Linux servers and Soekris DAM1021

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#2
Another member here suggested,

"The settings outlined in here
https://volumio.org/forum/es9018k2m-based-streaming-solution-t2087.html
with an ESS K2M and Volumio 1.51 and it worked with the Soekris - I simply connected the i2s to pins 12, 35, 39 & 40".

It did not work for me on the rpi 2 but it may work on the earlier models.
It also seems that Volumio, Rune, and Archphile will not play 16 bit over i2s. I changed bit depth to 24 on a few tracks with sox and they worked after. Unfortunately they sounded worse for the extra processing.

I loaded piCorePlayer to Rpi 2, set up i2s, and connected to Logitech Media Center online and it worked like a charm. Easy instructions here, including i2s setup:
https://sites.google.com/site/picoreplayer/home/how-to-1

Also another member has endorsed Voyage MPD:
Voyage MPD | Voyage Linux
It requires a linux computer to set up. I will be excited to try it!
 
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#6
I did not manage to connect to the dam1021 with UART from the GPIO with raspberry pi2. I think it is because that the rs232 in the DAM needs 5v. The rs232 from Raspberry is 3.3v.
Søren said that next firmware would fix this.

But an usb-serial adapter in the RPI worked fine with the DAM.
Using minicom as "emulator".
"pacman -S minicom" - if you got an arch distro.
Here is a good description
Serial on Raspberry Pi Arch Linux | Dan's Website
 
#9
I followed the instructions in the post by Tony on this page using the latest Volumio image, but got the error message below in mpd.conf:

https://volumio.org/forum/es9018k2m-...ion-t2087.html

...
ALSA lib pcm_hw.c:1667_snd_pcm_hw_open) Invalid value for card
Mar 20 19:16 : alsa_output: Failed to open "Output" [alsa]: Failed to open ALSA device "hw:0,0": No such file or directory
Mar 20 19:16 : output: Failed to open audio output
Mar 20 19:16 : player: problems opening audio device while playing "USB/01-Hotel California.flac"
....
 
#11
Rpi -> USB -> Gustard u12 (xmos based) -> i2s (lvds hdmi signal) -> dam1021 (lvds receiver hdmi_interface)

I am using archphile and runeaudio (like them better than volumio)
That works very nice indeed 🙂
Havent tried the internal i2s out from rpi yet.

rpi i2s direct from GPIO. Does it handle every samplerate? I have read that it has some limitiations caused by the internal clock?
 
#13
bambadoo said:
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Click to expand...

I like a few things about Runeaudio too, but they have fallen behind on their releases a bit and Volumio runs on Raspbian which would have been easier with some of my add ons, so I chose Volumio first. I'll be trying Runeaudio next.

A friend of mine has got RPi GPIO I2S out with Volumio, with no isolator or reclocker, playing very well, albeit it being with a different dac. SQ far exceeded my expectations. I didn't hear him complain about unsupported bitrates, but I'll ask.
 
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#15
Squeezelite supports all these sampling rates if the output device supports them. I too believe that the I2S output of the RPi only goes up to 192K but I can't say for sure since I can't remember trying very high sampling rates (with a direct I2S connection).

Btw, Squeezelite also supports DSD output (when working with a very new (nightly) build of the LMS server), which is a very nice feature..
 
#16
Warning! - Windows content

I know many of us like to experiment on OS we are more familiar with trying to learn the principles before diving into the unknown.
As Windows user I struggled making a working shortcut for the headless SqueezeLite. Until I realized that on Win7 the startup arguments in shortcuts differ to batch files as one need to separate multiple arguments with comma.

This might give you a head start to the headless player. Like me you might move on to Linux after experiencing how well SqueezeLite performs.
"C:\Programmer\squeezelite-win\squeezelite-win.exe" -o 3, -n MySqueezeLite, -s 192.168.1.200
 
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#18
I have gotten all of the images running but none of the Raspyfi group (volumio/rune/arch) will play 16 bit material. The DAM won't lock. Sample rate doesn't matter, it is a problem with bit depth. Anyone else have this working with the Raspberry Pi 2?
 
#19
DEQ+TheEnd said:
As Windows user I struggled making a working shortcut for the headless SqueezeLite.
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Click to expand...

Just curious, how are you guys with picoplayer and squeezelite controlling the player when headless? Volumino and Rune have smartphone UIs that would mean you could have a server/DAC combo and not need to turn on a computer to control it. Of course, I want it all. Smartphone interface, headless server, and 24 bit, high sample rate playback 🙂, preferably direct I2S.

Also, any thoughts on different board computer choices? Someone on another forum commented that the RPi was busy on the USB side with music data (for a USB DAC), data from the HDD (if USB hard drive), and wireless dongle for communicating with the UI. Perhaps, that was a cause of glitches some folks find. That got me thinking that a more expensive board, maybe with a SATA connection and built in wireless would be worth the trip. Of course, you guys are pointing out the problems with new platforms and software.

Thanks.

PS Robert - Thanks for starting this thread. It's a great idea.
 
#20
lehmanhill, I'm deep into LMS (Logitech Media Server) with several Touch devices. SqueezeLite connects to this service as any of Logitech’s devices.

Remote control are available from several apps on Androids & iPad. For some reason I seem to come back to the official Logitech release on Android.

LMS is controlled from web interface on port 9000

LMS have had many years to mature. As have I with it.
 
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