::  Posts  ::  RSS  ::  ◂◂RSS  ::  Contact

Compressing Dance Recordings With FLAC

January 18th, 2014
tech, music  [html]
When the Free Raisins run our own sound I record our playing to listen back to later. I keep these recordings, but seven tracks at 1GB each starts to add up. I could compress them as mp3s, but I might want the full-quality versions some day. I looked into lossless audio compression, and FLAC seems to be the most widely supported open codec. While I've seen people find compression ratios of about 50% for FLAC, I was expecting better than this because while I generally record a whole 3hr performance only some of that has much signal. Compressing at level 8 I ended up with files 67% smaller than whan I started:

(The files at the far left, squished down to 14.3% of their original size, consist entirely of silence. This is because when using my vsl1818 with Audacity I can only record tracks 1 through N. If for some reason we've set things up so no one is plugged into track 4, I still end up with a recording of that track, 3hr of silence. Ignore these in computing the average and flac only managed to make things 66% smaller.)

I could have combined multiple tracks from the same dance into one multi-track flac for better compression, but this seemed like too much hassle and too much chance of making files that would be hard to work with later.

Comment via: google plus, facebook

Recent posts on blogs I like:

Live the questions now

Here’s some advice that my Godmother, Lynne Caldwell, gave me a few years ago. I found it again the other day and it struck me that at least I understand its wisdom now. She really did get my problem. It feels like he’s speaking directly to me. It’s from …

via Holly Elmore January 23, 2020

International Links: a Revision

In 2011, I wrote a post arguing that international links underperform. I gave examples, using many links nearly all of which have rotted in the 8.5 years since, showing that the ridership on various air and rail city pairs was lower if they were in two di…

via Pedestrian Observations January 22, 2020

Algorithms interviews: theory vs. practice

When I ask people at trendy big tech companies why algorithms quizzes are mandatory, the most common answer I get is something like "we have so much scale, we can't afford to have someone accidentally write an O(n^2) algorithm and bring the site d…

via Posts on Dan Luu January 5, 2020

more     (via openring)

More Posts:


  ::  Posts  ::  RSS  ::  ◂◂RSS  ::  Contact