Important is this wrong? (1 Viewer)

[fooguru]

HI this question was in our trial exam and doesnt seem to make sense to me.
To calculate the file size of a sound recording
It is meant to be
Sample size x Sample Rate x Seconds x Minutes x 2 (stereo recording)
which is
10(bits) x 40,000 (bps) x 60 x 100 x 2
Which equals
4,800,000,000 bits
but the answer was given to us as 4.8gbs isnt this untrue due to the fact there are 8 bits in a byte? Did they just forget that?
I thought it should be more like 600mb

 

[cowfer]

If it says 4.8gbs then its right but if its 4.8gBs then its wrong. Since b - bit and B - byte

 

[nubix]

You sure they didn't mean 4.8 gigabits? Gb = bits, GB = bytes.

....too slow T_T

 

[fooguru]

UM unfortunately i didnt take it down but i would assume it said gb, thanks heaps that cleared it up like a topical cream

 

[LatK7]

This was a mistake.

10 x 40,000 x 60 x 100 x 2 / 8 x 1024 x 1024

Gets you about 600Mb, which is correct.

 

[joben]

calculating size of audio file:

sampling rate (Hz) x sampling size (bits) x no of sound tracks (2) x length in seconds = answer (in bits)


4,800,000,000 bits looks like the right answer. It is roughly the same as 4.8 Giga bits.

 

[Xenmae]

yes as you dont do minutes only seconds for file size as you calculate for seconds not seconds and minutes