[sdiy] DSP MIDI Synth (was Re: 566 Functional Replacement)

[Michael Zacherl]

> On 19 Mar 2018, at 12:30, Tom Wiltshire <tom at electricdruid.net> wrote:
> 
> That’s an interesting read.

I’m sure you saw the credit section?

> 2) Linear envelopes with 30ms steps, so no fine adjustment at the fast end

Yes … yuk!
I remember fine-tuning an envelope’s attack when I wrote an instrument in SuperCollider.
I ended up manually entering the first five or six values for its time because no function for the non-linear curve would allow sensible settings for these first values of the 7-bit MIDI-range a had to deal with. And since the audio material was based on sine-waves that was even more crucial for the sound of the fastest attacks. 

> 3) Very basic filter code
> 
> I still think getting a entire DSP mono synth into an 8-pin DIP is quite impressive, especially in C, but a 32-bit ARM chip can produce better sound than this is going to.

it’s the “last mile” or a bit like the Pareto principle: the last 20%, which make a product great, cost you 80% of the total effort. This one looks and sounds a bit like this.

>> On 19 Mar 2018, at 10:16, Vladimir Pantelic <vladoman at gmail.com> wrote:
>> 
>> On 18.03.2018 19:31, Roman wrote:
>>> And it sounds like crap and makes unpredictible things.
>> 
>> that's perfect for a Eurorack module then! ;)
>> 
>> btw, source code is here for the curiously inclined:
>> 
>> https://www.hackster.io/janost/the-dsp-gplug-midi-synth-80b2aa