December 7, 2008

Sine Language – episode 103

In ep 103, a continuation of the discussion on home theatre,
Bomar asked about why I use Lame (which I use in conjunction with Speex Multi frontend) for mp3 encoding,
plus he gave us some links for websites concerned with hearling loss:
deafness.about.com
digital recordings
University of NSW
jimmyr (link 1)
jimmyr (link 2)

and Tim Cumings was after some advice on how to mic up his computer user’s group monthly meetings.


October 9, 2007

Some bedtime reading for you

Filed under: Analogue,Data compression,Ear,MP3,Sine Language — Bruce Williams @ 11:15

So, there I was, catching up on my morning round of tech blogs, when I cam across this great article on Ars Technica about how MP3 encoding works.

Having now read the article, even I have learned some more about how the prcoess works.

It makes interesting reading (if you’re into this kind of thing), and will only take you about 15 minutes (there’s 4 pages to the article).

Interestingly, the Nyquist Theorem actually dates from work done by Harry Nyquist way way back in 1928 (the Ars article says ’27, the Wikipedia article says ’28)…. certainly a lot earlier than I had previously thought.

Anyway, thought I’d share this with you in the absence of a Sine Language for this week.

Cheers,

Bruce.


July 22, 2007

Sine Language – episode 067

This week’s episode was inspired by a comment on the Zoom Handy H2 portable recorder blog post.
Joseph (from English Mojo) asked about what to look for, and what to avoid, in a field recorder.
After running through a checklist, I moved on to a discussion of how to calculate data storage requirements based on given sampling rates, bit resolutions and channels.
Here are some of my notes:

WAV
1hr @ 44k 16 bit stereo = 10MB/min or 605MB/hr
1hr @ 44k 32 bit stereo = 20MB/min or 1210MB/hr
1hr @ 48k 16 bit stereo = 10.9MB/min or 659MB/hr
1hr @ 48k 32 bit stereo = 21.9MB/min or 1318MB/hr
1hr @ 44k 16 bit mono = 5MB/min or 302MB/hr
1hr @ 32k 16 bit mono = 3.6MB/min or 219MB/hr
1hr @ 22k 16 bit mono = 2.5MB/min or 151MB/hr

MP3 (CBR 320)
1hr @ 44k 16 bit stereo = 2.29MB/min or 137.3MB/hr

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June 25, 2006

Sine Language – episode 016

Filed under: !Podcasts,Data compression,Sine Language,Spatial cues,USB — Bruce Williams @ 19:50

This week, Bruce answers more listener e-mail, including: Putting an MP3 into another MP3, USB audio interfaces on an Apple laptop, what specs for a new computer with an ‘audio production’ bias?, plus (finally), the directionality of human hearing.


June 27, 2005

Building the pod – episode 001

In episode 1, Bruce takes you on a quick tour of the 2 track editor in Adobe Audition v1.5.