[sdiy] Psych Tone

[rsdio at audiobanshee.com]

Tempo seems to set the total envelope time, such that too much Attack and/or Decay leaves insufficient time for the envelope to finish, and then you hear clicking. This is on macOS in Safari. I find that reducing Tempo or reducing Attack or Decay will solve the clicking on output.

I assumed that this might have been a “feature” of the original Psych Tone.

Brian


On Jan 5, 2019, at 4:35 PM, John P Shea <info at extrinia.com> wrote:
> Nice work!
> 
> I found that (iOS/Chrome) introducing Decay caused clicking on the output, couldn’t relate this issue (feature?) to other parameters.
> 
> Just on iPhone speaker out btw.
> 
> Regards,
> JPS
> 
> On Sun, 6 Jan 2019 at 3:08 am, Donald Tillman <don at till.com> wrote:
>> Hiya,
>> 
>> I just whipped up a simulation of the Psych Tone in JavaScript.  Please enjoy:
>> 
>>    http://till.com/articles/psychtone/
>> 
>> (It's still a little rough.)
>> 
>> "WTF is a Psych Tone?"
>> 
>> The Psych Tone composes and plays musical sequences based on a Linear Feedback Shift Register.  Don Lancaster invented and published (and named) it in the February 1971 issue of Popular Electronics magazine.  
>> 
>> The original article is here:
>> 
>>    https://www.tinaja.com/glib/psyctone.pdf
>> 
>> As hobbyist electronic music projects go, it's pretty impressive.  A 6-bit LFSR with variations, VCO, envelope generator, voltage controlled attenuator, and some logic to introduce rests, all in one package.