<style>@font-face{font-family:Calibri;panose-1:2 15 5 2 2 2 4 3 2 4;}</style><font face="Calibri"><p dir="ltr">There are very few 24KHz DACs available, plus with pwm you can kind of get a dac for the cost of a simple r/c network. There's nothing to stop you using a 16 bit DAC, but you'd need FPGA pins to drive it, so why not skip it completely?</p>
<p dir="ltr">ALso , as it's 8 voice poly, you'd need 8 dacs, as opposed to 8 mins on the FPGA. </p>
<p dir="ltr">So I suspect it's a cost thing to be honest, but personally as an engineer I see it as my job to remove excess parts where not needed, if a board doesn't need a part, why go through the hassle of adding it?</p>
<p dir="ltr">Paula</p>
<br><br>On 23 April 2017, at 16:06, Andy Drucker <andy.drucker@gmail.com> wrote:<br><br><br></font><div dir="ltr">I'm trying to understand, in the NCO architecture being discussed (tentatively as we don't have exact details from Novation), is the choice to use a 1-bit DAC forced on us by other aspects of the design such as the very high (96MHz) sample rate? <div><br><div>If not, is it a cost issue, and is it likely to be perceptibly worse (to some ears) than alternatives?</div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Apr 23, 2017 at 2:28 AM, Mrs Paula Anne Maddox <span dir="ltr"><<a href="mailto:paula@synth.net" target="_blank">paula@synth.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I had lots of customers who said 002 sounded more analogue than 008, which was odd, but that's people's ears for you.<br>
<div class="HOEnZb"><div class="h5"><br>
<br>
On 23 April 2017, at 05:31, David G Dixon <<a href="mailto:dixon@mail.ubc.ca">dixon@mail.ubc.ca</a>> wrote:<br>
<br>
> Question on the Novation NCO thing: In the video I saw they<br>
> are going out of their way to imply without saying directly<br>
> so that an NCO is somehow more "Analog" than other digital<br>
> oscillators - is there anything to this?<br>
<br>
It's because the sampling rate is 96MHz, or about 2000 times faster than<br>
your typical digital oscillator, so there is no digital character to the<br>
output. At least, that's what I got out of it. What I know about digital<br>
oscillators could be explained in about 96 microseconds.<br>
<br>
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