[sdiy] Ray tracing hardware for audio simulation

[Mike Bryant]

Dig deeper.  Audinate are the gold standard in transport, and all the mixing systems based upon their IP depend on them to be as fast as possible.  They have published numerous papers on this.

And it's not the reverb signal that needs to be fast - it's the direct part of signal. 


Latency is when the whole signal is delayed equally.  The delay in analogue systems varies with frequency, but if not filtered is usually very low.


-----Original Message-----
From: mskala at northcoastsynthesis.com [mailto:mskala at northcoastsynthesis.com] 
Sent: 01 August 2022 15:12
To: Mike Bryant
Cc: synth-diy at synth-diy.org
Subject: RE: [sdiy] Ray tracing hardware for audio simulation

On Mon, 1 Aug 2022, Mike Bryant wrote:

> https://www.audinate.com/learning/faqs/how-much-latency-is-acceptable-
> in-a-live-sound-situation

This Web page simply *asserts*, without evidence, that low latency is desirable in the context of transport, not processing - and it's from a company in the business of selling such transport systems.  An equally strong argument can be made for oxygen-free copper.

That's not to say high-speed transport connections are worthless, but it's a stretch from a company proudly claiming that their digital network can compete with a simple analogue wire because it's almost as fast, to the idea that a reverb unit needs to also be almost as fast as a wire.

> Trust me 1mS in a DSP processor is horrendous and asking for problems.  Except for a few special cases, all my digital products keep processing delay under 10 samples (100uS), leaving just the ADC and DACs as main cause of delay.
> Sometimes analogue (i.e. no latency) has a lot going for it !

Analogue is not without latency; nothing that processes frequencies over time can be.

--
Matthew Skala
North Coast Synthesis Ltd.