[sdiy] msgeq7 spectrum analyzer chip

[Noah Vawter]

On Apr 14, 2011, at 2:23 PM, Barry Klein wrote:

> How much?
> Did you go to www.mix-sig.com and ask them directly?
> Check out their other parts too.


wow, a smorgasboard of intriguing chips.

e.g. MSLOSC - 15 Hz to 64 kHz All Silicon Sine Source

very simple schematic:  http://i.imgur.com/E2nIN.jpg

Seems to include this capability "continuous time programmable lowpass  
filter"   (it's for aliasing reduction, not general purpose signal  
input)

this thing has a lot of registers!  Main clock divider, PLUS  
"Fractional Frequency Control"

OK, the filter is 20-bit selectable with attenuation from -40dB (I  
think)

It doesn't seem to have an "Amplitude" register, but perhaps the  
filter can attenuate the main signal enough to make the sound inaudible?






>
> Barry
>
>
> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl
> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of dan snazelle
> Sent: Thursday, April 14, 2011 11:02 AM
> To: dan snazelle
> Cc: synthdiy diy
> Subject: Re: [sdiy] msgeq7 spectrum analyzer chip
>
> woops
>
> they are much more expensive than i thought
>
>
>
> oh well
>
>
>
> On Apr 14, 2011, at 1:48 PM, dan snazelle wrote:
>
>> I thought for 2 bucks this looked like it might be a fun chip
>>
>>
>> http://bliptronics.com/manuals/MSGEQ7.pdf
>>
>>
>> http://bliptronics.com/item.aspx?ItemID=111
>>
>>
>> it analyzes 7 bands and puts out DC through a multiplexed output.
>>
>>
>>
>>
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>
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