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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I thought that at first. One example I can think of is having a choir spread around a building such as a cathedral, where the different locations of the sopranos,
altos, tenors and basses, and of any soloists, would experience different reverberation, giving a greater sense of the size of the building to the overall sound.
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Also some of the best church organs were built placing different pipes in optimal locations to emphasise certain acoustic properties of the building.<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Synth-diy [mailto:synth-diy-bounces@synth-diy.org]
<b>On Behalf Of </b>ColinMuirDorward<br>
<b>Sent:</b> 22 March 2021 12:53<br>
<b>To:</b> Richie Burnett<br>
<b>Cc:</b> *SYNTH DIY<br>
<b>Subject:</b> Re: [sdiy] Cheapest good sounding digital reverb?<o:p></o:p></span></p>
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<p class="MsoNormal">Thinking more about this and wondering what would be the sonic difference between polyphonic reverb and "paraphonic" reverb.<o:p></o:p></p>
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<p class="MsoNormal">Unless each voice is using a different reverb, wouldn't they sound identical? A post-reverb VCA will change this, since you can have different notes gating on and off at different times, but this seems a high price to pay for a very subtle
effect. Polyphonic effects I would be chasing are delay, chorus, flange, pitch, etc; those which could take advantage of per-voice dynamic manipulations.<o:p></o:p></p>
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<p class="MsoNormal">At any rate, I'd love to hear anything that comes out of this, reverb or otherwise. There is probably lots to discover in this under-explored terrain.<o:p></o:p></p>
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<p class="MsoNormal">Colin<o:p></o:p></p>
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<p class="MsoNormal">On Mon, Mar 22, 2021 at 10:47 AM Richie Burnett via Synth-diy <<a href="mailto:synth-diy@synth-diy.org">synth-diy@synth-diy.org</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">A few general comments:<br>
<br>
1. High quality reverb requires a decent chunk of MIPS and RAM.<br>
2. Convincing small rooms with short reverb times are the hardest to do <br>
algorithmically.<br>
3. Different reverb algorithms needed for different sources. (More/less <br>
diffusion for percussive/pad sounds to trade off density & flutter against <br>
metallic ringing.)<br>
4. 16-channels (or 64 !?) is a _LOT_ of data bandwidth. Use DMA for the <br>
ADC/DAC/CODEC.<br>
<br>
You also need a decent size word-length for the storage and calculations. <br>
Early 16-bit reverbs were very noisy due to build up of quantisation noise <br>
within the algorithm due to feedback. Use at least 20-bit storage or that <br>
funky floating-point RAM that Keith Barr used for the delay memory. Or you <br>
might get away with noisy reverbs if you're gonna put a VCA (noise gate!) <br>
after it, but there will always be sounds like a deep mellow bass sound that <br>
will reveal "fizzy" quantisation noise because there's no HF content to mask <br>
it.<br>
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-Richie, <br>
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-- <o:p></o:p></p>
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<p class="MsoNormal"><a href="https://www.instagram.com/colinmuirdorward/" target="_blank">https://www.instagram.com/colinmuirdorward/</a><o:p></o:p></p>
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<p class="MsoNormal"><a href="https://www.instagram.com/colinmuirdorward/" target="_blank">-<br>
</a><o:p></o:p></p>
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<p class="MsoNormal"><a href="https://www.instagram.com/ssdp_synthesis/" target="_blank">https://www.instagram.com/ssdp_synthesis/</a><o:p></o:p></p>
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