Just for info, I'm working on a dam version to fit directly onto a Raspberry Pi, with flexible power supply, "ATX" style power management and direct display connection. Will also have alternative I2S connector for odroid.
No soldering needed, perfect for making a R-2R RaspTouch....
No soldering needed, perfect for making a R-2R RaspTouch....
Bring it on 🙂
I2S direct sounds just as good, if not better than the "flawed" USB from rpi 🙂
I2S direct sounds just as good, if not better than the "flawed" USB from rpi 🙂
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what about software as im more worried about the software which will do kernel streaming. Which one are you using?
I am using picoreplayer and/or archphile.
Picoreplayer needs one instance of Logitech Media Server installed somewhere in your LAN.
https://sites.google.com/site/picoreplayer/home/news
Archphile - Yet Another Archlinux Based Audiophile Distribution for Raspberry Pi, Udoo, Cubox-i and Odroid C1+/C2
Like those best.
Other distros are for instance:
runeaudio
volumio
moode
Tried them all many times.
There are however one diyaudio thread that is dealing with DAM and linux.
http://www.diyaudio.com/forums/digital-line-level/271734-linux-servers-soekris-dam1021.html
Picoreplayer needs one instance of Logitech Media Server installed somewhere in your LAN.
https://sites.google.com/site/picoreplayer/home/news
Archphile - Yet Another Archlinux Based Audiophile Distribution for Raspberry Pi, Udoo, Cubox-i and Odroid C1+/C2
Like those best.
Other distros are for instance:
runeaudio
volumio
moode
Tried them all many times.
There are however one diyaudio thread that is dealing with DAM and linux.
http://www.diyaudio.com/forums/digital-line-level/271734-linux-servers-soekris-dam1021.html
Kernel streaming = Windows OS. It is not applicable to Linux systems, like the ones running on the RPi.
Like bambadoo said, on the RPi you need to pick the distribution that sounds best to you.
I have a dual secondary trafo with 9V so I have a doubt that using a external rectified power supply I am giving about +/-13.5V and its running well with 15V as max rated for DAM. When I see the trafo with AC 9V then multiplied with 1.414 we get about 12.72V which is less than 13.5V so but why is it mentioned as 8V max in dam? any reason behind it? or can we use 9V dual secondary trafo?
I wouldn't use 9V trafo because of safety issues.
What is your primary (house) voltage?
In my home it can vary +-10% from the nominel 230V... according to the electrical company. It will be tight tolerances for delicate electrical components.
What is your primary (house) voltage?
In my home it can vary +-10% from the nominel 230V... according to the electrical company. It will be tight tolerances for delicate electrical components.
230V.
even if you consider 10% of variation then it will be 14.14 which is still in limits.
If the trafo spits out excactly 9V at 230V. It may just as well give ~10-10.5V at 230V. Some variations there.
And some spikes can occur.
Why keep it on the limit? I am sure there are other considerations also.
And some spikes can occur.
Why keep it on the limit? I am sure there are other considerations also.
I think it might sound better than USB but does raspberry pi 3 outputs the DSD via i2s?
I think the sound might better than USB mainly because its bypassing the usb controller and as many say USB is plagued by noise.
From a 9 VAC Xformer you can reach close to 16VDC depending on the input voltage as said bambadoo, plus the Xformer voltage regulation. Designed for 9 V at the nominal current, voltage can go up 10% or 15% or even worse with lower current, especially with tiny molded Xformers.
Laurent
Basically a R-2R DAC board based on the dam1021, sitting directly on top of the RPi board, to fit the RaspTouch case or some of the other Audiophonics cases. Will be a little larger than a RPi, and have what's needed for easy interfacing, t.ex. using the RPi I2S signals and serial port. Output will be RCA single ended buffered by LT1815's, which are powerful enough to also drive high impedance headphones.
See http://rasptouch.audiophonics.fr/
Routing signals from the RPi GPIO connector to another connector, to avoid soldering, two options:
1) Route power for the RPi 7" touch display.
2) Route power and RPi SPI signal for simpler displays.
Hi Søren,
That sounds interesting 🙂
Hopefully you can provide an option to also provide external power supply for the buffers and analog side.
You can easily provide power for the R-2R DAC board and Raspberry Pi through GPIO if you provide a full pass-through for the GPIO connector. That would cater for other SPI screens as well.
That sounds interesting 🙂
Hopefully you can provide an option to also provide external power supply for the buffers and analog side.
You can easily provide power for the R-2R DAC board and Raspberry Pi through GPIO if you provide a full pass-through for the GPIO connector. That would cater for other SPI screens as well.
