[sdiy] ADSR Plus - 8 parameters?

ChristianH chris at chrismusic.de
Thu Feb 3 10:45:04 CET 2011


On Thu, 03 Feb 2011 18:43:17 +1030 Matthew Smith <matt at smiffytech.com> wrote:

> I've figured out my digital ADSR generator - microcontroller feeds DAC, 
> is controlled by an 8-input SPI ADC connected to a set of 8 pots. (This 
> section nicked from my notes on how I might build a replacement for a 
> Roland PG-800.)
> 
> 7 pots accounted for:
> 
> * Attack time
> * Attack shape (straight line, curving inwards)
> * Decay time
> * Decay shape (as above)
> * Sustain level
> * Release time
> * Release shape (ditto)
> 
> As I have an extra channel going spare, is there another useful 
> parameter I could put in there, bearing in mind that I'm not going to be 
> doing aftertouch?

What about "Hold Time" (delay after attack until decay starts)?

Chris



> Reason for external ADC: I've read in a few places that internal ADCs 
> can be a bit, er, rough.
> 
> Cheers
> 
> M
> 
> -- 
> Matthew Smith
> Smiffytech - Technology Consulting & Web Application Development
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