I've been looking for a capable chip to do audio processing. I'm a hobbyist but I'm looking for something I could develop on and then take to (very) small scale production, it would serve as the FX processor in an audio amp. Mainly the dsPIC33 FJ128GP802 got my attention because it has a 16bit audio DAC on board. I would however like more RAM and even more processing power so I was looking at the AT91SAM7S256 board from Olimex, since it has more RAM, runs faster, has 32bit architecture (makes coding easier)... but lacks decent AD/DA (10 bit AD is a bit limited for audio). What would be the best way to get audio in and out of this chip?? Are there any codecs/converters you'd recommend that have SPI or I2C connectivity (the chip does not support I2S) Are there other chips I should be looking at? Remember, I want to stay away from SMT and prefer DIP, I'm hoping you know of someone who makes a header board (similar to the Olimex) with a good chip, needs at least 32kb RAM, and >40MIPS with A/D and D/A suited for audio, if I'm going to choose it over the dsPIC. The dsPIC http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en532298 The ARM header board http://www.olimex.com/dev/sam7-h256.html --------------------------------------- This message was sent using the comp.arch.embedded web interface on http://www.EmbeddedRelated.com
Audio with AT91SAM7
Started by ●November 27, 2009
Reply by ●November 27, 20092009-11-27
valdiorn wrote:> I've been looking for a capable chip to do audio processing. I'm a > hobbyist but I'm looking for something I could develop on and then take to > (very) small scale production, it would serve as the FX processor in an > audio amp. > > > Mainly the dsPIC33 FJ128GP802 got my attention because it has a 16bit > audio DAC on board. I would however like more RAM and even more processing > power so I was looking at the AT91SAM7S256 board from Olimex, since it has > more RAM, runs faster, has 32bit architecture (makes coding easier)... but > lacks decent AD/DA (10 bit AD is a bit limited for audio). > > What would be the best way to get audio in and out of this chip?? Are > there any codecs/converters you'd recommend that have SPI or I2C > connectivity (the chip does not support I2S)Circuit Cellar Ink has run a project built around a dsPIC33, using a T.I. PCM3060 for analog<->digital conversion. Details are under http://www.circuitcellar.com/microchip2007winners/DE/MT1518.html and ftp://ftp.circuitcellar.com/pub/Circuit_Cellar/2008/220/ . Mel.
Reply by ●November 27, 20092009-11-27
Op Fri, 27 Nov 2009 14:49:00 +0100 schreef valdiorn <valdiorn@hotmail.com>:> [...] but lacks decent AD/DA (10 bit AD is a bit limited for audio).Depends on your sample rate. Remember DSD?> What would be the best way to get audio in and out of this chip?? Are > there any codecs/converters you'd recommend that have SPI or I2C > connectivity > (the chip does not support I2S)SPI is nearly perfect for DSD. All you need is a clock generator for the input. -- Gemaakt met Opera's revolutionaire e-mailprogramma: http://www.opera.com/mail/ (remove the obvious prefix to reply by mail)
Reply by ●November 27, 20092009-11-27
"valdiorn" <valdiorn@hotmail.com> wrote in message news:MZSdnSDMPo1RRZLWnZ2dnUVZ_hmdnZ2d@giganews.com...> I've been looking for a capable chip to do audio processing. I'm a > hobbyist > but I'm looking for something I could develop on and then take to (very) > small scale production, it would serve as the FX processor in an audio > amp. > > > Mainly the dsPIC33 FJ128GP802 got my attention because it has a 16bit > audio > DAC on board. I would however like more RAM and even more processing power > so I was looking at the AT91SAM7S256 board from Olimex, since it has more > RAM, runs faster, has 32bit architecture (makes coding easier)... but > lacks > decent AD/DA (10 bit AD is a bit limited for audio). > > What would be the best way to get audio in and out of this chip?? Are > there > any codecs/converters you'd recommend that have SPI or I2C connectivity > (the chip does not support I2S) > > Are there other chips I should be looking at? Remember, I want to stay > away > from SMT and prefer DIP, I'm hoping you know of someone who makes a header > board (similar to the Olimex) with a good chip, needs at least 32kb RAM, > and >40MIPS with A/D and D/A suited for audio, if I'm going to choose it > over the dsPIC. > > > The dsPIC > http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en532298 > > The ARM header board > http://www.olimex.com/dev/sam7-h256.html > > > > --------------------------------------- > This message was sent using the comp.arch.embedded web interface on > http://www.EmbeddedRelated.comLook at STM32 Arm Cortex - latest parts have I2S for proper audio interface. ST offer free DSP and audio processing software to get started. All these chips are SM - just bite the bullet (insisting on DIP will hold you back). There are some cheap dev kits around. www.st.com Michael Kellett
