[sdiy] wireless patching

[Quincas Moreira]

Wow Martin, that's  amazing! I'll look into the OSM for sure :)

Roman, PWM over radio sound like just the madness I was imagining!

Thanks guys :)

On Thu, May 25, 2017 at 9:04 AM, Martin Klang <mars at pingdynasty.com> wrote:

> We use the Particle Photon wifi module in our Open Sound Module [1]
> which is a bi-directional OSC to CV/Gate interface for Eurorack.
>
>
> When we launched the OSM the Photon firmware libraries didn't support
> the modes of communication (stand-alone AP, node-to-node) that we needed
> so a lot of work had to be done to modify it.
>
>
> OSM implements OSC over UDP, and HTTP,  but we've also beta support for
> RTP-Midi (works well, has built in latency compensation) and web
> sockets. Typical latency is less than 15ms round trip (module to module).
>
> In real use the latency is not noticeable and using OSC floats there's
> no stepping.
>
>
> Martin
>
>
> [1] http://www.rebeltech.org/products/open-sound-module/
>
>
> On 25/05/17 14:40, Tom Wiltshire wrote:
> > …and the great thing is, if you send 528 14-bit controls over MIDI, you
> won't even have to worry about Bluetooth not being realtime, because it'll
> take so long it'd be faster to write the data on a snail's shell and send
> it across the room!
> >
> > I'm sure there's a way to do this, but I doubt the common wireless
> things are the way to go. They mostly seem to be aimed at communicating
> small amounts of data in short packets. I'd be looking for something more
> like wireless streaming of multitrack audio.
> >
> > Tom
> >
> > On 25 May 2017, at 06:52, rsdio at audiobanshee.com wrote:
> >
> >> Hey Quincas,
> >>
> >> MIDI is not limited to 128 steps!
> >>
> >> Pitch Bend always has 16384 steps, and there are 32 Continuous
> Controllers with both MSB and LSB for 16384 steps. Mod Wheel is one of
> those 32 CC numbers. Across all 16 channels, that makes a total of 528
> controls on a single MIDI cable that each have 16384 steps. This is all
> standard MIDI 1.0 specification.
> >>
> >> I'm not familiar with MIDI over Bluetooth with regard to latency or any
> limitations in resolution that might be specific to Bluetooth, but I don't
> see how MIDI resolution could be any different over Bluetooth than any
> other medium.
> >>
> >> Brian Willoughby
> >> Sound Consulting
> >>
> >>
> >> On May 24, 2017, at 9:14 PM, Quincas Moreira <quincas at gmail.com> wrote:
> >>> Thanks Justin. I'd like to build something from the ground up, with
> hopefully way better resolution than 128 steps, but thanks for joining in
> on the brainstorming :)
> >>>
> >>> On Wed, May 24, 2017 at 11:11 PM, Justin Herrmann <
> ebn303afxcut at email.com> wrote:
> >>>> Hey Quincas,
> >>>>
> >>>> Roland's A-01 sound module can receive MIDI over Bluetooth LE. I'm
> not sure what the data rate is. You could turn CVs into pitch bend or mod
> wheel MIDI messages maybe.
> >>>>
> >>>> Just spitballing.
> >>>>
> >>>> Justin
> >>>> On 05/24/2017, 6:42 PM John Speth <john.speth at andrews-cooper.com>
> wrote:
> >>>>> I’d pick Bluetooth SPP because that’s what I know and it’s really
> cheap now.  I recently used the inexpensive Wifi based Particle module.
> It’s really idiot proof.  I’m not sure if you can transmit module to module
> with Particle.
> >>>>>
> >>>>>
> >>>>> No matter what you pick, latency will be a nuisance.  I hope your
> application can tolerate it because digital wireless is neither temporally
> fast nor accurate.  It’s a good case for choosing custom analog wireless
> but I don’t know what is available in that area.
> >>>>>
> >>>>>
> >>>>> JJS
> >>>>>
> >>>>>
> >>>>> From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf
> Of Quincas Moreira
> >>>>> Sent: Wednesday, May 24, 2017 4:14 PM
> >>>>> To: synth-diy mailing list <synth-diy at synth-diy.org>
> >>>>> Subject: [sdiy] wireless patching
> >>>>>
> >>>>> Hey friends!
> >>>>>
> >>>>> If you were to design a fast and precise wireless transmission and
> reception system for eurorack, how would you doi it? Synth 1 > ADC > uP >
> Bluetooth > uP > DAC > synth 2 ?  Or is there a simple analog way to do it
> with RF?
> >>>>>
> >>>>> I mainly want to send control signals, but as we know, those can be
> up in the audio frequencies or higher!
> >>>>>
> >>>>> The idea is to have like, 4 systems set up on 4 corners of a room
> and inter-patch them without stretching long cables all over the place. I
> think 8 sends and 8 receives on each remote patch box would suffice, and
> some system to match sends to receives.
> >>>>>
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-- 
Quincas Moreira
Test Pilot at VBrazil Modular
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