[LAU] Theramin oscillator for LADSPA?

[Lorenzo Sutton]

On 06/10/2013 22:29, Ken Restivo wrote:
> On Sun, Oct 06, 2013 at 10:55:15AM +0000, Fons Adriaensen wrote:
>> On Sun, Oct 06, 2013 at 01:59:15AM -0700, Ken Restivo wrote:
>>
>>> http://www.horst-theremin.com/images/_mid%20600%20Hz.jpg
>>
>> You don't need to reproduce the waveform, but the spectrum,
>> which is roughly:
>>
>>   Freq     Amp
>> ---------------
>>    1      1.000
>>    2      0.191
>>    3      0.065
>>    4      0.041
>>    5      0.019
>>    6      0.012
>
> Cool, thanks.
>
> How would one do that with LADSPA plugins? 6 sine wave oscillators into a mixer, one for each harmonic?

You might look into using Pure Data: you can both have:
- (virtually) any number of oscillators with the advantage that each 
partial's strength (and frequency) can be independently and dynamically 
modified
- the [tabosc4~] object which is a wavetable oscillator. The [sinesum( 
message sent to a table (a.k.a. array) with partial strengths will do 
the sum for additive synthesis. In this case of course it woun't be 
possible to dynamically change the partials' strength (although I think 
people have used tricks to switch between different tables seamlessly).

Not to mention the many built-in features to connect to the external 
world for control such as MIDI, OSC, TCP/IP, arduino, to mention a few..

Hope this helps.
Lorenzo