Comments on: Old but Gold https://diyparadise.com/w/old-but-still-gold/ ... where we have more fun! ... Wed, 09 Nov 2016 15:28:16 +0000 hourly 1 https://wordpress.org/?v=6.0.9 By: Dimiter https://diyparadise.com/w/old-but-still-gold/#comment-417 Wed, 09 Nov 2016 15:28:16 +0000 http://127.0.0.1/wordpress63/?p=286#comment-417 That’s why the NOS DACs are rarely used despite their surprisingly good sound for the rubbish that’s coming out of them. That’s why we use Digital Filter before the DAC. It reconstructs perfect sinewave even at 20kHz. When you need a 20kHz upper frequency the 44.1kHz with a digital filter is the perfect solution. Of course if you want to digitize a vinyl record or a studio master tape 96k or 192k is more adequate in order not to lose information from the original source. But I’m personally not sure if I can hear the difference between 44.1k and a 96k on a good oversampling DAC.

]]> By: yeo https://diyparadise.com/w/old-but-still-gold/#comment-269 Tue, 30 Oct 2012 07:58:42 +0000 http://127.0.0.1/wordpress63/?p=286#comment-269 hi chris

yes, not clean. i’m taking the output signal from the dac chip directly. less one factor that could influence the waveform here.

but yes, a low pass filter will clean up the harmonics.

yeo

]]> By: Chris https://diyparadise.com/w/old-but-still-gold/#comment-268 Sun, 28 Oct 2012 16:18:58 +0000 http://127.0.0.1/wordpress63/?p=286#comment-268 Looking at the output of the DAC is not the place to look. You need a good low pass filter. If you low pass the signal to 20KHz you will see a nice clean sine wave. The “steps” are all caused be frequency components about 20KHz.

]]> By: yeo https://diyparadise.com/w/old-but-still-gold/#comment-267 Fri, 13 Jan 2012 22:56:24 +0000 http://127.0.0.1/wordpress63/?p=286#comment-267 hi mr altman

thanks for reading and you are welcomed!

yeo

]]> By: Charles https://diyparadise.com/w/old-but-still-gold/#comment-266 Fri, 13 Jan 2012 17:01:17 +0000 http://127.0.0.1/wordpress63/?p=286#comment-266 Hi,

it makes me proud and happy, that you have understood and shown, what I wanted to explain on my website.

Cheers,

Charles 🙂

]]> By: Jochen Lanz https://diyparadise.com/w/old-but-still-gold/#comment-265 Mon, 17 Oct 2011 19:11:39 +0000 http://127.0.0.1/wordpress63/?p=286#comment-265 Hi folks — by all this up and non sampling comments:

DON’T FORGET 99% of all our today Music 😥 Compact Disc and MP3 😥 is finally released in this crappy 44,1Khz format. So the harmonics, the overhats and every treble information looks like the above sinewaves!!!

😛 But…just this week end again I could confirm that reproduced nicely with Monica or an other fine sounding DAC this isn’t a big problem.

]]> By: yeo https://diyparadise.com/w/old-but-still-gold/#comment-264 Tue, 12 Jul 2011 12:04:09 +0000 http://127.0.0.1/wordpress63/?p=286#comment-264 ” higher rez played at 16/44.1 sounds better than native 16/44.1?”

i don’t know. as explained, i never tried that.

yeo

]]> By: charlyb https://diyparadise.com/w/old-but-still-gold/#comment-263 Tue, 12 Jul 2011 08:04:35 +0000 http://127.0.0.1/wordpress63/?p=286#comment-263 Yeo, thanks for that. Can you confirm that ‘d got it right with my first sentence, that is, hihger rez played at 16/44.1 sounds better than native 16/44.1?

]]> By: yeo https://diyparadise.com/w/old-but-still-gold/#comment-262 Sun, 10 Jul 2011 13:55:20 +0000 http://127.0.0.1/wordpress63/?p=286#comment-262 hi charlyb

note that for this test, i didn’t use any sd card player nor sd card. it’s through a mac mini and jkenny’s modified i2s m2tech.

the qa550 sd card player could only play 16/44.1 so the above couldn’t be done.

the i2s m2tech plus pure music player software allows up to 384khz sampling rate.

so what you are asking is completely different.

yeo

]]> By: charlyb https://diyparadise.com/w/old-but-still-gold/#comment-261 Sun, 10 Jul 2011 07:23:24 +0000 http://127.0.0.1/wordpress63/?p=286#comment-261 If I understand you, higher rez files played at 16/44.1Khz on the TDA 1545A sound better than native 16/44.1 files. If so, could you play higher rez files (at 16/44.1) on your SD card player and would you hear a difference?

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