<div dir="ltr"><div>Wow, and I thought noise was just to make hihats!</div><div>Only kidding, but what a depth of answers, I'm glad I asked. Lots of applications I never thought of before.</div><div>Cheers,</div><div>Colin<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Nov 10, 2019 at 7:47 PM <<a href="mailto:rsdio@audiobanshee.com">rsdio@audiobanshee.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">One advantage of a CPU-based noise source is that it can be combined with a DAC for CV modulation.<br>
<br>
Digital noise chips typically use the single-bit output for audio. Thus, it’s like a square wave with random period but basically constant amplitude. The conversion to analog can vary the amplitude if there is a PWM effect (via capacitance).<br>
<br>
With a CPU and a long enough register, it’s possible to gather 8 or more bits into a word to feed a DAC. Just be sure to shift in 8 new bits for each 8-bit conversion, otherwise the values aren’t entirely independent of each other. You can easily extend this to 16-bit or even a 24-bit DAC, although using a 24-bit DAC for CV is quite dubious. LFSR hardware should be able to run at 8x, 16x, or 24x the sample rate with no problems.<br>
<br>
Of course, with counter logic and a stand-alone DAC chip, it’s possible to do this in pure hardware. So, I guess the CPU doesn’t really have a unique advantage here.<br>
<br>
Brian<br>
<br>
<br>
On Nov 10, 2019, at 4:32 PM, bbob <<a href="mailto:fluxmonk@gmail.com" target="_blank">fluxmonk@gmail.com</a>> wrote:<br>
> sometimes for the sound directly (crunchy/brittle), but more often slowing the clock and then using it as a modulation source<br>
> <br>
> On Sun, Nov 10, 2019 at 7:11 PM ColinMuirDorward <<a href="mailto:colindorward@gmail.com" target="_blank">colindorward@gmail.com</a>> wrote:<br>
>> Hope this isn't too off topic, but I've often wondered when/why you'd choose a digital noise source over an analog one. It is simply for the acoustic flavour?<br>
> <br>
<br>
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