enigmatic puzzle - Batman and the grid

This a sequel to: Batman and the piano

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Master Bruce has received three items, in the mail, from none other than Edward Nigma.

One item is a piece of paper with a grid of dots in an arrangement of 10 dots wide by 12 dots high.
It looks like this:

The second is a slip of paper that simply states:

75 67 67 63 66 3a 2f 2f 74 62 62 2e 74 79 2f 38 66 4c 4c 53 37

The third is a note that states:

Dear Detective,

I hope this finds you well. I'm sure you've been anxious for our next game together. I've placed a bomb somewhere in Gotham. You have one chance to figure out where it is!! You must send this letter back to me with the correct location circled on the grid. If it is incorrect, the bomb will go off! If, by some miracle, you're correct - then perhaps we'll have another game to play together, some day!

Good Luck!

Your friend,

E. Nigma

Perhaps you people can once again help us? This one may take a little time, but I do not know how much of it we have.

Answer

Is it 2 from the left, 7 from top ?

Decoding the track from Deusovi's answer using by calculating its "spectrogram". For people who know about signal analysis, it is basically using the Fourier transform of each of many finite pieces of the signal, then putting all those results in a stack. This gives a spectrogram, and when plotted with a color scale, it gives the posted result.

left 3 in german; right 4 in german; left 3 in italian; up 7 in german
right 4 in english; left 1 in german; left 5 in italian; left 6 in french; right four in english

EDIT: Actually forgot to analyze the other of the two stereo tracks:

Mixing the two:

UP 2 RIGHT 4 UP 6 RIGHT 4 UP 7 2
LEFT 3 DOWN 3 LEFT 3 UP 4 RIGHT 4
DOWN 8 RIGHT 3 UP 2 LEFT 6 UP 1
RIGHT 4 DOWN 5 LEFT 5 UP 5
LEFT 1 DOWN 1

Tracing this on the dotted graph:

There is only one way as it touches all borders.