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Can digital get to vinyl sound and at what price?
The digital anti-aliasing filter that corrupts the digital sound during the recording process might be the the reason for "bad" cd sound. There is a filter acting on the vinyl sound too, but it is a RLC type analogue filter and acts on the cartridge signal (coil voltage) during the playback...- acmn
- Post #3,284
- Forum: Digital Audio Forum: DAC, Transports, Digital Processing Forum
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Can digital get to vinyl sound and at what price?
That is what I said too, even explaining the exact reason. No credit for that?- acmn
- Post #3,282
- Forum: Digital Audio Forum: DAC, Transports, Digital Processing Forum
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Can digital get to vinyl sound and at what price?
Vinyl is nowadays from digital source too. So why does it sound "better", is a mystery. Maybe the reason is the "natural" filter that acts on it in the playback. The voltage induced from the cartridge coil will never reach the amplifier as it is, instead it will encounter such a combination of...- acmn
- Post #3,280
- Forum: Digital Audio Forum: DAC, Transports, Digital Processing Forum
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Is Your Loudspeaker Perfect For You?
You should convert the stereo sound to three channel sound, that's the starting point. Like this: center= L+R left=L-R+2kR right=R-L+2kL k=0...1. Parameter k is controlled by the user, with a pot for example. If k=0, we get: left=L-R, right=R-L. And if k=1/2, we get: left=L, right=R. This is... -
A Tale or Three Phono Stages
When amplifying signal from MC cartridge the DC gain is typically 80dB (100,00x).- acmn
- Post #11
- Forum: Phonostages
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Cartridge Loading- A Misnomer
Obviously the formula for Ropt in that document is meant to tune the quality factor (Q) - not the damping factor (z) - to value 1. But because z = 1/(2Q), it means that z is to be tuned to value 0.5. This results to a slightly peaked frequency response with ringing in the time domain. In fact...- acmn
- Post #78
- Forum: Cartridges
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Cartridge Loading- A Misnomer
Yes, I'm familiar with that document, but as I see it, there's an error; the formula for Ropt is not correct if the goal is to achieve ideal damping. (*) It is: Ropt = ?(L/C), but it should be: Ropt = ?(L/C)/2, (1) or, if the coil resistance R' is taken into account: Ropt...- acmn
- Post #77
- Forum: Cartridges
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Cartridge Loading- A Misnomer
Were you referring to the short circuit loading in the previous post? With zero-ohm load the hf spike is reduced automaticly because the cable capacitance is not present; it is left without current. No danger of hf spike because C is missing.- acmn
- Post #76
- Forum: Cartridges
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Cartridge Loading- A Misnomer
If you are referring to my design, I don't see any reason why it would be more prone to this hf spike. It can be damped down in the usual way, by choosing suitable input resistance. And quote from you: Open to correction if I'm off base here... Regards, MK- acmn
- Post #74
- Forum: Cartridges
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Cartridge Loading- A Misnomer
No badwidth limitation required, quite contrary. The op amp in the input stage is LM4562 which has GBWP of 45MHz minimum. If the gain of the stage is 200, the bandwidth is at least 45MHz/(200+1) = 224kHz. Regards, MK- acmn
- Post #72
- Forum: Cartridges
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Cartridge Loading- A Misnomer
Maybe this is a bit out of subject but... I think that when we talk about cartridge-amplifier interaction a lot of misnomers and obscure comments could be avoided if we could see the issue simply like this: There is a low-pass LCR filter acting on the cartridge signal, where "signal" means the...- acmn
- Post #69
- Forum: Cartridges
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