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24-bit audio DAC IC

G

Ghazan Haider

Jan 1, 1970
0
ATMEL recently released the AT89C51SND2C. Awesome for mp3 players,
cheap, features, low power, small. The only thing to be desired is a
better quality DAC.

Anyone here knows of a DAC or a complete MP3 decoder for audio with
SNR in excess of 100db, 24-bits and a sampling rate to match?

I'm thinking of something like the Audigy chip from creative, but for
embedded systems without the midi, memory, recording stuff. Anyone
knows?
 
C

Clifford Heath

Jan 1, 1970
0
Ghazan said:
Anyone here knows of a DAC or a complete MP3 decoder for audio with
SNR in excess of 100db, 24-bits and a sampling rate to match?

The Wavefront ADC, DAC and DSP's look good, and so did the equipment
that Alesis used to make from them. I haven't used them, but if you
do, let us know: <http://www.wavefrontsemi.com/>.
 
P

Pooh Bear

Jan 1, 1970
0
Clifford said:
The Wavefront ADC, DAC and DSP's look good, and so did the equipment
that Alesis used to make from them. I haven't used them, but if you
do, let us know: <http://www.wavefrontsemi.com/>.

I've used them.

They're fine.

AKM and TI ( Burr Brown ) makes some nice converters at comparable prices
too.


Graham
 
W

Winfield Hill

Jan 1, 1970
0
Ghazan Haider wrote...
ATMEL recently released the AT89C51SND2C. Awesome for mp3 players,
cheap, features, low power, small. The only thing to be desired is a
better quality DAC.

Available from Avnet (not in stock): minimum order 450 pieces at
$12.78 each = $5750, massive programming required, yes, that's
very attractive for a hobbyist. Maybe you can get samples. :>)
Anyone here knows of a DAC or a complete MP3 decoder for audio with
SNR in excess of 100db, 24-bits and a sampling rate to match?

I'm thinking of something like the Audigy chip from creative, but
for embedded systems without the midi, memory, recording stuff.

Creative uses a Cirrus Logic cs4398 24-bit 120dB dac in their E-MU
1212 and 1820 products, which have an em8810 board. That's a pretty
powerful new part, and Cirrus Logic older dacs may be easier to get.

For example, the cs4334 is a low-cost 8-pin soic 24-bit stereo dac
apparently with the same I2S format used in the Atmel AT89C51.
http://www.cirrus.com/en/products/pro/detail/P29.html In stock at
Newark for $2.01 each single pieces! The cs4334 family are drop-in
replacements for the older popular cs4330 family parts, no longer
manufactured, but widely available in the surplus chip market.
 
S

Stephan Goldstein

Jan 1, 1970
0
<snippage of discussion regarding the availability of 24-bit audio dacs
with 100dB SNR for use in MP3-players>....

Um, perhaps my question is a little obtuse, but *why*? I was under the
impression that MP3 was a lossy compression and that the sound quality
was not as good as a standard CD under the best of conditions. If true,
wouldn't a CD-quality audio dac be a bit of a waste?

Steve
 
W

Winfield Hill

Jan 1, 1970
0
Stephan Goldstein wrote...
<snippage of discussion regarding the availability of 24-bit audio dacs
with 100dB SNR for use in MP3-players>....

Um, perhaps my question is a little obtuse, but *why*? I was under the
impression that MP3 was a lossy compression and that the sound quality
was not as good as a standard CD under the best of conditions. If true,
wouldn't a CD-quality audio dac be a bit of a waste?

Well, maybe, maybe not. But given that Newark sells the 8-pin cs4334
24-bit stereo DAC for just $2.01 each (single pieces), why not?
 
A

Allan Herriman

Jan 1, 1970
0
<snippage of discussion regarding the availability of 24-bit audio dacs
with 100dB SNR for use in MP3-players>....

Um, perhaps my question is a little obtuse, but *why*? I was under the
impression that MP3 was a lossy compression and that the sound quality
was not as good as a standard CD under the best of conditions. If true,
wouldn't a CD-quality audio dac be a bit of a waste?

You may want to implement a digital volume control, in which case the
volume control range gets subtracted from the dynamic range of the
DAC.

Regards,
Allan
 
C

ChipSleuth

Jan 1, 1970
0
Any idea how makes Sandisk's MP3 player for them? Or, who makes the
controller chip? I do not think its Sigmatel, but I am not sure. It
might be Philips or Texas Instruments, but cannot seem to get
confirmation of this. Anybody know??
 
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