RE: [sdiy] Request ideas for a digital-analog synth

[rdrake]

there is a forum on electro-music.com dedicated to microcontrollers & emusic:

http://electro-music.com/forum/index.php?f=158

bbob

>----- ------- Original Message ------- -----
>From: mrluzeiro at ua.pt
>To: synth-diy at dropmix.xs4all.nl
>Sent: Thu, 07 Feb 2008 00:07:38
>
>Hallo there! First post here!
>
>I've starting reading about DIY synths and I'm plan
>play 
>with my own. I've found nice pages around web, i'm
>studing 
>the schematics and so on.
>I've some ideias of what I want and I'd like know
>if you 
>would like share and give me any sugestions for
>this:
>
>Firstly, I'm not play doing a real analog synth,
>but some 
>hybrid digital/analog control.
>
>I'm planning use a microcontroler to control and
>play with 
>analog part.
>With PIC I can get: 10 MIPS, PWM (8..10bits), ADC
>>50ksps 
>10bits, comparators, IO ports, and so on.
>
>I dont like much the idea of using a DAC because I
>dont 
>have so uch CPU power to play with and to all in
>the CPU, 
>but I can use some kind of "resistor DAC" to
>control some 
>levels, maybe pwm to control some LFO voltages, etc
>
>What's your opinion about "resistor DACs"?
>
>I would like my circuit will not be too much
>complex, 
>because I plan then add paralell voices,
>replicating the 
>circuit, but I dont want it so simple because I
>would like 
>play with lot of parameters and haver rich sounds
>
>I'm not interested also in audophile quality
>assegurance, 
>firstly I want just some nice noise :)
>
>The main goal using a microcontroler is to let the
>micro 
>produce some kind of sound, or play wish diferent 
>waveforms, maybe selecting them or guide them
>(waveguide?) 
>and minimise the use of external components. In the
>
>schematics I'me learning in web, they are more
>focus for 
>>all real< analog synths:
>
>What do you sugest I learning and looking for? What
>ideas 
>do you think I can explore using the microcontroler
>and 
>analog?
>
>I've found about 1 ou 2 projects using
>microcontrolers, 
>but they seam too simple to mee, just "tri,saw,sqr"
>
>waves->Filter->envelop
>
>Idea: If I use two separate "8bit or more resistor
>DAC" 
>(resistor so we can haver different level because
>resistor 
>tolerance) to play "two voices" an then put it to 
>filter,efx,etc... will output listened sound less
>"8bit" 
>?!
>
>
>Thanks in advance for sugestions!!
>Mario "KammutierSpule" Luzeiro
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