[sdiy] Prophet VS a phase accumulator design

[karl dalen]

> Scott Nordlund <gsn10 at hotmail.com>:
> Datum: söndag 6 februari 2011 00:31
> 
> > Speaking of reverbs, could be an interesting topic, i
> have an old ART verb
> 
> What model is it? The only one I've heard (Multiverb Alpha
> or something) sounded terrible.

Oh, i have forgotten,i have to go out to the gararage and dig it up,
literary speaking, haven't been turned on for past 12 years or so. :)
I remeber it was Ok on short times but platy on longer, delay, chorus
flanger where alright to, it was quite noisy on modulation algos.  

> > with two Z80 seemingly running in parallel, on takes
> top byte other low byte and a discreete logic wich these two
> runs into wheter the logic
> > does the actuall computation, i guess it do, some kind
> of spedy MAC
> > and Dram but unsure its a 16 bit stereo device,
> multiplexed PCM54.
> 
> Well the Wersi reverb does everything with the 6809. I
> haven't heard it so I don't know how much it actually
> resembles "reverb" (versus just delay). But it's mono with 4
> kHz bandwidth and 1kwords of RAM (so total delay time maybe

Keith Barr said once indirectly anything above 15Khz are
waste in reverberation.

> They're nothing amazing. You could pull up some random
> yamaha patent and find something more exciting.

I just did, and your right, quite weak patents as well. 
 
> > Looking forward to the write up i your going to
> publish it.
> 
> Yeah, I need to go back to working on it. I have all the
> info, it's just disorganized. It should attract a decent
> amount of attention.

I thought you just said you had no idea about the Fairlight. ;)
The DDS1 aren't completely solved yet, nor DPX either.

The are DPX intriguing.

KD