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Old Jan 24, 2008, 03:05 AM   #1
matthewHUB
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Macbook Air 4200 as a recording device?

Hi all,

Just wondering if the 4200 HD in the macbook air is fast enough to record audio in real time using a usb audio interface, like a tascam US-122?

I want to know whether it would be possible for 24-bit recording. Using this very portable machine to replace endless pounds worth of powerbook/power adapter etc will just make my live a whole lot easier. Can the 4200 do it? or do you need SD?

M
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Old Jan 24, 2008, 03:08 AM   #2
ethernet76
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I think it depends on how many tracks you plan to record at the same time.
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Old Jan 24, 2008, 03:10 AM   #3
matthewHUB
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just stereo, with 2 phantom mics.
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Old Jan 24, 2008, 03:30 AM   #4
boyhandsome
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Yes,can somebody please advise which one the HDD or SS, is better; the price is not my concern; my cocern is to balance the disk space and speed. Thanks.
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Old Jan 24, 2008, 03:33 AM   #5
ethernet76
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Originally Posted by matthewHUB View Post
just stereo, with 2 phantom mics.
You should be fine. Through put on two tracks is like at most 5 mb/s.
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Old Jan 24, 2008, 03:35 AM   #6
ethernet76
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Originally Posted by boyhandsome View Post
Yes,can somebody please advise which one the HDD or SS, is better; the price is not my concern; my cocern is to balance the disk space and speed. Thanks.
The SSD is faster in all respect I believe. The on area HDDs have over SSD is sustained write/read. However that's against decent 10k or 7200 drives. The 4200 drive is rather crappy.
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Old Jan 24, 2008, 11:44 AM   #7
matthewHUB
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Originally Posted by ethernet76 View Post
You should be fine. Through put on two tracks is like at most 5 mb/s.
How can it be at most 5 mb/s? If a cd is 16bit and is 780 mb for 72 mins (near enough), then that equates to 11mb/s. 24 bit is obviously going to be more than that.

It's nice because you can still get great USB audio interfaces, so the lack of firewire is not a problem.
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Old Feb 22, 2008, 01:23 AM   #8
dcr
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Originally Posted by matthewHUB View Post
How can it be at most 5 mb/s? If a cd is 16bit and is 780 mb for 72 mins (near enough), then that equates to 11mb/s. 24 bit is obviously going to be more than that..
You're off by a factor of 60 or so -- check your units.

780MB/72min ~= 11MB/min.
11MB/min * 1 min / 60s = 0.183 MB/s

The actual red-book CD datarate (650MB for 74min) is ~ 150KB/s.

http://en.wikipedia.org/wiki/CD
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Old Feb 22, 2008, 01:51 AM   #9
riyadc2
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Originally Posted by ethernet76 View Post
The SSD is faster in all respect I believe. The on area HDDs have over SSD is sustained write/read. However that's against decent 10k or 7200 drives. The 4200 drive is rather crappy.
Actually Harddrives write faster then SSDs. SSDs can read much faster though, especially non sequential reads.
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