John Curl's Blowtorch preamplifier part II

Status
Not open for further replies.
Zaphod is making sense. CD fails the rise-time spec. for the best possible audio. High frequency resonance is usually necessary. for low speed recording, like 7 1/2 or 3 3/4 or cassettes. 15ips is 'iffy' and at 30ips, resonance is an impediment. MC cartridges do better without added resonance, and only MM cartridges need it.
Still, even with added resonance, the rise-time is usually faster with analog playback than with CD.
 
I tend to think the contrary, as I said. If you want to match the same feeling of distance and room's reverberation, you have to put your mikes closer than your ears. Just record your speakers in your listening room from the place you sit, for a good illustration.
In fact, while it is always possible to bring "distance" to a close miked instrument by several methods ( sculpting the response curve+ adding artificial reverb), the contrary is, most of the time, impossible.

My point is that you tamper with the tonal balance and direct/reflection energy quota when close micing. How do you restore that in post? Reverb - nope. I blame you.

//
 
Well maybe with the stuff that you listen through, Jan. '-)
But I should qualify what I am really talking about which is the 'time' response rather than the 'frequency' response is where the problem lies. CD sucks in regards to 'time' response.

You pose wild stuff without any facts or figures. I can dismiss that just as easily and call it BS.

Jan
 
High frequency resonance is usually necessary. for low speed recording, like 7 1/2 or 3 3/4 or cassettes. 15ips is 'iffy' and at 30ips, resonance is an impediment. MC cartridges do better without added resonance, and only MM cartridges need it.

Of course it is necessary, to get some semblance of 'flat', if you don't look too closely. I don't understand that anyone can listen to that and call it flat. 'Trust my ears', yeah, my foot!

Jan
 
Of course, 24-96k or 24-192k should make the grade, BUT it still sounds compromised. What is still missing? However, 24-96k and above is hopefully the future, for even the CD lovers here. '-)
Why "the future" ? Is-it not the present ? CD is almost dead. Near Archaeological if I believe the record companies ;-)

24/96 does not sound compromised, in my opinion. May-be you can hear the 'signature' of the analog AD and DA parts of the gears you use. But it is the same for magnetic tapes, agree ?

Well, so many engineers I know made so many times the before/after tape test from an analog mixing desk during recording sessions. With so many people around. Musicians, producers. And, for what I know, nobody was never able to tell what was direct, what was digitized. With analog tapes, 0 errors, 100% of the players win. And with Vinyl ? Oh lord, you have the answer even before the first note begins.

Now, you have the right to "prefer" analog. For various reasons, including culture and nostalgia. But we are no more on the subject of "transparency".

Even with my PC speakers, I was able to win this test. In 3 seconds. :
YouTube
 
Last edited:
Why "the future" ? Is-it not the present ? CD is almost dead. Near Archaeological if I believe the record companies ;-)

YouTube


New cars are no longer fitted with CD players.

With yearly product evolution and mass market sales it’s a good barometer of the general public.

You are considered crazy or foolish or both if you are still using anything but digital streaming, let alone any kind of analogue medium. Using interconnects and cords in general is now strange.

Most are now purging all their CDs, as many did with LPs in the 80s and early 90s.

As much as you’ll have to pry my LPs from my cold, dead hands.... because I’m stubborn...

Analogue is now a minor curiosity, not a solution.

Digital will continue to improve. No one is willing to accommodate the large burden of “stuff” which is required to go backwards for minor perceived improvements. Very few are willing to accept 35lb boxes in their living room anymore. They will just wait until this tech catches up and focus their time on other aspects of life.
 
It has been about ten years since I was taking a CD player in a college arena to test the system, when a student looked at the gear and exclaimed "cool retro ."

In one arena even before that the audio quality difference between cassettes, carts, MP3s and digital file transfers were easy to discern even during a game. Not aware of anyone trying CDs during play. But even in my first stadium project CDs were transfered into a digital playback system based on a PC. Things are just a bit too hectic to play with them funny plastic discs. Although sometimes performers will bring them. So an ahead of time precued disc can still be found although it is much more common to be an MP3 file.

But there certainly are consumer systems that do not perform as well as the system in a football field.
 
What about 24/192 and even 24/96 ?

I have been VERY specific (as has Mr Curl) about the the superiority of high quality tape and vinyl, compared to 16/44 digital. Higher bit rates are capable of surpassing even the best analogue systems. We get the excellent linearity, S/N, speed stability along with a frequency response that can truly exceed the abilities of human hearing. 16/44 digital cannot manage the last feat.
 
Last year about this time, I went to a production of “So you think you can dance”, in a local theatre, wow, my ears were ringing for hours after. My friend who had his daughters along, actually had thought to bring along hearing protection, I was both jealous and feeling bad for having invited them along to share the free tickets.
Point being, it sounded a lot like mp3 type noise, but never had it been so amplified and painful in my experience. Ok the dance portion was amazing, but...

Made me really appreciate the days where a half decent CD player would have been used instead.

I saw a regular stagehand after, a past accomplice, who was there for the show. We both kind of looked at each other and both could tell what the other was thinking.

Also, have you noticed how Toyota is the last to have the latest mechanisms?
We have a 2001 that has a cassette tape..
 
Status
Not open for further replies.