Nothing super special this time.
Louis Barthélémy Champagne Brut Améthyste and a Domaine Drouhin.
No things like 1975 Bollinger Vieilles Vigne Francaise anymore, there's a bottle in London at $3000. Though my eccentric fave Laurent Perrier Ultra Brut is still <$50. Unlike some folks I like non-dose Champagne.
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Early here, but the Champagne and pinot noir are ready for dinner.
Enjoy!
I have a great 2008 Rioja I will shortly start on. Thankfully my beautiful wife has expressed a desire for Prosecco. Yes!
Same here. Tesco turkey (and very nice it was to) and some £4.99 (or was it £5.99) Cava from Morrison's. Well you have to push the boat out sometimes
Some where I got some of you guys going in the wrong direction with me. Maybe I jumbled pictures with comments.
The additonal LPF at the DAC output that I made cannot have any affect on the creation of the 'Gibb's' ringing.
When I added the filter at the analog output to remove HF, I also saw the Gibb's signal (ringing-like) not at the analog output any more; All removed from entering the PA input.
The end result is a much better output signal. I do not know why that filter was not already at the DAC output of a Mastering machine. I am sure there is a good explanation somewhere.
The analog output is now clean and clear. The PA being used at this time is a Marantz 7025....... I am having built several samples of Damir's (DADOD) wonderful SOTA amp...... a 450v/usec CFA with ultra low distortion at all load and output levels over a very wide bandwidth. I will use it to check any change in distortion and audibles with and without the HF filter. and compare with other VFA of conventional design/performance.
THx-RNMarsh
The additonal LPF at the DAC output that I made cannot have any affect on the creation of the 'Gibb's' ringing.
When I added the filter at the analog output to remove HF, I also saw the Gibb's signal (ringing-like) not at the analog output any more; All removed from entering the PA input.
The end result is a much better output signal. I do not know why that filter was not already at the DAC output of a Mastering machine. I am sure there is a good explanation somewhere.
The analog output is now clean and clear. The PA being used at this time is a Marantz 7025....... I am having built several samples of Damir's (DADOD) wonderful SOTA amp...... a 450v/usec CFA with ultra low distortion at all load and output levels over a very wide bandwidth. I will use it to check any change in distortion and audibles with and without the HF filter. and compare with other VFA of conventional design/performance.
THx-RNMarsh
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Here we go again
And when Clairborne and Franey had their $4k dinner in Paris at Chez Denis in 1975, the result of winning an Amex auction of a dinner for two anywhere that took the card, they drank a Thenard Montrachet, 1918 Latour, 1928 Mounton, 1929 Romanee Conti (their favorite), 1947 Lafite, 1961 Petrus, and 1928 Yquem, among other things. The food was o.k. too.
The article, which of course inspired widespread indignation, mentioned that most of what they had was available in NYC at retail, with the only really substantial price being 500 dollars for the RC.
I notice the Petrus is still available today and allegedly drinking well. Cost is around 10k.
I bought three bottles of the 1971 for 30 dollars each in 1976 iirc. I have one left. Storage has been good, but like any unrecorked bottle that old there is substantial ullage.
sans reconstruction
For a hoot read the recent Stereophile review of the latest Audio Note DAC, especially JA's sidebar measurements and comments.
Money ?
Oh, i should be interested to see the analog square wave signal with and without your LPF. Do-you think you can show them to us ?
And an other question. Did-you set your LPF at the input of tha amp ? If yes, what is his effect (listening impressions) on other signals, like from vinyls ?
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I'm making dinner now, I will go back over the pictures later. You did not do this at 44.1kHz sampling. Yes the 48kHz Gibbs effect at 96k sampling can be seriously reduced by filtering that still does not touch the audible range. When you burn a Red Book CD the Gibb's at 22.05k will be back. It really would be good to sit down with a good digital audio text.
Close. Investment banker. He spends more on wine and food in a week than I make in a year.
The analog signal is from an analog signal generator.... perfect square wave.
I record it via ML9600 analog inputs and then make a CD of it. I play the CD back and look at the analog output from the machine at the RCA/analog output.
In the listening environment, the LPF is used between the analog output of the ML9600 and the analog input to the BenchMark-2 which has its' analog output going to a PA. I do not have an LP system for many years.... too much distortion to my liking.
Before and after:
The ML-9600 does everything a sound card, computer/storage, software, burner and player does in one box. If anyone wants a really well built, sturdy and reliable CD machine just for playback... it is very good and can be bought used for 250-350 USD on eBay. it has hand held remote control, also. Bal-XLR I/O also.
I have it back in my system again and listening to music. I wont do any more work until the second one arrives.
THx-RNMarsh
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rayma has come to a rescue , thanks Ray.
I used the above software to make the attached screenshot.
I wrote the number of peaks at the top (or bottom) flat of the square wave against the number of harmonics on a sheet of paper.
There is a pattern emerging when looking at the two columns.
Then, by inspection, we can estimate the number of harmonics (H) that the SQRW is composed of by counting the number of peaks (P) visible at the top flat:
H=2P-1
It follows, that we can estimate the number of peaks (P) that will show-up at the top flat when we know the number of harmonics (H) that the square wave contains:
P=(H+1)/2
Enjoy whatever you drink and eat with whoever you are with (and drive carefully afterwards)
George
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