[sdiy] learning from other digital sdiy projects?

[Dan Snazelle]

the reason i need a high freq clock is for bit crushing/aliasing i want the sound to be able to start sounding NICE (or well sampled at a HIGH RATE) and then as the pot turns for it to get down to lower sample rates

but for qunatizing a much slower clock is better it seems

thanks




--------------------------------------------
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________________________________
> Date: Sat, 16 May 2009 15:17:49 -0400
> Subject: Re: [sdiy] learning from other digital sdiy projects?
> From: syntroniks at gmail.com
> To: subjectivity at hotmail.com
> CC: synth-diy at dropmix.xs4all.nl
>
> http://ecow.engr.wisc.edu/cgi-bin/get/ece/340/schowalter/opampckts.pdf
>
>
>
> Page 4 has it for an amplifier and a buffer. To bring it back to modular spec, I'd AC couple it to another amplifier of fixed gain and have an attenuator out. I think some of this depends on What conversion chips you are using. I have a nice parallel quad 8-bit DAC which is SO easy to use, I think it may be from either TI or maxim-ic. Like I said, what chips are you using?
>
>
>
>
> As for clock. Try a hex inverter. For higher speeds, 74HC may work. 400khz? Sounds excessive for audio work
>
> On Sat, May 16, 2009 at 11:03 AM, Dan Snazelle> wrote:
>
>
>
> hey there
>
> since i am having a few problems in my experiments with AD/DA converters, i thought it might be good to learn from some schematics
>
> which do a few things
>
> 1. take regular LiNE OUT audio from a soundcard or preamp and turn it into 0-5 audio for the ADC
>
> 2. add the proper offset at the output to bring it BACK to either modular audio levels or to LINE OUT levels
>
>
> 3. show a clock for getting up to HIGH sample rates (i think i need a clock that gets up 400khz)
>
>
> i know that a lof the PIC projects might need a clock, and i also assume they might need audio offset to 0-5 volts
>
>
> so if anybody can recommend some good projects to study, i would really appreciate it.
>
> i feel bad asking so many questions.
>
>
> my problem right now does NOT seem to be with the AD/DA chips but with the signal conditioning in and out and the clock.
>
>
> anyway...thanks for all your help
>
>
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