[sdiy] Cheapest good sounding digital reverb?

[ColinMuirDorward]

Oh, good idea.
I have a 4voice poly synth with individual outs and an x32, which gives me
four reverb slots. I could patch it up with four variations of the same
reverb. Unfortunately x32 has no automation on the FX or sends, even, so
couldn't really do any dynamic modulations.
This is all theory, though, since I'd have to finish what's on deck, first.

On Mon, Mar 22, 2021 at 12:54 PM Mike Bryant <mbryant at futurehorizons.com>
wrote:

> Agreed it's much more efficient.  But the Midas M32 for example does allow
> 8 different stereo reverbs to be applied to parts of the total mix.  But
> whether you can use this sort of power well is another thing.
>
>
> -----Original Message-----
> From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of
> Richie Burnett
> Sent: 22 March 2021 16:39
> Cc: *SYNTH DIY
> Subject: Re: [sdiy] Cheapest good sounding digital reverb?
>
> This is very true.  Most reverbs have just one (mono mix) or two (stereo)
> inputs to the reverb algorithm, whereas in practice every instrument is in
> a physically different place within a room.
>
> It's still easier (and much more computationally efficient) to feed
> multiple sources into one reverb algorithm in multiple different places
> than it is to implement a multitude of separate reverb algorithms in
> parallel though.
>
> But of course you can't gate the reverb from those multiple different
> sources independently.  Once the energy has been put into the tank it all
> gets mixed together.  The all-pass diffusers do a good job of shuffling it
> around on every pass round the loop!
>
>
> -Richie,
>
>
>
> -----Original Message-----
> From: Mike Bryant
> Sent: Monday, March 22, 2021 4:26 PM
> To: ColinMuirDorward ; Richie Burnett
> Cc: *SYNTH DIY
> Subject: RE: [sdiy] Cheapest good sounding digital reverb?
>
>
>
> 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.
>
> Also some of the best church organs were built placing different pipes in
> optimal locations to emphasise certain acoustic properties of the building.
>
>
>
>
>
> From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of
> ColinMuirDorward
> Sent: 22 March 2021 12:53
> To: Richie Burnett
> Cc: *SYNTH DIY
> Subject: Re: [sdiy] Cheapest good sounding digital reverb?
>
>
>
>
>
> Thinking more about this and wondering what would be the sonic difference
> between polyphonic reverb and "paraphonic" reverb.
>
>
>
> 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.
>
>
>
>
>
>
>
> 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.
>
>
>
>
>
>
>
> Colin
>
>
>
>
>
>
>
> On Mon, Mar 22, 2021 at 10:47 AM Richie Burnett via Synth-diy
> <synth-diy at synth-diy.org> wrote:
>
>
>
> A few general comments:
>
> 1. High quality reverb requires a decent chunk of MIPS and RAM.
> 2. Convincing small rooms with short reverb times are the hardest to do
> algorithmically.
> 3. Different reverb algorithms needed for different sources.  (More/less
> diffusion for percussive/pad sounds to trade off density & flutter against
> metallic ringing.)
> 4. 16-channels (or 64 !?) is a _LOT_ of data bandwidth.  Use DMA for the
> ADC/DAC/CODEC.
>
> You also need a decent size word-length for the storage and calculations.
> Early 16-bit reverbs were very noisy due to build up of quantisation noise
> within the algorithm due to feedback.  Use at least 20-bit storage or that
> funky floating-point RAM that Keith Barr used for the delay memory.  Or you
> might get away with noisy reverbs if you're gonna put a VCA (noise gate!)
> after it, but there will always be sounds like a deep mellow bass sound
> that
> will reveal "fizzy" quantisation noise because there's no HF content to
> mask
> it.
>
> -Richie,
>
>
> --
> This email has been checked for viruses by AVG.
> https://www.avg.com
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at synth-diy.org
> http://synth-diy.org/mailman/listinfo/synth-diy
> Selling or trading? Use marketplace at synth-diy.org
>
>
>
>
>
> --
>
>
>
> https://www.instagram.com/colinmuirdorward/
>
>
>
> -
>
>
>
>
> https://www.instagram.com/ssdp_synthesis/
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at synth-diy.org
> http://synth-diy.org/mailman/listinfo/synth-diy
> Selling or trading? Use marketplace at synth-diy.org
>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at synth-diy.org
> http://synth-diy.org/mailman/listinfo/synth-diy
> Selling or trading? Use marketplace at synth-diy.org
>


-- 
https://www.instagram.com/colinmuirdorward/
-
<https://www.instagram.com/colinmuirdorward/>
https://www.instagram.com/ssdp_synthesis/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20210322/69d08914/attachment.htm>