Skip to main content

Recent Posts

1
Vinyl / Re: >20kHz content found in vinyl?
Last post by stephan_g -
It was my first LP digitizing session with my dad's USB turntable. I'm just glad I didn't destroy the record with that "trick".
Stylus covers tend to have a huge surface area when compared to a stylus and would only be riding on top of the surface anyway, so I wouldn't expect very much to be happening really.
Oh yeah, and I'm already violating all sense of "preservation" by using a USB turntable, and also recording at 48/16.
Could be worse. It could be one that's not only a cheap hollow plastic POS but only sampling at 22 kHz to boot! No kidding, those exist.

USB turntables are a convenience product, and as such manufacturers will be inclined to make them as cheaply as possible (see e.g. tea bags or fast food). The first ones also tended to be made by companies usually churning out novelty crap and the like rather than actual hi-fi makers. That's a solid basis for a bad reputation right there. Not to mention that you would have been able to pick up a decent hi-fi belt drive job from the '80s (maybe even a direct drive) plus a usable phonopre and acceptable USB soundcard for well under $100 US, too (and achieve much better results with that) - at least a few years ago.

We did decent vinyl rips 20 years ago in 16/44 on 16-bit ISA jobs, so who am I kidding, but if you don't feel like pushing your luck with the anti-alias filters on cheapie ADCs, I'd recommend using 96 kHz anyway (if available) and downsampling later if needed. Looking at e.g. some Realtek onboard chips, I've seen ADC responses that didn't drop appreciably until above fs/2, whereas good software resamplers are pretty much perfect - not to mention what seems to be high jitter in 44.1 kHz and multiples (manifesting itself in degraded SNR and apparent aliasing).
2
The distortion of the pickup is a big part of the problem. I understand why you want to deny it, but I know of no means to play records without one. Do you?

Yes. Lasers, right?  :D

Rather expensive, and I have a vague memory of someone telling me that, even though it looks like the ultimate toy for LP listeners, the results are not that good. Sorry, can't quote source on that. And I'm sure you know about the Japanese laser players.

Oh yes. the ELP  It was in such bad in need of post-transcription correction that for at least a while, it was sold with software to fix up the needle drops made with it. It turns out that a regular stylus distorts the groove and scrapes dirt away in beneficial ways.

http://elpj.com/
3
Lots of new high end phones like most Samsung phones after the S5 lack the internal slot.
S7/S7 Edge, S8/S8+ all have microSD slots,

Correct. I mistakenly thought that since the s6 made the SD slot go away, it stayed away. Thanks for clarifying this.
4
I... guess so? Sorry, i'm not sure what you mean. I'm using the default UI and built-in playlist viewer, if that helps.
5
I'd get Redmi 4A - Notes are fairly large and more expensive.
It comes with OTG, so you can fire up say UAPP and use external DAC with it.
Xiaomi phones usually tops up at 0.55Vrms, not quite compelling value for full sized high-impedance headphones, likely due to EU volume limits.

However I'd advise going the Rockbox route, if you could get your hands on say Clip+ or Zip - I don't think anything for Android can match RB - even the most basic functions like transport controls are often not so well implemented in Android offerings (no Stop button, go to specific time, or Hanning FFT displays). Plus both Sansa DAPs have really good specs in terms of audio.

Also if you're aiming at 10 years of service life - I don't think phones can achieve that in regular use. Moisture and condensation being the issue here - after 5 years you're looking at systemboard-wide solder contamination if you take the device anywhere with you. Devices with IP67 certification could be exempt from this, but then the digitizer layer has limited lifespan too, completely glossing over the fact that you'd have to change the battery every so often (like 2-3 years).
In any case, your phone would be on life support after those 10 years (sic) if it survives.

Low-tech music devices (Panasonic portable CD players) are usually more rugged to withstand years of service, if you don't mind replacing the belt and oiling the reading head (but then who uses those :D [except for yours truly])
 
Just my 2c

What does rockbox mean and is there any Android app for that.
6
Isn't that up to the playlist viewer to implement over again, because there is no SDK interface for implementing the shift-clicking behavior?
7
Vinyl / Re: >20kHz content found in vinyl?
Last post by kode54 -
Isn't that part of the ritual?

It was my first LP digitizing session with my dad's USB turntable. I'm just glad I didn't destroy the record with that "trick".

Oh yeah, and I'm already violating all sense of "preservation" by using a USB turntable, and also recording at 48/16.
8
Experienced this with 1.3.14, updated to 1.3.16 and the problem persists. Also tested with a clean portable install of 1.3.16.

Normally, when you have a single file selected, you can hold shift, click on another file.
Those two files and all between are then selected.

Let's say i have ten tracks in the playlist. I click track two, hold shift, click track five. Two to five are selected.
I click five again, and only five is selected. Hold shift, click nine. Five to nine should be selected, instead, two to nine are.
9
Don't over analyze this...  You will need to replace the phone and SD card every 2-3 years, based on my experience.
JXL
10
Vinyl / Re: >20kHz content found in vinyl?
Last post by Atmasphere -


Quote
What was your procedure?


(1) Obtain a collection of both legacy and modern test records. In many cases obtain 2 copies, one for general use, one for very limited use for tests that were done for "The record".

(2) Obtain several turntables ranging from Ion to Dual to Rega to VPI

(3) Obtain a number of legacy and current cartridges

(4) Do needle drops of selected tracks and analyze them to ensure tone arms and cartridges  are optimized

(5) Take the most promising results and duplicate tests using test records from the reserved group.

(6) Typically unless it mattered, I did some pretty merciless weighting of the results to give vinyl the best chance of developing results that people would not dismiss out of hand because they were so horrible. I edited out tics and pops by hand.

Generally what I found was that once I got the Rega set up well, it was hard to improve on it.  Oh yes, and that compared to digital, vinyl sucks. It measures so bad that it even sounds bad.

Quote
I don't know how you could set up a Rega arm well. The arm lacks some essential adjustments, making proper adjustment with most cartridges almost impossible.

Quote
Details, please

I just googled up 10 articles on the Rega arm, and while they recommended upgrades of one kind or the other, none criticized the items you mentioned.  Here's your challenge. I'm a degreed engineer with about 50 years of experience with mechanical mechanisms in gneral and tone arms specifically. Convince me!


Since I was not born yesterday, I fully expected your response. Needless to say, its what you get under these circumstances.

BTW, I'm holding a spoiler or two in reserve, to see if you know what you are talking about. Yyou've already tripped over one of them - you have not said anything about the other three turntables that I have. Obviously, the ION is a give-awy, but that leaves 2 that you seem to have no dirt to dish out about.
The Rega arm is pretty well set up if you use their cartridge. If you don't, you have a problem. You can't adjust the arm height; VTA is not adjustable. No adjustment for azimuth. No antiskate. Bearings in the plane of the arm tube rather than at the LP surface. And so on. Its built to a price point but I think the arm on the Technics SL1200 of yore is a better arm.

Quote
If your vinyl setup sucks as bad as you say,
Quote
So far you have not given any support to that claim. Until you do, it has no credibility.
I refer you to your own text above, to wit:  "vinyl sucks. It measures so bad that it even sounds bad. "  If your LP setup is sounding bad, well, that sucks! It should sound great, with not a lot of difference between it and digital. But you are quite consistent in saying that is sounds much worse, which suggests poor setup or an inferior rig, or...?


Quote
its likely that there is something wrong with the setup or the LPs you have are in dreadful condition. You should not be hearing any differences in bandwidth for example, nor any distortion in any passages.

Explain to me how fresh test records played with fresh cartridges of good quality be in dreadful condition. Credible evidence would take the form of technical proof of meaningfully better performance. Seeing none...

Well you could have left them out on the dining room table so the 14 cats you keep walked all over them, and then scratched them in the way to the turntable... I have no idea, just that it can happen (BTW, what is your test LP, when and where did you get it?). What's meant by a 'cartridge of good quality'? That sounds really subjective to me. $100? $500? $4000?  Regardless of cost or 'quality' it could be damaged or poorly set up (that's my current theory, glad to have you shoot it down- what do you use for a protractor?).

Quote
Regardless, wouldn't you also want to subtract the noise of the phono section from your results?

I told you how I did that, but it seems like it shot right over your head.
Or I just didn't see it, which isn't the same thing.


Quote
Otherwise the measurements might be skewed. Some phono sections are -85 db and some are -55db.

If I had a phono section that was so bad that its noise or distortion drowned out or even audibly  affected the copious noise that is inherent in LP playback, I'd agree with you that it was a serious problem.
Quote

What's meant by 'copious noise'? QRP makes pressings that are quiet enough that if your phono section is making -75 db, its the noise floor not the LP.
Quote
What are the legacy cartridges for?? The cantilever on any cartridge really isn't going to perform properly after 4-5 years!

I guess you don't know that cantalevers  have a virtually unlimited life if you don't damage them mechanically. 

I guess you don't have a clue that you tell a cartridge that is too old by means of simple measurements with test records.
Hmm. So without any idea on your part, you think I don't use test records?

?? if the cantilever is not the problem, and the stylus is not the problem, are you saying that a cartridge can get too old by some other means? What would that be? Sounds like you are suggesting that the coil is failing, something in the cartridge body?

Quote
And I'm supposed to pretend that you are some kind of authority? If you want credibility around here you have to earn it. We all know that people who post under aliases can claim to be anybody they want and nobody can disprove it, until they fail to provide information that the person in question is supposed to have. 

The challenge to produce is up to you, but so far not so much.

I really don't care what you pretend. Its out of my purview. I don't pretend that you are an authority either; maybe you have credibilty on some boards, clearly on others you do not. That's the way it is on the web. I was just asking some questions I actually  wanted answered but you seem more focused on personal attacks. Take it down a notch; maybe don't take it personally and just answer the question??

A correction:
FWIW I didn't say cantilevers 'wear out'. I said they won't **perform**. I think something is perishing, but I don't know for sure. I know its not the stylus as under the microscope the examples I've seen have had plenty of life and I know its not the cartridge body, as replacing the stylus/cantilever assembly fixes the mistracking. That really only leaves the cantilever and since its been undamaged in the examples I've seen, that suggests something is perishing.

If you could do me a slight favor- don't nest your responses?