[PD] converting incoming audio/voltages into CV for Eurorack modules

Sun Jan 24 16:47:37 CET 2016

The TLC5940 or TLC5941 PWM ICs have 16 channels of 12-bit resolution, and
can be daisychained for more channels. They are supported by a library for
Arduino. Although they are usually used for LEDs they also work for servos
or general PWM.

Martin

On Sun, Jan 24, 2016 at 5:09 AM, Simon Iten <itensimon at gmail.com> wrote:

> yeah it is. but be aware (once more) that one very high pwm frequencies
> you will loose some resolution.
> > On 24 Jan 2016, at 01:11, Christof Ressi <christof.ressi at gmx.at> wrote:
> >
> > Thanks for pointing me to that! Turns out to be really easy:
> http://playground.arduino.cc/Code/PwmFrequency
> >
> >
> >
> >
> >> Gesendet: Samstag, 23. Januar 2016 um 12:34 Uhr
> >> Von: "Simon Iten" <itensimon at gmail.com>
> >> An: "Christof Ressi" <christof.ressi at gmx.at>
> >> Cc: Alex <x37v.alex at gmail.com>, "Ricky Graham" <
> rickygrahammusic at gmail.com>, "pd-list at lists.iem.at" <pd-list at lists.iem.at>
> >> Betreff: Re: [PD] converting incoming audio/voltages into CV for
> Eurorack modules
> >>
> >> are you aware that you can increase the pwm frequency considerably?
> still less for 9 10 11 but far higher then by default for all pwm pins.
> >>
> >>
> >>> On 23 Jan 2016, at 12:09, Christof Ressi <christof.ressi at gmx.at>
> wrote:
> >>>
> >>> I'm right now controlling an analog synth via Pd :-). I'm just using
> an arduino - works well. It depends how many CV sources you wanna have,
> though. Generating trigger signals (e.g. for envelope generators) is really
> easy because you can directly use the digital outs. CV for modulation is a
> bit more tricky because you have to smooth the PWM outputs of the arduino
> with low pass filters. I found that using two RC circuits in series (with C
> = 1 microFarad and R = 3,3 kOhm) works decently for pins 5 and 6 on the
> Arduino Uno (pins 9, 10, 11 have a lower PWM frequency and therefore might
> need a lower cutoff frequency). I'm thinking about trying out some
> multichannel DACs with 10 or 12 bit because PWM on the arduino is only 8
> bit. DACs also operate at a much higher frequency so smoothing would be
> much easier.
> >>>
> >>>
> >>>
> >>> Gesendet: Freitag, 22. Januar 2016 um 22:24 Uhr
> >>> Von: Alex <x37v.alex at gmail.com>
> >>> An: "Joe White" <white.joe4 at gmail.com>
> >>> Cc: "pd-list at lists.iem.at" <pd-list at lists.iem.at>, "Ricky Graham" <
> rickygrahammusic at gmail.com>
> >>> Betreff: Re: [PD] converting incoming audio/voltages into CV for
> Eurorack modules
> >>>
> >>> Ahh cool, yeah, I saw that page but only quickly scanned and found no
> info where to get the hardware, the place it links to has this at the top
> of the page:
> >>>
> >>> "Update 25 November 2014: software link below; stay tuned for hardware
> info"
> >>> ha..
> >>> I just emailed Andrew directly.
> >>> Thanks!
> >>>
> >>> On Fri, Jan 22, 2016 at 12:32 PM, Joe White <white.joe4 at gmail.com>
> wrote:
> >>> Hey Alex,
> >>>
> >>>
> https://code.soundsoftware.ac.uk/projects/beaglert[https://code.soundsoftware.ac.uk/projects/beaglert]
> >>>
> >>> I think they're working out a kickstarter campaign to be released soon!
> >>>
> >>> Cheers,
> >>> Joe
> >>>
> >>>
> >>> On 22 January 2016 at 18:07, Alex <x37v.alex at gmail.com[
> x37v.alex at gmail.com]> wrote:
> >>>
> >>> Hey Ricky,
> >>> I've done some major google searches and have yet to find where one
> can get this Audio cape [bela?]. Can you point me to it?
> >>> Thanks,Alex
> >>>
> >>>
> >>> On Fri, Jan 22, 2016 at 8:58 AM, Ricky Graham <
> rickygrahammusic at gmail.com[rickygrahammusic at gmail.com]> wrote:I’m using
> the Beagle Bone Black with Andrew McPherson’s Audio Cape + Martin Roth’s
> “Heavy” (enzienaudio).
> >>>
> >>> Works great.
> >>>
> >>>> Message: 1
> >>>> Date: Fri, 22 Jan 2016 15:29:38 +0000
> >>>> From: "Pagano, Patrick" <pat at digitalworlds.ufl.edu[
> pat at digitalworlds.ufl.edu]>
> >>>> To: "pd-list at lists.iem.at[pd-list at lists.iem.at]" <pd-list at mail.iem.at
> [pd-list at mail.iem.at]>
> >>>> Subject: [PD] converting incoming audio/voltages into CV for Eurorack
> >>>>       modules
> >>>> Message-ID: <1453476580193.32310 at digitalworlds.ufl.edu[
> 1453476580193.32310 at digitalworlds.ufl.edu]>
> >>>> Content-Type: text/plain; charset="iso-8859-1"
> >>>>
> >>>> I would like to hear how people may be converting incoming audio into
> Control Voltage for eurorack use.
> >>>>
> >>>> This year i indulged in building a eurorack synthesizer and i would
> like to start using some interesting libraries i have found in pure data to
> control my synthesizer but i want to do it elegantly.
> >>>>
> >>>>
> >>>> For example: I am trying to make a Fractal CV generator with pure
> data. I am using Ben Bogarts "Chaos" libraries and i am hoping for some
> ideas on how to convert the streams of data into usable CV outside the box,
> >>>>
> >>>>
> >>>>
> >>>>
> >>>> Patrick Pagano B.S, M.F.A
> >>>> Audio and Projection Design Faculty
> >>>> Digital Worlds Institute
> >>>> University of Florida, USA
> >>>> (352)294-2020
> >>>
> >>>
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> >>
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