If the WAV file is stored on the CD and USB CD/DVD/BD Drive connected to Raspberry Pi or other, so WAV file is read from the CD, not from the hard drive, and you will hear much better sound quality than a hard driver. This is because CD is a good storage media is better than the hard disk. It read less jiiter when WAV file is read from the CD. This is also one of the reasons why the sound of the CD transport can be better.
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Recordable Disc only 0.2 US dollars for one. You can try to do directly, the price is not high, but the degree of sound is very obvious to enhance. Then you will know that CD is really better than hard disk for a storage media.
As long as you do the same experiment yourself, you will find that the TAS report is completely wrong. In my experiment, only the storage of the media is different, the rest of the conditions are the same. This is a fair comparison experiment for the disc and hard disk.
Do Hard-Disk Drives Sound Better Than CD?
Do Hard-Disk Drives Sound Better Than CD? | The Absolute Sound
The jitter being read off the CD has no direct impact on the jitter at the DAC. Your finding that CD sounds better most likely is down to other causes than jitter.
Even if the DAC has a reclock function, any input signal with jitter, the sound quality will be deterioration, because it only can reduce jitter, can not make jitter disappear.
My hard disk has been defrag. In my experiment, only the storage of the media is different, the rest of the conditions are the same. Do you think there is an unfair comparison?
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Since it's all buffered into memory, there is no difference. Except the noise from a spinning hard drive is lower than a spinning CD.
Flash memory is worst storage media for a music file. Magnetic tape is best. This is why the recording studio is using tape as a storage medium during digital recording.
Unless you are using MSB's DAC, it uses a very very high precision clock, it is possible to do close to completely eliminate jitter, otherwise you will hear a better sound quality when you play a WAV file from CD. Moreover, if you want to rely on DAC to eliminate jitter, this is to put the cart before the horse. Why not from the source as much as possible to reduce jitter?
Do not talk too much, try it directly!
Most of the popular recordings are done "direct to disk" not tape these days... Do you even know where your precious WAV files come from?!
A WAV file is made of, for example, 100 data units. When the WAV file is stored on CD, the 100 data units are stored continuously so that the time difference between each data unit is relatively small when the read head reads the data from CD, and there is almost no jiiter.
The same WAV file is stored in the hard driver, the 100 data units may be scattered on the driver, even if the hard drive has been defrag, so that the head read WAV file from the hard driver, the time difference between each data unit is relatively bigger and bigger jitter.
Tape and CD are the same to stored continuously the data units, but CD has many holes on the surface of the CD to make the reflected light easily deflected, resulting in jitter. Also, the tape is fixed speed, unlike the CD is not fixed speed. Tape is best.
The studio really pay attention to the recording quality, he will choose to use TAPE to store precious recordings.
Flash memory is the worst, because it uses of the same the hard driver with the decentralized storage means and when read WAVE file from flash memory, there will be a large number of transistors are turned on/off, and each switch speed is not the same, this is very easy to produce jitter. Flash memory will have a bunch of high-frequency noise.
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Is this thread an attempt at the 'highest number of misconceptions per page' prize? Or is it all some sort of joke?
😱
The jitter spec at the pin of the DAC is the only thing that matters. In fact if you make the path from this pin to the clock source just one mm longer it will have significantly more jitter. Reason is that converters work at very high frequencies with block pulses. Adding a low pass filter at these frequencies, for instance the extra induction and capacitance from a one mm longer print track, will increase jitter.
The signal coming from a CD laser is extremely jittery, because of the thickness tolerances of the CD medium, and because its spinning and thus vibrating. Feeding this signal without any jitter reduction into a DAC will result in audible artefacts.
Fortunately there are simple solutions to this problem: FIFO buffers with PLL array's, ASRC to name a few.
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