Some experimentation shows:
1) Normal outlets of HDSP must have some DC coupling because continuous
voltage drifts back to 0V over about a second or so.
2) Headphone outlet of HDSP must be truly DC coupled because I can send
continuous control voltage from there to analog synthesizer modules.
3) Range should be 2V peak to peak (I assume that means -2V to +2V,
giving 4 octave range).
Should be possible with other cards which have some properly DC coupled
outputs. I guess MOTU cards should work, as that's that the Volta app is
designed for.
Have fun,
D.
Derek Holzer wrote:
I got a bit interested by the (so far vapor-ware) MOTU Volta, and its
promise of synth CV control from a DC coupled soundcard. I've got a
Hammerfall DSP Multiface with DC-coupled inputs/oututs myself, and
figure it couldn't be too difficult to whip up a Pure Data patch to
interface with my Dopefer + homebrew modules. Is it done via PWM? Has
anyone successfully gotten this to work? What about recording CV?
best!
D.
--
::: derek holzer ::: http://blog.myspace.com/macumbista :::
http://www.vimeo.com/macumbista :::
---Oblique Strategy # 37:
"Convert a melodic element into a rhythmic element"
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