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Altmann Tera Player - Page 60  

post #886 of 1958
Quote:
Originally Posted by musicday View Post

The Tera Player is the best...smily_headphones1.gif
1000
 yes it is even for me smily_headphones1.gif

haha, nice shot! Independent, unbiased opinion
post #887 of 1958
Quote:
Originally Posted by rudi0504 View Post

Anybody know who is the man behind Altman Tera ?

He is Charles Altman from Germany

I posted his picture months ago, but thanks for the repost.He does deserve a big thank you for the hard work he did to give as am amazing SQ DAP.

post #888 of 1958

^ Looks like he's trying to hide the magic potion that helped him create the Tera Player. wink.gif

post #889 of 1958
Quote:
Originally Posted by musicday View Post

I posted his picture months ago, but thanks for the repost.He does deserve a big thank you for the hard work he did to give as am amazing SQ DAP.

I am sorry musicday

I got the picture from our local community biggrin.gif
post #890 of 1958
Quote:
Originally Posted by rudi0504 View Post

Quote:
Originally Posted by musicday View Post

I posted his picture months ago, but thanks for the repost.He does deserve a big thank you for the hard work he did to give as am amazing SQ DAP.

I am sorry musicday

I got the picture from our local community biggrin.gif
Don't need to say sorry I found that photo on the Internet and I am sure Charles won't mind.
post #891 of 1958
A Very Merry Christmas to all the Tera-Heads residing here!!!!!
post #892 of 1958
Quote:
Originally Posted by goodvibes View Post

You may find this interesting: http://www.naimaudio.com/sites/default/files/products/downloads/files/dac_white-paper_issue3.pdf

 

Thanks, that was indeed interesting. To my way of thinking though they don't pay enough attention to the DAC's dynamic performance and the analog buffer's linearity, though to be fair they give the latter a lot more attention than most. Nevertheless a good read.

post #893 of 1958
Quote:
Originally Posted by goodvibes View Post

You may find this interesting: http://www.naimaudio.com/sites/default/files/products/downloads/files/dac_white-paper_issue3.pdf
OT (Click to show)
its quite similar to my ackodac + other modules, except the dual ackodac is 4 channel (2 x complete ES9012 dacs) and any external oversampling is done on my computer. I have included everything including their clock supply upgrade, vibrational mounting on the clock, galvanic isolation before a fifo memory buffered 4 x OS synchronous clock/i2s, wifi/ipad remote, -113dB THD+N and 132+dB DNR output with a no global feedback discrete IV stage etc etc

if you are talking about the digital filter, they are using a DSP as I suggested was the better way of doing it these days and they are talking about a separate digital filter and analogue filter. they mention both in the one paragraph, but only in relation to each other. they mention oversampling in the digital filter being beneficial, in that it makes the job of the analogue low pass filter at the output easier. It means it can be further out of the audio band; one helps the other be more effective, but its 2 different parts of the circuit, 2 totally different circuit topologies, one digital, one analogue, one before and one after the dac.

its interesting reading in that it confirms the direction of my build is sound.

but i'm grasping at straws above as to why you linked me, if you simply thought I might find it interesting, thanks! its interesting enough, from an egotistical POV tongue.gif but there is nothing new there, ive had a similar working system for the last 12 months, but with the second pair of dacs and the control systems ongoing. they have infinite resources compared to me, their case will be much prettier most likely, but I havent skimped anywhere, there will be some areas I have outspent them; its been a 2 year money and time sink.

the analogue filter on the output for me is not so important, I tried some on the output and found no audible improvement and opc found no measurable improvement, so I omitted it, there will be some small amount performed by the mosfet capacitance. and i'm using digital DSP on my computer..

dont take me the wrong way above, not meaning to be a dick, just a bit confused.

hey those guys sure know what they are doing wink.gif

Edited by qusp - 12/26/12 at 7:15am
post #894 of 1958
Quote:
Originally Posted by james444 View Post

^ Looks like he's trying to hide the magic potion that helped him create the Tera Player. wink.gif

 

It's in his flimflam machine!

post #895 of 1958

Simply points at a ladder being capable of everything you talked about if you can do the filters etc outboard. This was also from 2009 before the others that you mentioned. It isn't about proving anyone wrong

Warning: Spoiler! (Click to show)

 and you're over simplifying the input comparison. I'm not against D/S DACs and that manufacturer uses them in their less expensive products, with similar though less costly massaging. I'm of the opinion that it's how you use them, ladder or d/s, rather than an either or proposition. At cost no object, the best I've heard use a ladder but that doesn't make it an absolute as many like to deal with here. It's just what I like.normal_smile%20.gif

 

What happens in a DAP has little to do with state of the art and involves many compromises. It's also where something like a wolfsen or ES with their VG modern inboard circuits and low power consumption are generally preferred.

 

I also wouldn't assume that Altmann has chosen all the wrong compromises inculding dynamic range and low def for a portable device. I'm actually familiar with a couple of his previous pieces. Like this one, they were also not for me but there was nothing wrong with them. He's into finding novel and simple solutions to complex issues. It's a very nice way to not get caught out. We rarely (never?) know everything that's happeneing in a circuit.

 


Edited by goodvibes - 12/26/12 at 7:43am
post #896 of 1958
cool (Click to show)
oh yeah the 1704 is a nice chip, and I would have loved if the ARTA R2R didnt become vaporware. ive never said anything against R2R or the 1704, ive thought of playing with it but I would just be duplicating hardware. it doesnt tick quite all my boxes, it wouldnt work in my setup, wont do DSD, doesnt have digital volume without external DSP etc. i've generally preferred ESS, but with enough funds and time it would be possible to do much the same thing with the 1704. I would need minimum 6 or 12 x 1704 dacs though $$$ which means MANY more low noise power supplies... more $$$. the final system i'm working on is a pairing of the multiple dacs and multiple poweramps controlled/sequenced with a headless computer, looking like a beaglebone at the moment

Quote:
and you're over simplifying the input comparison.

sorry not sure what comparison you are referring to? my ESS and the Naim? sure of course, I dont have time for a novel =) the ESS has an internal digital filter that I leverage some of and of course the 1704 is a single channel dac that needs quite some digital filter trickery with DSP or logic/flip-flops to gain the best of.
Quote:
I'm not against D/S DACs and that manufacturer uses them in their less expensive products, with similar though less costly massaging. I'm of the opinion that it's how you use them, ladder or d/s, rather than an either or proposition. At cost no object, the best I've heard use a ladder but that doesn't make it an absolute as many like to deal with here. It's just what I like.

nothing to argue with there, Accuphase uses the ESS in its top of the line products, totally agree past a point its how you use them, but you cant polish a turd. ladder or SD doesnt really matter to me, I just prefer ESS at the moment and have been given no reason to divert my attentions of the last couple years building this system.

rest answered in PM

for those that dont care to read any more of this thread with me and goodtimes, I moved it to PM
Edited by qusp - 12/26/12 at 9:24pm
post #897 of 1958

Goodtimes? I like it!bigsmile_face.gif

post #898 of 1958
Quote:
Originally Posted by flkin View Post

Quote:
Originally Posted by musicday View Post

The Tera Player is the best...smily_headphones1.gif
1000
 yes it is even for me smily_headphones1.gif

haha, nice shot! Independent, unbiased opinion

Great photo Levi. Happy Christmas.

Sent from my HTC One X using Tapatalk 2
post #899 of 1958
Quote:
Originally Posted by goodvibes View Post

Goodtimes? I like it!bigsmile_face.gif

yeah haha on the brain =) obviously I do indeed mean you
post #900 of 1958

I just did the modd on the Koss Porta Pro and they sound so much better and live...but this is all does to Tera Player wich is a 100% great DAP. Or i shall call it wavplayer?wink.gifsmily_headphones1.gif

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