XMOS-based Asynchronous USB to I2S interface

[zibra]

I understand but have you tried REAL current measurements while playing hires files with NDK oscillators?
I assume Salas works better with more power headroom but if REAL current is about 350mA wouldnt it be better to just set it at 400-450mA than 600mA? Even for heat dissipation purposes? Have you tried how it sounds with different settings?

[merlin el mago]

Originally Posted by shoom

Hi Zibra
Yes Merlin that’s my take also.
I have my Salas BJT set up for a CCS of 670MA which seems to work well. From what I’ve read the Salas likes plenty on the CCS so just use a nice big heat sink.
I have my board and heat sink as follows
Franz Gysi style Salas
http://www.diyaudio.com/forums/power-supplies/192625-sslv1-1-builds-fairytales-10.html
Runs just warm and sounds sublime.
I used a linear reg previously and swapping in the Salas made a noticeable difference to the SQ.
I’ve had my WAVEIO for just over a year now and I’m still loving it.
I’m using my board with TP LVDS sender and receiver and that works very well indeed. Looking forward to WAVEIO’s Daughter.
Great work Lucien

For 5Vout I recommend you use Mosfet instead BJT in Salas BiB reg.

[zibra]

I know that measuring current by multimeter could have some "errors" but whats general idea of setting Salas shunt regulator for powering WaveIO.
If it takes real current for lets say 350mA with NDK oscillators on hires files and Salas works better with more power headroom, why dont you set it at 1A with very good heatsink? Does that mean it will work even better??
Im just curious whats the purpose of having such big power headroom in that case.
Sorry for beginner questions but I would really like to set it at its best.

Jakub

[lindamar]

Originally Posted by Lorien

That was the point: to work If you have some spare time please let us know what type of player are you using and with what settings. Maybe soon I'll have one iPad to play with for a short while (not mine) and want to take full advantage while I am with it. Thank you!

Lucian,

I mainly user the player that comes with the Ipad, but also tested other apps like "Golden Ear" (which plays almost any file format) and Spotify. I guess that you can virtually listen to any app that outputs sound ....

Nevertheless don´t forget that if you want to connect an USB cable to the Ipad you´ll need a "camera adapter" like this one:

Apple iPad Camera Connection Kit - Apple Store (U.S.)

Cheers
Pepe

[vanwykca]

Originally Posted by zibra

Can anyone please measure current for WaveIO board with NDK oscillators?
In first posts Lorien wrote current for board with FOX oscillators which consume much more power right?
I measured current connecting WaveIO to 4.5V battery and it shows 250mA. My friend measured it with hi-res files and it was up max. to 320mA.
It could be helpful information for setting up Salas shunt to work with WaveIO for example.

Jakub

Hi Jakub,

I am using WaveIO(NDK) with Placid HD shunt. Playing 24/192 res file the device consumes 320 mA as measured with Fluke 287. I've got the Placid adjusted to have 100 mA shunt headroom meaning the total current through the Placid is 420 mA. I hope this helps.

Cornelius

[zibra]

Thank you Cornelius! Its exactly the same current my friend measured with 24/192 files!
Have you tried different settings with Placid HD shunt and found 100mA headroom optimal for sound?

[tagheuer]

Updated list:

1. hirez69
2. analog_sa
3. m.massimo
4. ozlegend
5. luisbock
6. vitalica
7. palmito
8. gabanyayaya
9. danny_66
10. shoom
11.12. kp93300 X 2
13. lindamar
14. merlin el mago
15. Reo
16. arkadiush1
17. jmltinc
18. zibra
19. tagheuer

[hochopeper]

Updated list:

1. hirez69
2. analog_sa
3. m.massimo
4. ozlegend
5. luisbock
6. vitalica
7. palmito
8. gabanyayaya
9. danny_66
10. shoom
11.12. kp93300 X 2
13. lindamar
14. merlin el mago
15. Reo
16. arkadiush1
17. jmltinc
18. zibra
19. tagheuer
20.hochopeper

[shoom]

Originally Posted by merlin el mago

For 5Vout I recommend you use Mosfet instead BJT in Salas BiB reg.

Hi Merlin

Yes I did consider using the mosfet Salas but I only had BJT to hand. I’ll use the BJT for 3.3V on another project later.
A (slight) compromise in performance
Err yup.
But
Still loads better than the linear that I was using before.
I’m going to build up a 5V mosfet Salas when time allows.
Just as an aside
My board has the FOX oscilators

[merlin el mago]