[Fpga-synth] Linear / Expo Release for ADSR Working

[Theo Verelst]

On Mon, 2009-04-06 at 16:51 -0700, Scott Gravenhorst wrote:
> Have a listen:
> 
> http://home1.gte.net/res0658s/gatemanpoly_bell_lin_expo.wav
> 
> This is a sample of two strikes of a bell sound, the first uses linear release, the second uses
> exponential release.  There is a marked difference, especially near the end of the fade out.
> 
> For those interested...

Hi Scott,

I am going to make the gateman into a software simulation, in C, but
maybe you have that already ? 

I would seem fun to me to take the FPGA design and simulate the exact
datapath in software (probably as a realtime Jack/alsa midi program),
which would also be very good for assessing accuracy and even sampling
issues and of course to try out stuff more easily like different ADSRs.
It is possible I also turn my DSP synthesizers datapath into a Linux
program, I know that one at least sounds good (too, there are many
softsynths) and it's source is alread in C, except the Signal Processing
interrupt loop loop and IO are different.

The blocks could be connectable over my Bwise (http://wiki.tcl.tk/Bwise)
but I didn't make such type of app with it yet (I have in the past
though).

Kind regards

   Theo Verelst
   http://www.theover.org/wiki/index.php/FpgaSynth

P.S. In case your open source license or your own mind have problems
with this let me know.