Passive I/V vs. traditional I/V, FFT pics. - Page 4

A 8 · 5th June 2004, 08:26 AM

Now it gets interesting, this is the Sony CDP playing a -70dB Dithered 16/44.

A 8 · 5th June 2004, 08:28 AM

Compared to the DAC Tester with no dithering at -70dB 16/44

A 8 · 5th June 2004, 08:29 AM

Last out is the dactester @-60dB 24 bits and 44kHz

Pedja · 5th June 2004, 05:08 PM

A 8, if that may help, you can download both dithered and undithered, 0dB and -60dB sine signals (.wav files) from here and burn by yourself to CD. You have there all the files analyses as such, so you can know what you are working with.

Pedja

Bernhard · 5th June 2004, 07:16 PM

Could it be that compared to the -70dB signal, with -60dB there are more bitd switching in the DAC chip and those extra switching bits are bad by accidant in the Sony ?

A 8 · 6th June 2004, 09:43 AM

Thx Pedja,

Quote:

A 8, if that may help, you can download both dithered and undithered, 0dB and -60dB sine signals (.wav files) from here and burn by yourself to CD. You have there all the files analyses as such, so you can know what you are working with.

I tried to burn these files but the program states they are the wrong format!?

Any idea as to why I can not burn them?

Also, looking at your pics I see similar hash on the non dithered signals.
Could it be that the "hash" only shows when analyzing 16 bit non-dithered data on a 24 bit processing system?

Pedja · 6th June 2004, 03:38 PM

Quote:

Originally posted by A 8
I tried to burn these files but the program states they are the wrong format!?
Any idea as to why I can not burn them?

I did not encounter any problem. What program do you use to burn them?

Quote:

Also, looking at your pics I see similar hash on the non dithered signals.
Could it be that the "hash" only shows when analyzing 16 bit non-dithered data on a 24 bit processing system?

That hash is the regular part of the conventionally generated signal. That’s why dither. The difference can be seen normally on 16 bit system.

Pedja

A 8 · 6th June 2004, 03:51 PM

Quote:

I did not encounter any problem. What program do you use to burn them?

Its a HP burner and I use whatever came with it; HP CD writer powered by veritas.

I've checked the files on my Xp laptop and they are indeed 16/44 but only one channel...perhaps thats why.

Pedja · 6th June 2004, 04:20 PM

Yes, these are the mono files. Work normally with Nero so I did not expect it can be the problem. The brief check says EAC or even Windows Media Player 8 (XP) can burn them too.

A 8 · 6th June 2004, 06:27 PM

Pedja,
I downloaded NERO and it worked...also seems the data source makes a difference.

OJG,
The pic below shows the passive balanced PCM1704K @ 0dB and a analog attenuator before the soundcard....still looks better then expected.

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5th June 2004, 05:08 PM	#34
Pedja diyAudio Member Join Date: Jun 2002 Location: Serbia	A 8, if that may help, you can download both dithered and undithered, 0dB and -60dB sine signals (.wav files) from here and burn by yourself to CD. You have there all the files analyses as such, so you can know what you are working with. Pedja

5th June 2004, 07:16 PM	#35
Bernhard diyAudio Member Join Date: Apr 2002 Location: Munich	Could it be that compared to the -70dB signal, with -60dB there are more bitd switching in the DAC chip and those extra switching bits are bad by accidant in the Sony ?

6th June 2004, 04:20 PM	#39
Pedja diyAudio Member Join Date: Jun 2002 Location: Serbia	Yes, these are the mono files. Work normally with Nero so I did not expect it can be the problem. The brief check says EAC or even Windows Media Player 8 (XP) can burn them too.

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