Thought you just might have meant that :-)
DaveOn 10/07/2012 02:24, Marc Lavallée wrote:
I meant: "one D/A conversion" I wrote:It's possible to skip the A/D conversion by using amplifiers with digital inputs. Texas Instruments have a 8 channels digital to PWM converter that can drive D-class amps with PWM inputs; that means only one A/D conversion, done by the speaker... http://www.ti.com/product/TAS5508C Marc Wed, 25 Apr 2012 15:51:02 +0100, Dave Malham <dave.mal...@york.ac.uk> a écrit :Hi Marc, True, I'm sure you could use a usb interface, but even a low cost multichannel unit would be quite a lot more expensive (and, probably, power hungry) than the PI whereas Analog Devices (for instance) do a 16 channel, 24 bit, 192kHz DASC IC for around 10 ukp (ADAU1966) which would probably need around another 20 quid's worth of op-amps and other bits to get going properly. Much more in the maker tradition - and a possible product. Dave PS total number of pre-orders for PI's have reach 350,000! PPS I'm not connected with them at all, I've not even ordered one! On 24/04/2012 18:33, Marc Lavallée wrote:The snd_bcm2835 driver is for the integrated stereo sound module. For more channels, a cheap 8 channels USB sound module would probably work, and ALSA drivers for many sound modules are stable. Martin Leese<martin.le...@stanfordalumni.org> a écrit :Dave Malham<dave.mal...@york.ac.uk> wrote:The Raspberry PI is really cheap and runs Linux, so it does provide some real possibilities, though it is, in some ways, quite limited - max 256m ram at present, for instance -...it seems that the SPI pins are available on a standard header so shouldn't be too difficult physically to add DAC's or ADC's (since most use that interface), though how easy it would be to write the drivers, I don't know.The Arch Linux ARM image (operating system) contains an ALSA driver. However, it states: "The alpha-quality ALSA driver included in this release is disabled by default. Type modprobe snd_bcm2835 to enable it." Regards, Martin_______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
-- These are my own views and may or may not be shared by my employer /*********************************************************************/ /* Dave Malham http://music.york.ac.uk/staff/research/dave-malham/ */ /* Music Research Centre */ /* Department of Music "http://music.york.ac.uk/"; */ /* The University of York Phone 01904 322448 */ /* Heslington Fax 01904 322450 */ /* York YO10 5DD */ /* UK 'Ambisonics - Component Imaging for Audio' */ /* "http://www.york.ac.uk/inst/mustech/3d_audio/"; */ /*********************************************************************/ _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
