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

Roman Sowa modular at go2.pl
Mon Mar 19 14:01:30 CET 2018


Oops, I was referring to my Soundcoud demo

Roman

W dniu 2018-03-19 o 13:51, paula at synth.net pisze:
> Umm, the three demo videos all have background click from fingers on 
> keys, plugging in cables, etc.
> 
> On 2018-03-19 12:09, Roman Sowa wrote:
>> That demo was line recorded.
>> Unless you mean my terrible lack of musical skills to play something
>> with it which might be called "music" by more than 2 people.
>>
>> IIRC it abuses serial port as PWM at not impressive frequncy, and
>> audio should be filtered down to some 3kHz or so. This example used
>> simple RC filter as suggested in the user manual.
>>
>> And about Jan Ostman being an enigma - I got the chip really quick and
>> with no problems, but OTOH I think it was the one and only thing in
>> his store back then.
>>
>> Roman
>>
>> W dniu 2018-03-19 o 12:53, paula at synth.net pisze:
>>> 5 voice paraphonic, not monophonic..
>>>
>>> it's just nuts, I'd love to hear some better quality demos (i.e. 
>>> non-mobile phone microphone)
>>>
>>> On 2018-03-19 11:30, Tom Wiltshire wrote:
>>>> That’s an interesting read.
>>>>
>>>> There’s several things that strike me straight away:
>>>>
>>>> 1) Naive oscillator waveforms with no band limiting
>>>> 2) Linear envelopes with 30ms steps, so no fine adjustment at the 
>>>> fast end
>>>> 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.
>>>>
>>>> Tom
>>>>
>>>> ==================
>>>>        Electric Druid
>>>> Synth & Stompbox DIY
>>>> ==================
>>>>
>>>>> 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
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