Maybe you could team up with this guy? http://www.diyaudio.com/forums/digital-line-level/252769-my-dsp-dac-build-5.html He has already made a layout for the DAC that migh be of use...
-Bosse -----Original Message----- From: Sursound [mailto:[email protected]] On Behalf Of Dave Malham Sent: den 16 april 2014 18:18 To: Surround Sound discussion group Subject: Re: [Sursound] Inexpensive USB multichannel sound card For low cost multi-channel players with decoding and eq, it might be worth investigating the ADAU1702 which is a complete single-chip audio system with a 28-/56-bit audio DSP, ADCs, DACs, and microcontroller-like control interfaces. It has 4 channel DAC's and 2 channel ADC's built in - plus you can interface others. About 8 dollars in one offs. Alternatively, as I have mentioned before, the ADAU1966 16 channel very high quality DAC coupled with a Beagle Bone (or Board) would not be tooo expensive. I actually have the bits to try it out but I'm too busy practising being retired ( and collecting Wharfedale Diamond V's) :-) Dave On 16 April 2014 11:31, Bo-Erik Sandholm <[email protected]>wrote: > > I have surfed around and pondered on how to create a low cost DIY > multichannel sound outputs... > > Ethernet to MADI ?? can it be done ? > > http://en.wikipedia.org/wiki/MADI > http://comments.gmane.org/gmane.comp.audio.sursound/3076 > http://groupdiy.com/index.php?topic=35486.120 > > OR use protocol for audio over Ethernet? > http://www.supermac-hypermac.com/ > Royalty-free implementations available as Xilinx FPGA cores > > DIY MADI to ADAT > http://madi.webklik.nl/page/madi > http://groupdiy.com/index.php?topic=35486.600 > > > Use to this to interface directly to Ethernet or a RPi or maybe USB? > http://www.xmos.com/en/startkit#D1WEaWZP > > > 10/100 MII Ethernet MAC for XMOS microcontrollers > http://xcore.github.com/sc_ethernet/index.html > https://github.com/xcore/sc_ethernet > > Modules to receive and transmit ADAT streams > http://github.xcore.com/sc_adat/ https://github.com/xcore/sc_adat > > > http://www.diystompboxes.com/smfforum/index.php?PHPSESSID=aa2ced904ae4 > 77361c0eabd3c51c1908&topic=96073.20 > http://opencores.com/project,adat_optical_feed_forward_receiver > Or > > http://voxcaliber.com/is-dante-the-future-no-64-channel-digital-audio- > over-ethernet-is-already-here/ > > > > 8 channel DAC - use 2 or 3 chips - around 100db S/N > http://www.wolfsonmicro.com/documents/uploads/data_sheets/en/WM8768.pd > f http://www.wolfsonmicro.com/products/dacs/WM8768/ > http://www.wolfsonmicro.com/documents/uploads/misc/en/WAN0149.pdf > Layout > http://www.wolfsonmicro.com/documents/uploads/misc/en/WAN0129.pdf > Stereo DAC better data > http://www.wolfsonmicro.com/documents/uploads/data_sheets/en/WM8740.pd > f > > > http://www.cirrus.com/en/pubs/proDatasheet/CS4397_F1.pdf > > USB to I2S + DAC stereo 97$ > http://www.silabs.com/products/interface/Pages/CP2114-WM8523EK.aspx > > Interesting DIY DAC > http://www.audiodesignguide.com/DAC_final/DacFinal.html > http://www.cirrus.com/en/products/cs4398.html 8 channels 117 db s/n > > Just a few places where it might be possible to find entry point if > not everything is to be created out of nowhere. > > Bo-Erik Sandholm > Stockholm > ---------- > > http://www.xmos.com/en/startkit#D1WEaWZP > > > http://www.diystompboxes.com/smfforum/index.php?PHPSESSID=aa2ced904ae4 > 77361c0eabd3c51c1908&topic=96073.20 > > > > -----Original Message----- > From: Sursound [mailto:[email protected]] On Behalf Of > Sampo Syreeni > Sent: den 14 april 2014 22:21 > To: Surround Sound discussion group > Subject: Re: [Sursound] Inexpensive USB multichannel sound card > > On 2014-04-13, Ross Bencina wrote: > > > I am ignorant of the economics, but perhaps it is worth considering > > an FPGA-based implementation: > > > > "An FPGA-based Re-configurable 24-bit 96kHz Sigma-Delta Audio DAC" > > Ray C.C. Cheung et al. > > Worth a look because I'm not *too* well educated about the economics > either, but my hunch is, that'd prove costly overkill. 1-4 channel > high quality converters are already available as bulk product, at very > low cost (to the tune of well under a buck per channel). What you > really need after that is just the interface and synch circuitry, and > whatever you need on the analog side for its interfaces, noise-free > reference voltages, stable, low-jitter clocking and whatnot. Something > like that doesn't take high end components like tightly integrated > FPGA's and their support circuitry, but at most tightly integrated > opamps, fuze programmable PAL/GAL/CPLD, and the ilk. > > Of course the rationale is much the same as with FPGA's -- the chip > types I mentioned are basically just the smaller brothers of FPGA > after all -- but the price point is much, *much* lower, in concordance > with the lesser amount of stuff you have to implement yourself once > the basic, hardest D/A stuff and even most of the interface logic was > already bought in bulk, and since in this sort of an application, you > really don't require reprogrammability (which takes at least an order > of magnitude away from the cost). > > Now, this is obviously just another one of my wild ideas. It's highly > unlikely I would be in the position to try it out, at least any time soon. > There's still a rather hefty base investment when you do something > like this. But sorta, kinda, I believe the basic economics ought to > pan out; I don't think even ridiculous channel counts are mainly hard > today because of the cost of production, but because of the low demand > and the amortization problems it causes. If so, something like this > would be one helluva match with circuit design class projects, > Kickstarter-like nerdy crowdfunding, or the kind of hobbyist/researcher > ecosystem we have even on this list. > -- > Sampo Syreeni, aka decoy - [email protected], http://decoy.iki.fi/front > +358-40-3255353, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2 > _______________________________________________ > Sursound mailing list > [email protected] > https://mail.music.vt.edu/mailman/listinfo/sursound > _______________________________________________ > Sursound mailing list > [email protected] > https://mail.music.vt.edu/mailman/listinfo/sursound > -- As of 1st October 2012, I have retired from the University. These are my own views and may or may not be shared by the University Dave Malham Honorary Fellow, Department of Music The University of York York YO10 5DD UK 'Ambisonics - Component Imaging for Audio' -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20140416/64c8fdfd/attachment.html> _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound
