Posted on 09/11/2019 1:53:53 PM PDT by CaliforniaCraftBeer
“Higher sampling rates may be worse if you have a cheap DAC!
“Once you chop up an audio wave form into digital, you inherently lose some of its information.
Again, which is why the source must be considered. The higher the digital sample rate, the better.”
The Nyqist rate will capture all the info in a signal that has no frequencies above the Nyquist frequency.
The Problem is that there are frequencies above 20k in music that will alias to energy below 20k which distorts.
Anti-aliasing filters are used but if you try to cur-off at 20k you will affect frequencies below 20k also.
If you move the sampling rate up, you can filter out the frequencies (if any) above the Nyquist without affecting the audio quality.
Cannonball played a Super 20. I have a couple of friends with Silver Sonic tenors. Silver neck and bell. Very nice sound.
“The higher the digital sample rate, the better.”
Only if you have the proper equipment! Cheap equipment may sound better at lower sampling rates than they do at higher sampling rates.
I’m waiting for cars to start carrying a vinyl slot to replace the unused CD slots.
Last week Taylor Swift sold 867,000 copies of her album (679,000 were actual album sales; large numbers of stream playback counts towards sales these days).
The NEXT 199 albums out of the top 200 albums sold less than a combined 361,000 copies (less than 2,000 units of each album sold in a week).
It doesn’t matter what media it is recorded on, the new music AIN’T SELLING.
https://www.nytimes.com/2019/09/02/arts/music/taylor-swift-lover-sales.html
Most people are listening to mp3s or worse these days.
Isn’t that Sesame Street?
Hi Fi Shop Sketch - complete version
https://www.youtube.com/watch?v=DvswW6M7bMo
bttt
The Zephyrs offered similar configurations.
“No need. it is mathematically proven that digital audio recordings can be reproduced 100% faithfully as long as the sampling rate is at least twice as high as the highest audio frequency. “
We have gone through several reasons why this is not true. Now I present another via an exercise.
Draw a sine wave of three cycles. Now plot ‘sampling points’ at 2.1x the wave frequency.
Connect the dots and you will see!
By the way, you say at least twice the frequency. Try plotting that starting at zero degrees on the sine signal. The resulting output will be 0 0 0 0 0 0 0.
Here is an old discussion but presents real world problems of digital sampling. The comments are worth reading.
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