Hi The info about Dave's plan to look in to the possibility to create a 16 channel sound card for the BeagleBone triggered me to start rethinking on how to Get a more portable solution for recording with my coresound microphone. ( And I am cheap and likes to fool my self that to build it is more cost effective than buying expensive )
After a bit of Google usage, it seems difficult to create a Firewire interface or add cardbus or expresscard to a BeagleBone ( or other arm board) to use with my MOTU traveler MK3, I got another idea! It is possible to get the MOTU Traveler MK3 to output the 4 Mic Inputs channels from the coresound mic to the 2 SPDIF interfaces it has. To me it seems possible to create a cape with dual spdif interfaces that would make it possible to record 2 spdif stereo streams with a beagle bone. The chip below uses I2S interfaces, and I suspect it is possible to find linux drivers for this chip. http://www.diyaudio.com/forums/digital-source/10745-crystal-cs8415-receiver.html http://www.cirrus.com/en/pubs/rdDatasheet/cs8415A_eb-2.pdf As usual I do not have the competence to create this my self :-). Any comments? - Bo-Erik -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Dave Malham Sent: den 5 juli 2012 16:16 To: Surround Sound discussion group Subject: Re: [Sursound] preferred (small) linux distro for audio? Not yet, I'm just testing the waters, so to speak, at present. I'm hopefully going to be doing some preliminary tests over the summer, but I won't be able to start serious work until late autumn as I don't retire till the end of September. I won't put up the Kickstarter page until I have a clearer idea of timescales as I would want to be sure I can deliver what I promise on it :-) Dave On 05/07/2012 15:03, umashankar manthravadi wrote: > where do i sign up. have you started a kickstarter page? umashankar > > i have published my poems. read (or buy) at http://stores.lulu.com/umashankar > > Date: Thu, 5 Jul 2012 14:57:07 +0100 >> From: [email protected] >> To: [email protected] >> Subject: Re: [Sursound] preferred (small) linux distro for audio? >> >> It will be balanced - not looking at anything else, especially as all >> dacs of any quality have balanced outs. My initial thoughts for a a >> Kickstarter reward structure is to do the usual special for early >> adopters which would, in this case, be what amounts to a cape (I'm >> wary of doing an actual cape as that might mean too much noise >> coupling from the CPU board into the analogue side of things) with >> people people who invest more getting the Beaglebone as well. Only in the >> second tranche would the dedicated CPU come out though whether on the same >> board or as a second board, I'm not sure yet, for the same reason as given >> above on noise coupling. >> >> Current thoughts have connectors for the audio on 25 pin D types (a >> la Tascam etc.) so that they can either go direct to an off-the-shelf >> loom which plugs into your amps/speakers. Alternatively the >> board(s) could go into a rack unit with connections from the D types >> to xlr's on the back (or front) of the unit - this might include dedicated >> balanced line drivers to extend the usable range. >> >> Dave >> >> >> On 05/07/2012 14:41, Hugh Pyle wrote: >>> +1. If you design a BeagleBone cape with 16 channels out (balanced >>> +or >>> not, I don't really mind), or a dedicated system that includes the >>> CPU, I'll want several :-) >>> >>> On Thu, Jul 5, 2012 at 8:16 AM, GP <[email protected]> wrote: >>>> Put me on your pre-order list already Dave! :-). >>>> >>>> Cheers Garth >>>> Sent on the Move >>>> >>>> On 05/07/2012, at 19:48, Dave Malham <[email protected]> wrote: >>>> >>>>> Wow! Fantastic response .. lots to think about. Will let you know how I >>>>> get on. Part of the problem is hardware as I was unable (at the time I >>>>> got this board) to find a case with a HD Audio front panel so it >>>>> currently thinks it's running in AC97 mode, but I'm going to knock >>>>> something up to get round this. In the mean time I'm going to play with >>>>> the suggestions people have made (Puppy is currently booting). >>>>> >>>>> I'm also interested in the paper that Fernando gave us a link to. >>>>> Although I don't want to use the Mamba hardware, I _am_ interested in the >>>>> possibilities for a dedicated multichannel player for installation work >>>>> (another retirement project!) What I'm looking at at present is a >>>>> multichannel dac linked directly (not via USB or owt like that) to an Arm >>>>> processor that'll just play a multichannel file off of a USB stick or SD >>>>> card. For prototyping I'll be using a BeagleBone (as I definitely don't >>>>> want the extra bells and whistles of the BeagleBoard itself) - I'd prefer >>>>> to use the RPi but the chip used (at least, according to the manual) >>>>> appears to have a crippled McASP port that can only handle stereo, >>>>> whereas the ARM on the BeagleBone has a good enough implementation of >>>>> McASP that it can do 16 channels at 48k for definite (EAOE) and probably >>>>> up to 96k without too much trouble. If initial tests prove the concept, >>>>> I'll look KickStarter funding. The idea is to have an absolutely rock >>>>> solid box that just plays stuff without any of the hassles of systems >>>>> relying on computers (ha! That'll be the day)) The most it would have is >>>>> an on/off switch and play controls - but it would output up to 16 >>>>> channels, balanced, 24 bits. >>>>> >>>>> Dave >>>>> >>>>> >>>>> On 05/07/2012 07:50, Fernando Lopez-Lezcano wrote: >>>>>> On 07/04/2012 06:40 PM, Marc Lavallée wrote: >>>>>>> Fernando Lopez-Lezcano<[email protected]> a écrit : >>>>>>> >>>>>>> Single board computers are interesting platforms to create >>>>>>> dedicated ambisonic players. >>>>>> Indeed! >>>>>> >>>>>>> Let us know how the beagle board perform with a port of Planet >>>>>>> CCRMA. ;-) >>>>>> I will, I just have to find the time to test. I'm curious whether a >>>>>> small box like that can drive 1/2 of the Mamba box I was driving from a >>>>>> regular desktop. 32 channel playback through an ethernet port[*]... >>>>>> >>>>>> -- Fernando 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
