lardconcepts
Posts: 36
Joined: Mon Feb 04, 2013 11:32 am

Opinions on these cheap i2s S/PDIF/ TOSLINK/ analogue DACs?

Wed Oct 09, 2013 12:49 pm

I've been reading a fair few threads regarding high quality audio and, correct me if I'm wrong, but as I have no spare USB port (and they are exposed to the outside world and the DAC must be inside the box) then my choice is to get busy with a soldering iron and some pins on P5 and get an i2s DAC. Of which I have come up with the following 2 - and these are all I can find:

http://www.ebay.co.uk/itm/111145590537 which is i2s to seperate left/right phono socket. £12 including postage to the UK.
Image
Welcome to use this self-made CS4334 IIS/I2S Decode Board with H/P Output. It turns I2S signal into analog signal. And it can be connected with I2S and adjust any sampling rate between 2kHz and 100kHz.The output interface can be connected to headphone or power amplifier which could be used as audio input.
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And this http://www.ebay.co.uk/itm/111143816191 which is i2s to TOSLINK and SP/DIF optical and co-ax. £13.50 inc postage to UK.
Image
It is a product that can convert S/PDIF and I2S signal to each other. This product can convert the signal S/PDIF into I2S signal, or convert the signal I2S to S/PDIF signal.
If they actually do what I think they do, then this seems a very cheap solution to my problem. Or am I missing something obvious?

I'm more than happy to buy, try and review one of them if no-one else has, but it would be helpful to know if this really is compatible with what squirts out of P5 and if I'm doing it it right.

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meltwater
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Re: Opinions on these cheap i2s S/PDIF/ TOSLINK/ analogue DA

Wed Oct 09, 2013 2:08 pm

These look rather interesting, particularly the 2nd one (big fan of keeping things digital for as long as possible).
I expect you'll have to locate some i2s drivers before you get too far with testing them, not sure if any have been developed.
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lardconcepts
Posts: 36
Joined: Mon Feb 04, 2013 11:32 am

Re: Opinions on these cheap i2s S/PDIF/ TOSLINK/ analogue DA

Wed Oct 09, 2013 3:09 pm

meltwater wrote:These look rather interesting, particularly the 2nd one (big fan of keeping things digital for as long as possible).
Indeed. Just what I was thinking.
meltwater wrote:I expect you'll have to locate some i2s drivers before you get too far with testing them, not sure if any have been developed.
Yeah... well, there's the thing. There's this 452-post long megathread about i2s which seemed to go into great detail, but didn't mention either CS4334 (analogue out) or WM8804 (digital out).

Then I found this post which leads to this blog post about enabling i2s which in turn links to a more complete blog post called Compiling a Raspberry Pi kernel for ASoC audio implementation > I2S to DAC. None of them mention either of the above codec chips, however, it's a fairly comprehensive post.

I was hoping that i2s would be one of those things like SPI which is now enabled in the kernel and just needs selecting in raspi-config. As I mentioned above, for £13.50 I'm happy to be a guinea-pig for the digital-out board, and given it'll take about 14 days to arrive it gives me plenty of time to learn about compiling custom kernels.... just wish I didn't have to.

In other words, is the consensus here that there's it's a case of "there's a good chance it might work with some fiddling", rather than "no, it definitely won't work"?
Last edited by lardconcepts on Wed Oct 09, 2013 3:45 pm, edited 1 time in total.

ceteras
Posts: 231
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Location: Romania

Re: Opinions on these cheap i2s S/PDIF/ TOSLINK/ analogue DA

Wed Oct 09, 2013 3:41 pm

I've followed the I2S megathread for the same reason, I want to use an audio DAC which is not mentioned there, just hoping on compatibility.
I use TDA1387 which I hope will work with the TDA1541 driver.
My point is nobody should anser that "no, it definitely won't work".
Read the datasheets for your chip and compare them to those supported.
Find the differences then find the places where you need to modify the source.
Ask for help when you get stuck, you'll get it working in the end.

Edit:
I've bothered to read the CS4334 datasheet, it looks like you need one more signal though, the MCLK.
Generating this signal which is either 128x or 192x the BCLK is something I couldn't myself get my head around.
Other dacs use this signal too, and I would like to know the proper solution for it.

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0xFF
Posts: 202
Joined: Tue Nov 20, 2012 7:52 pm
Location: Poland

Re: Opinions on these cheap i2s S/PDIF/ TOSLINK/ analogue DA

Wed Oct 09, 2013 4:25 pm

I use this NOS DAC:

Image

http://www.ebay.co.uk/itm/DAC-NOS1-Non- ... 35c363db04

Works great with I2S driver.

lardconcepts
Posts: 36
Joined: Mon Feb 04, 2013 11:32 am

Re: Opinions on these cheap i2s S/PDIF/ TOSLINK/ analogue DA

Wed Oct 09, 2013 5:25 pm

0xFF wrote:http://www.ebay.co.uk/itm/DAC-NOS1-Non- ... 35c363db04
Works great with I2S driver.
Hmm, the only thing is, that module is over double the price of the other two and isn't populated with the outputs.
So, I'd like to try getting one of those working.

I found that there's a twin-pack, of one of each, for £19.81 + £1.24 postage total £21.05
http://www.ebay.co.uk/itm/111145562756

The infuriating thing is that puts it over the £15 "safe" import VAT limit, and not having dealt with the company I don't know whether they'll mark it as "gift" or whether it'll get stopped or what.

The analogue CS4334 is £9.09 with free postage http://www.ebay.co.uk/itm/350857034866

The digital WM8804 is £13.01 with free postage http://www.ebay.co.uk/itm/141039832749

Total £22.18 arriving in separate packages, £1.13 more than pack but no VAT worries, or wondering what the import handler will take on top.

Either way, I think I'll end up getting one or both - I'll let you know how I get on!

sebus
Posts: 10
Joined: Sat Jun 30, 2012 9:37 pm

Re: Opinions on these cheap i2s S/PDIF/ TOSLINK/ analogue DA

Sun Jan 19, 2014 3:45 pm

Any more news on this?

Thanks

sebus

koalo
Posts: 121
Joined: Mon Feb 04, 2013 4:02 pm

Re: Opinions on these cheap i2s S/PDIF/ TOSLINK/ analogue DA

Sun Jan 19, 2014 8:45 pm

A driver for the WM8804 was just merged into the Raspberry Pi kernel. It is build for this S/PDIF/TOSLINK board:
http://www.hifiberry.com/hbdigi

Any other WM8804 based board should work together with this driver, too, but this board has the additional advantage of being build for the Raspberry Pi (matching headers etc.).

Jack Wong
Posts: 1
Joined: Fri Oct 12, 2018 3:16 am

Re: Opinions on these cheap i2s S/PDIF/ TOSLINK/ analogue DACs?

Mon Oct 15, 2018 1:37 am

Hello...friends,
Is there any final solution for this idea?
I‘m using the CS4334 connected I2S port on PI3B.
It works but the sound quality is very bad...sounds lost some thing instantly...
Anyone have any ideas?

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