hi,
the most impressive result of tuning my parasound d/ac-1600hd was this mod. the sound is clearly more powerful and agile, but low jitter sources still sound better. i would like to encourage all cs8412/14 user to try this mod, if they have not-tuned-clock-devices.
by default only high-frequency jitter is strongly attenuated by the cs8412/14. with the following mod jitter attenuation over the entire audio range is achieved. the settling time increased to round about 1 second, but who cares ? no synch problems with pc and cd-player digital optical out @44.1/48khz and 44.1khz cd-player cinch was flashy.
[schematic attached]
the most impressive result of tuning my parasound d/ac-1600hd was this mod. the sound is clearly more powerful and agile, but low jitter sources still sound better. i would like to encourage all cs8412/14 user to try this mod, if they have not-tuned-clock-devices.
by default only high-frequency jitter is strongly attenuated by the cs8412/14. with the following mod jitter attenuation over the entire audio range is achieved. the settling time increased to round about 1 second, but who cares ? no synch problems with pc and cd-player digital optical out @44.1/48khz and 44.1khz cd-player cinch was flashy.
[schematic attached]
Attachments
I can not tell from schema, that
you use separate supplies for analog and digital supplies of CS8412 as well as a decent SPDIF input. Let us know to assess if your advise is worse trying.
If you don't have, separate supplies for VD and VA, doing so will give you a big improvement, especially if you use a decent (low noise) reg.
I have good results with the reg101-5 (for each) as close as possible on the supply pins.
Same accounts for the SPDIF-input.
Henk
you use separate supplies for analog and digital supplies of CS8412 as well as a decent SPDIF input. Let us know to assess if your advise is worse trying.
If you don't have, separate supplies for VD and VA, doing so will give you a big improvement, especially if you use a decent (low noise) reg.
I have good results with the reg101-5 (for each) as close as possible on the supply pins.
Same accounts for the SPDIF-input.
Henk
Playing games with the RC vlaues will lower the corner frequency. At the risk of severe overshoot in the response.
IOW.......while it is tuned to a lower frequency, and takes longer to settle, it probably does so because it is underdamped and swings back and forth a few times.
Jocko
IOW.......while it is tuned to a lower frequency, and takes longer to settle, it probably does so because it is underdamped and swings back and forth a few times.
Jocko
>At the risk of severe overshoot in the response.
I have still no low-jitter clock ready. my best source is a sony cdp-50xaes cd-player and its digital-out sound quality with this mod is improved. maybe the sound quality is slightly decreased when using a tuned low-jitter-clock+hq-out-device. that is still not tested.
even a single 47 uF BG-NX as filter cap is working great and sounds better than the 2 x 0.47 uF BG-NX alone. i tried to lower the r to 330 ohm, which was working for some days without problems also.
greetings.
I have still no low-jitter clock ready. my best source is a sony cdp-50xaes cd-player and its digital-out sound quality with this mod is improved. maybe the sound quality is slightly decreased when using a tuned low-jitter-clock+hq-out-device. that is still not tested.
even a single 47 uF BG-NX as filter cap is working great and sounds better than the 2 x 0.47 uF BG-NX alone. i tried to lower the r to 330 ohm, which was working for some days without problems also.
greetings.
Long ago, Pete Goudreau experimented some values for the filter caps :
Here (7th §)
Also here
And finally here
Worth reading 😉
Here (7th §)
Also here
And finally here
Worth reading 😉
Monkey-business
Ever heard of the Wildmonkeysects loop-filter?
No monkey-business pls [joke]
http://db.audioasylum.com/cgi/m.mpl...ighlight=loop-filter+wildmonkeysects&session=
😎
Ever heard of the Wildmonkeysects loop-filter?
No monkey-business pls [joke]
http://db.audioasylum.com/cgi/m.mpl...ighlight=loop-filter+wildmonkeysects&session=
😎
Attachments
many thanks for the links, CheffDeGaar and Elso!
but it seems, that nobody tried a electrolytic as filter cap before. that is strange, cause a small electrolytic has less inductance than a big foil capacitor. i came to good results with unpolar black gate nx. but maybe a small rubycon za or even a simple tantalum could make a good job also ?
but it seems, that nobody tried a electrolytic as filter cap before. that is strange, cause a small electrolytic has less inductance than a big foil capacitor. i came to good results with unpolar black gate nx. but maybe a small rubycon za or even a simple tantalum could make a good job also ?
Reina:
I risk non friendly answers by asking this, but i lack knowledge and instruments to test it myself (i only tested "by ear" 😉 ) :
I have used the superE-cap configuration ( a pair of non-polar BG's in antiparallel way) with success in A and D power supply (save once that I got audible ringing 🙁 )
Have you experience with this?
It will only cost you the price of another BG-NX to test it 🙂
(I hope Jocko is not around 🙁 )
Good luck.
M
I risk non friendly answers by asking this, but i lack knowledge and instruments to test it myself (i only tested "by ear" 😉 ) :
I have used the superE-cap configuration ( a pair of non-polar BG's in antiparallel way) with success in A and D power supply (save once that I got audible ringing 🙁 )
Have you experience with this?
It will only cost you the price of another BG-NX to test it 🙂
(I hope Jocko is not around 🙁 )
Good luck.
M
What evil lurks in the heart of men.......
Only Il Duce knows.............
Since you guys don't have the gear to measure this stuff........
You can only lower the LF corner so far since you do not have access to the series resistor in the LPF. But why listen to me when your ears never lie.
Jocko
Only Il Duce knows.............
Since you guys don't have the gear to measure this stuff........
You can only lower the LF corner so far since you do not have access to the series resistor in the LPF. But why listen to me when your ears never lie.
Jocko
Reina said:
At least, Taylor and Peter Daniel have tried huge electrolytics cap as PLL filter.
There is a formula regarding capacitance and resistance of CS8412/14 PLL filter:
The higher the capacitance, the lower the resistance.
Taylor's
http://pinkfishmedia.net/forum/showthread.php?threadid=4869&perpage=15&highlight=&pagenumber=1
Peter Daniel's
http://www.diyaudio.com/forums/showthread.php?postid=782204#post782204
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