Continuous Sound Playing IC
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From: CCD on 28 Jul 2008 04:03 On Jul 28, 12:52 pm, "Jon Slaughter" <Jon_Slaugh...(a)Hotmail.com> wrote: > > Supposedly the pic32's have a lot of audio features(such as decoding) and > work well for sound. Would be easy to set something up to use if you have > used them before. Just an option though. Hi, thanx, but I've used 8/16-bit controllers only, and besides, this circuit is required to be cost-effective and quick to build
From: donald on 28 Jul 2008 09:39 CCD wrote: > On Jul 28, 12:52 pm, "Jon Slaughter" <Jon_Slaugh...(a)Hotmail.com> > wrote: > >> Supposedly the pic32's have a lot of audio features(such as decoding) and >> work well for sound. Would be easy to set something up to use if you have >> used them before. Just an option though. > > Hi, > thanx, but I've used 8/16-bit controllers only, and besides, this > circuit is required to be cost-effective and quick to build Are there any other requirements you are looking for that you did not mention in your first post ?? Any micro with a DAC output may work for you: http://focus.ti.com/mcu/docs/mcusupporttechdocsc.tsp?sectionId=96&tabId=1502&abstractName=slaa123 The APR9600 seems to be bandwidth limited anyway, so your "music" may not be real clear. good luck donald
From: CCD on 28 Jul 2008 09:14 On Jul 28, 6:39 pm, donald <Don...(a)dontdoithere.com> wrote: > Are there any other requirements you are looking for that you did not > mention in your first post ?? > > Any micro with a DAC output may work for you: You mean, first convert the voice into digital using an ADC than store it into EEPROM and while playing it keep sending EEPROM data to DAC?? that will ask for a huge EEPROM even for 30 sec (may be >1Mb, if i sample at 50k). Though i've nevr tried audio signals on ADC/DAC, i can try this one, but isn't there some simpler solution with inbuilt DAC +memory+ADC???
From: CCD on 28 Jul 2008 09:26 On Jul 28, 5:47 pm, mpm <mpmill...(a)aol.com> wrote: > How many of these do you need? > Are you developing a new product, or just trying to solve a one-off > type problem. > > If the latter, Google search "Digital Audio Repeaters". > > I do know that Eletech has a model that will do exactly what you want, > right off the shelf, at fairly reasonable pricing. Recognizing that > "reasonable" means different things to different folks. > > http://www.eletech.com/Products/products.htm > > Eletech also has a QuickVoice chip set available. > Been a long time since I played with them. > > Good luck. The Eletech models look quite big! m thinking of a small PCB which can fit into a toy kind of thing. At the moment i need less than 10 to be fitted in a local store for playing continuously a theme music, which may be required to change later.. Thanks.
From: Joe G (Home) on 28 Jul 2008 11:29
"CCD" <friendly_yours_c(a)yahoo.co.in> wrote in message news:b4b8ee81-6b55-4390-b23b-510f7b7a346a(a)i76g2000hsf.googlegroups.com... On Jul 28, 6:39 pm, donald <Don...(a)dontdoithere.com> wrote: > Are there any other requirements you are looking for that you did not > mention in your first post ?? > > Any micro with a DAC output may work for you: You mean, first convert the voice into digital using an ADC than store it into EEPROM and while playing it keep sending EEPROM data to DAC?? that will ask for a huge EEPROM even for 30 sec (may be >1Mb, if i sample at 50k). Though i've nevr tried audio signals on ADC/DAC, i can try this one, but isn't there some simpler solution with inbuilt DAC +memory+ADC??? It's more than DAC+Memory+ADC........ how is the memory controlled....... how will you clock the address lines of the memory and detect the end and loop arround? have you looked at a 64kx8 memory? how any data lines , how many address lines.... how will you clock the address lines.. A micro can take care of all this logic. Joe |