Newbie question on Squeezeplay with EDO and DAC

[Willefg]

Hello,

I got my hands on a O2 Joggler with SqOS installed. I wanted one as an alternative to the SB Touch. I managed to install the EnhancedDigitalOutput but my main DAC (Poppulse PCM1796 MkII) only works in 16/44.1 since everything coming from the LMS (on Windows 7 server) gets downsampled to 705 kbps. I tried the same DAC with iPeng HD on an iPad with the CCK directly and then I get up to 24/96, the iPad's limit. Next to that I tried my mobile headphone DAC, FiiO E07k, on the Joggler and then iPeng states it isn't downsampled.

When I look at the device info at the Digital Output menu item in the Joggler it is empty for the FiiO (?) and for the PCM1796 it is as follows:

USB- Audio - C-Media USB Headphone set
Status: Running
Speed: High
Connection: via Hub
Type: Adaptive
Frequency: 44100 Hz
Format: S_16LE
Rates: 48000, 41000
Feedback Format: None
Interval: unknown

I've been searching the internet for days now, without a solution. Can anyone please point me in the right direction.

Thank you very much for your help.

[Man in a van]

Well 5 mins and Google lead me to think you are kippered;


2nd para' down

http://app.audiogon.com/listings/poppul ... kii-dac--2

atb

Ronnie

[Willefg]

Thank you, but as I said in my post:

I tried the same DAC with iPeng HD on an iPad with the CCK directly and then I get up to 24/96, the iPad's limit.

Just as an extra test I tried the Poppulse DAC on a Windows 7 laptop with Squeezeplay installed. I don't have any indications on the DAC to see what rate it is using through USB, so I trust on iPeng HD playing track info. Playing a 24/192 track through the DAC from the Joggler states downsampling to 705 kbps, same track through the DAC from the iPad states downsampling to a higher 24/96 bitrate and no downsampling when played from the Windows laptop.

I cannot explain that if the CM108 is only capable of 44,1/16. However, as Poppulse information states the PCM1796 Mk II doesn't use the DAC part of the CM108. Instead, it uses its converted I2S data stream from the USB to feed the actual DAC chip.

My knowledge does not stretch far enough to know whether the CM108 I2S is capable of passing through hires data stream to a different DAC. With what I experienced with the different playing devices, it seems to be the case.

Brings me back to my original question: How can I get 24/192 from the Joggler?

[Man in a van]

Have you installed this patch for hi-res files on SPOS

courtesy of Wilberforce;

SSH into Joggler,

Code: Select all

sudo apt-get update
sudo apt-get install patch

Code: Select all

    cd /usr/share/perl5/Slim/Player
    sudo wget https://raw.github.com/terual/slimpy/master/192kHz.patch
    sudo patch < 192kHz.patch

atb

Ronnie

[Willefg]

Thank you.

I'm trying. First part getting updates and installing seemed to work. Next part gives an issue. There seems to be no Slim directory in /usr/share/perl5/
Any idea what next?

[Man in a van]

Sorry, but I'm the monkey with his hands over his eyes when it comes to this stuff.

When I get a problem I Google for information and try stuff, mostly involving going back to the beginning with a clean install which often seems to work.


Have a read of this page,

http://www.jogglerwiki.com/forum/viewto ... l&start=80


atb

Ronnie.

[Willefg]

Seems, in the end, your initial reply was spot on. The DAC is only 16bit/48 kHz MAX.
I was misled by Logitech Media Server's UI through my iPad using iPeng HD. When streaming from the LMS to the Joggler/SqOS, "More Info" from the played HiRes (24bit/192kHz) song stated that LMS was downsampling to FLAC @ 705 kbps. However, when playing the same song to the same DAC through the iPad using the Camera Connection Kit, the info would state LMS downsampled FLAC @ 24bit/96kHz. doing the same from a Windows 7 laptop stated no downsampling at all.
That's what made me believe the DAC was capable of more.

Now, I think that I was misled and that LMS was downsampling to the capabilities of the actual streaming device's sound card (Joggler, iPad, Laptop) and those devices in turn downsampled to the capabilites of the DAC. Therefore, that wasn't visible in iPeng when using the iPad and the Laptop.

I write this so others that are as stubborn as I am, can benefit from it

[Man in a van]

When streaming from the LMS to the Joggler/SqOS, "More Info" from the played HiRes (24bit/192kHz) song stated that LMS was downsampling to FLAC @ 705 kbps.

Now that you say that, I have seen this before,on my Touch, and I think It is some kind of bug, but I can't remember the detail or if it is a false memory.

The Squeezebox forum is also a good source of information as a lot of the hitches people experience are not Joggler specific.

Glad you're sorted now and start saving for another DAC (Kippers can be tasty lol

atb

Ronnie

[Willefg]

I'm not sure if it is a bug. I can imagine it isn't. When, for instance, the iPad and the Windows 7 laptop both receive the original stream from LMS and "they" decide for themselves that the stream needs to be downsampled in order to communicate with the DAC with whom they communicate, then it makes sense that LMS doesn't state any downsampling or only downsampling to the limits of the device it directly communicates with. In my cases 24/96 to the iPad and 24/192 to the laptop.

Nevertheless, I ordered a XMOS USB to SPDIF converter to place between the Joggler and the DAC. Just have to wait a couple of weeks to start testing that....

[Man in a van]

Nevertheless, I ordered a XMOS USB to SPDIF converter to place between the Joggler and the DAC. Just have to wait a couple of weeks to start testing that...

Good news, which one? (if you care to share) let us know how you get on. Xmos chips seem quite Joggler friendly

atb

Ronnie.