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This should be required watching
Posted: November 25th, 2019, 11:08 am
by DaveR
Great video that explains and shows facts and myths about digital audio.
https://xiph.org/video/vid2.shtml
Re: This should be required watching
Posted: November 25th, 2019, 12:31 pm
by SoundMods
If only "life" was as simple as sine waves. There is far more going in with music traversing the A/D then D/A conversion -- much more than can be explained with a simplistic viewpoint. If only.
Re: This should be required watching
Posted: November 25th, 2019, 2:42 pm
by DaveR
It's a primer, not an in depth analysis. I suspect there's a lot of information in that video that most people here don't know. Not trying to insult anyone, there' s lot of misconception.
Re: This should be required watching
Posted: November 25th, 2019, 2:53 pm
by SoundMods
DaveR wrote:It's a primer, not an in depth analysis. I suspect there's a lot of information in that video that most people here don't know. Not trying to insult anyone, there' s lot of misconception.
I don't think anyone that saw your message was insulted. No. Not at all -- why would they? I just didn't want folks with a limited knowledge think that digital recording and playback can be reduced to a simple video explanation.
Re: This should be required watching
Posted: November 25th, 2019, 6:44 pm
by Pelliott321
I thought the presentation was quite good, and if one watched the complete session the presented announces that he simplified the presentation for the uninformed and provided info to where to go to dig deeper.
Re: This should be required watching
Posted: December 2nd, 2019, 5:19 pm
by TubeDriver
Do people really think that DACs send out stepped sine waves to components downstream (preamps, amps, speakers)?
Re: This should be required watching
Posted: December 4th, 2019, 5:22 pm
by Stuart Polansky
TubeDriver wrote:Do people really think that DACs send out stepped sine waves to components downstream (preamps, amps, speakers)?
Nope. Ones and zeroes.
Re: This should be required watching
Posted: December 4th, 2019, 9:16 pm
by Cogito
TubeDriver wrote:Do people really think that DACs send out stepped sine waves to components downstream (preamps, amps, speakers)?
From the digital communication engineering POV digital signal are treated as square waves. This is because digital communications is only interested in snapshot of the signal at certain intervals. What happens to the signal between the intervals is of no consequence.
In reality, digital signals are not smooth sinewaves. They look closer to square waves.
I am sure you meant to say DAC receives digital signals from upstream devices.
Re: This should be required watching
Posted: December 4th, 2019, 11:10 pm
by TubeDriver
No, I meant that the signal coming out of your DAC as seen by your preamp has been filtered/reconstructed and is not stepped.
Cogito wrote:TubeDriver wrote:Do people really think that DACs send out stepped sine waves to components downstream (preamps, amps, speakers)?
From the digital communication engineering POV digital signal are treated as square waves. This is because digital communications is only interested in snapshot of the signal at certain intervals. What happens to the signal between the intervals is of no consequence.
In reality, digital signals are not smooth sinewaves. They look closer to square waves.
I am sure you meant to say DAC receives digital signals from upstream devices.