<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Ah, here it is - the Synclavier way of doing it!<div class=""><br class=""></div><div class=""><a href="http://www.500sound.com/SyncII/synthschem.jpg" class="">http://www.500sound.com/SyncII/synthschem.jpg</a><br class=""><div class="">
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<div><br class=""><blockquote type="cite" class=""><div class="">On 4 Aug 2024, at 23:23, Mattias Rickardsson <mr@analogue.org> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="auto" class=""><div dir="auto" class="">Interesting thread.</div><div dir="auto" class=""><br class=""></div>Do these vintage examples use static amplification factors in their MDACs, or do they allow the digital value be modulated by envelopes and LFOs?<div dir="auto" class=""><br class=""><div dir="auto" class="">If they do modulate stuff, how is the result in terms of zipper noise etc? Unlike when using a VCA controlled by a CV generated from the very same DAC, there is no way of smoothing out the digital irregularities in the MDAC case. Only perhaps keeping the sample rate above audio (which they probably didn't do by then) or to use clever noise shaping techniques (which also seems unlikely).</div><div dir="auto" class=""><br class=""></div><div dir="auto" class="">/mr</div></div></div><br class=""><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Den sön 4 aug. 2024 20:48Gordonjcp <<a href="mailto:gordonjcp@gjcp.net" class="">gordonjcp@gjcp.net</a>> skrev:<br class=""></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Sun, Aug 04, 2024 at 06:26:06PM +0100, Tom Wiltshire wrote:<br class="">
> The Synclavier used DACs for VCAs like this too, fed with audio from other DACs. In that case it was a way of avoiding doing multiplies in hardware and not losing any resolution.<br class="">
> <br class="">
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The Ensoniq DOC chip uses the same trick for the same reason.<br class="">
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-- <br class="">
Gordonjcp<br class="">
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