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Linux Luddites | Not all change is progress
The Linux Luddites are Joe, Paddy and Jesse. Every two weeks we produce a show where we try all the latest free and open source software and then decide that we like the old stuff better.
linux  podcast  audio 
8 hours ago by steelsouls
Digital Music: Can You Hear Above 16-bit/44.1kHz? - The Mac Observer
Imagine I said, "You should watch my special Blu-ray copy of Star Trek because mine is encoded with extra ultraviolet and infrared data and that totally makes it look better!"

At best you'd think, "My TV doesn't display UV or IR so it won't make any difference since I can't see those frequencies anyway." At worst you'd be concerned about getting a sunburn or a heat rash.

Now imagine I said, "You should listen to my special audio version of Miles Davis's Kind of Blue because I re-encoded it from the masters with special ultrasonic data and that totally makes it sound better!"

At best you'd think, "My amplifier filters out inaudible sounds so it won't make any difference." At worst you might even worry what pumping all this extra audio data into your speakers could do to them.

The thing is, this second example isn't hypothetical. What I've described above is happening right now as companies like Neil Young's Pono are telling people that audio files encoded at a bit-depth of 24-bits or a sample rate of 192kHz sound better than the 16-bit, 44.1kHz versions of the same audio on playback (recording is different, and we'll get to that later).

This difference between 16-bit/44.1kHz audio and anything greater than that has been tested (a lot... in double-blind tests) and we have yet to find any human that can reliably notice that difference. Bit depths greater than 16 bits and sample rates above 44.1kHz simply don't matter as long as the data is converted properly (and the industry's ability to do that conversion has improved substantially since those very first CDs were released at the dawn of the digital music era, though most of us at home don't have the skill or setup to convert and downsample properly).
audio  music  technology 
11 hours ago by rmohns
L-pad Attenuator Tutorial for Passive Attenuators
"The L-pad attenuator consists of two purely Resistive Elements in series with each other connected across a voltage source with the ratio between these two resistances forming a voltage divider network as shown below."
electronics  circuits  audio  l-pad 
20 hours ago by ddribin

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