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Audio Reference

SSL

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Start here:



Links in bold text indicate recommended places to start reading (in no particular order).
 
Please report broken links by leaving a comment or sending me a pm.
 
Books


Glossaries


Ear Training


Measurements


Headphones & Loudspeakers


Overview


Impedance & Sensitivity


Transducer Characteristics


Soundstage and Stereo Imaging


Amps & DACs


Overview


Power


Audio Science


Sound Characteristics


Sound Perception


Electrical Engineering Principles


Distortion


Digital Audio & Digital Signal Processing


Acoustics


Audio Myths


Diagrams

 

Human Ear

 

 

Ear

 

Instrument Frequencies and Sound Terminology

 

 

Frequency Chart

 

Sealed vs Ported Subwoofer

 

 

Sealed vs Ported Subwoofer



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Recent updates:

  • Toroidal power transformers and why they're dumb
  • USB cable jitter measurements (spoiler: no differences whatsoever)
  • SuperBAF measurements link

I'll try to fix broken links with WayBack Machine shortly.

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Added a forum post with measurements of two popular USB "decrapifiers". These devices are widely lauded by audiophiles as bringing significant improvement to USB DACs.

 

As is to be expected, they do nothing to improve measurable audio quality. In fact, they make it worse, which makes sense given the real-time nature of isochronous, asynchronous USB.

 

These devices are even LESS beneficial than little bags of rocks - and just as much a waste of money.

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Added a forum post with measurements of two popular USB "decrapifiers". These devices are widely lauded by audiophiles as bringing significant improvement to USB DACs.

 

As is to be expected, they do nothing to improve measurable audio quality. In fact, they make it worse, which makes sense given the real-time nature of isochronous, asynchronous USB.

 

These devices are even LESS beneficial than little bags of rocks - and just as much a waste of money.

 

What devices are you talking about ? DACs in general or just these two popular devices?

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What devices are you talking about ? DACs in general or just these two popular devices?

 

Not DACs. These are devices that supposedly clean up the USB connection itself. The two tested are the AudioQuest JitterBug and the Uptone Regen.

 

Obviously, this is just one set of measurements, so they could be flawed in some way. But this is the first objective examination of the performance of USB "decrapifiers" that I've seen.

 

It's worth noting that AudioQuest also sells other snake-oil products, like $1000+ HDMI cables.

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