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Old 26th August 2012, 05:43 PM   #1081
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Quote:
Originally Posted by Lorien View Post
@ soundcheck: When WaveIO was designed I didn't thought at this aspect (of changing current values in USB descriptors) so the plain answer so far is: no, iPad will not accept WaveIO as the last one will report 500mA due enumeration. In the meanwhile (I think) I've found where do I have to change for WaveIO to report a power consumption of 20mA or less hoping that iPad will accept it. Tests are not completed yet but I'll let you know when I have a stable firmware.
If it works, there will be two: the old one (with no "iPad support") and this new one that will work only with external supply (as long as 20mA or less will be of no good for WaveIO when plugged into an ordinary USB port).


Cool. Thx for your feedback and efforts.
That'll open a huge marketsegment for Wave-IO.
The iPAd can run can run iPeng-player (up to 24/96 network playback) plus Wave-IO.

That can make devices like Squeezebox Touch or other network streaming devices obsolete.

With Android 4.1 there'll be more even more mobile devices to support. USB-Audio support seems to be a part of 4.1

Has anybody tested the WaveIo against the Samsung Galaxy SIII? It's supposed to be supporting USB DACs. I do not know how Android will
handle those USB power limitations!!??!

Cheers

P.S:
Lorien: I stil lhavn't pulled the trigger on your device, because I still hope that one day a multichannel device will hit the market!?!?!
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Old 28th August 2012, 06:22 PM   #1082
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Thanks Lucian!!!

We did recive the cards, and they are absolutley beautiful!!
I think i will buy another card and frame it and put it on a wall..
Magnus has heard it and reported very god sound..
Thanks!!

Mats.
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Old 1st September 2012, 04:55 PM   #1083
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Quote:
Originally Posted by soundcheck View Post
Cool. Thx for your feedback and efforts.
That'll open a huge marketsegment for Wave-IO.
The iPAd can run can run iPeng-player (up to 24/96 network playback) plus Wave-IO.

That can make devices like Squeezebox Touch or other network streaming devices obsolete.

With Android 4.1 there'll be more even more mobile devices to support. USB-Audio support seems to be a part of 4.1

Has anybody tested the WaveIo against the Samsung Galaxy SIII? It's supposed to be supporting USB DACs. I do not know how Android will
handle those USB power limitations!!??!

Cheers

P.S:
Lorien: I stil lhavn't pulled the trigger on your device, because I still hope that one day a multichannel device will hit the market!?!?!
i also would like to know the answer to this.

tablet pcs are on the rise and the sooner xmos is compatible the sooner we can be part of the future XP

id like to run the waveio off of asus transformer if possible.
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Old 2nd September 2012, 03:29 AM   #1084
wlowes is offline wlowes  Canada
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Default WaveIO and the TDA1541a

For 1541a enthusiasts, the WaveIO has a bonus feature. WaveIO's J9 Header offers up a variety of clock signals. I used the L5 pin as a source of 176.4Khz for DEM reclocking of the DAC chip. This clean clock signal at 4x44.1 is perfect for DEM reclocking a non oversampled 1541a DAC. Big jump in quality compared to using WS as a clock source. Another layer deeper into redbook.

I use the Grundig CD9009 Dem circuit.
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Old 2nd September 2012, 10:04 AM   #1085
PET-240 is offline PET-240  Australia
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Heya wlowes,

Any hints
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Old 2nd September 2012, 10:04 AM   #1086
PET-240 is offline PET-240  Australia
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Sometimes I hate iPhone.......

Hints on circuit schematic please?

Thanks,

Drew.
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Old 2nd September 2012, 10:29 AM   #1087
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Default Grundig CD9009 DEM

Thx wlowes, I'll try this between my xmos and tda1541a DAC.

@Drew:
I just found the circuit on page 32 in the Grundig CD9009 service manual.
Just click on "Get Manual" for the full pdf.

Grts,
Danny

Last edited by danny_66; 2nd September 2012 at 10:32 AM.
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Old 2nd September 2012, 03:20 PM   #1088
wlowes is offline wlowes  Canada
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Default here is a clip of the circuit

Instead of taking clock from WS, attach to L5. I used a high quality resistor that I had on hand (Riken) to make the connection. I did isolate the -15v feed with a small inductor. I don't know if either of these are important as I did not do any experimentation here. Just include it for full disclosure.
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File Type: gif dem.gif (4.2 KB, 764 views)
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Old 3rd September 2012, 10:45 AM   #1089
PET-240 is offline PET-240  Australia
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Can't get the thumbnail to be big enough to read, am I missing something?

Thanks wlowes!
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Old 4th September 2012, 04:45 AM   #1090
wlowes is offline wlowes  Canada
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Default clear circuit diagram

Pet-240
This is the only clip I have. You can get a clean picture by downloading the Grundig cd9009 service manual. Go to page 27. There are 2 1541a chips. Both have the required circuit on pins 16&17. My blurry gif will give you an idea of where to look on page 27.

If I can find the original post with diagram I'll post a link to it. So far it eludes me.
It is an easy mod but tricky soldering. Solder the Caps right to the pins of the TDA chip for best results.

Good caps to use would be... 1u smt pps cap - digikey # PCF1547TR-ND

Credit to ECDesigns see pic of his use of these caps for decoupling. I did the same only with 8.2u polymer. I suspect he has the better part choice.
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File Type: jpg caps on pins of 1541a.jpg (3.6 KB, 683 views)
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