:41 (1,2,1) - The sliders end in places which don't sound well with the music. I'd advise for you to change them as they sound very confusing.
01:12:26 (2,3) - End these sliders 1/4 tick back.
01:14:67 (1) - Spinner, 1/2 tick forward.
01:21:34 (4) - Instead of finish sounds, why not claps?
02:13:93 (1) - I don't like the silent bit at the end of the spinner and I don't see the point of it...
[gdeath's Normal+]
00:44:67 (4) - These return arrows don't sound great. Put them back 1/2 ticks if you want them and either put more notes after it or just redo that part.
01:43:93 - Please look at the enclosed picture.

01:48:19 (2) - Place this 1/2 tick back...
02:33:01 (3) - Remove this note... it seems like an extra...
[GbL's difficulty]
I got to say, it's well done compared to other ones... but as always, nothing is perfect.
02:22:08 (11,12,13) - Put the clap at just 12 and not at 11 and 13.
02:55:41 (1) - Put this spinner 1/2 tick forwards.
And yeah, that's my wall of mod done.