[sdiy] MIDI guitar

Veronica Merryfield veronica.merryfield at shaw.ca
Fri Jul 10 23:01:35 CEST 2009


There are a number of techniques to the pitch detection that work very  
well for a guitar that aren't too complicated. A patent search will  
throw up most of them. The code involved is not that complex either  
but if you have never coded, that may be an issue.

If the MIDI part of the spec were dropped, Roland's early GR series  
used waveshaping for the oscillators and envelope followers to drive  
the filters or trigger AR envelopes. This could form the basis to a  
more complete synthesis system if required.



On 10-Jul-09, at 11:03 AM, Antti Huovilainen wrote:

> On Fri, 10 Jul 2009, Jerry Gray-Eskue wrote:
>
>> There are commercial devices to do this on the market already, so  
>> it is
>> possible with current tech.
>>
>> There is no reason you cannot DIY, it will take considerable effort.
>
> Apart from most (everyone?) here lacking the needed state of the art  
> research info. It's very much a non-trivial problem if/when you want  
> fast tracking. With analog synths it's slightly less of a problem as  
> you can finetune the pitch later to be more accurate.
>
> Antti the killjoy
>
> "No boom today. Boom tomorrow. There's always a boom tomorrow"
>  -- Lt. Cmdr. Ivanova
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