I'm newbie. Experts help needed.

[AdLibitouch.com]

Hi people,

at first, excuse me for my poor English. I hope you can understand me.

I'm using my own application (www.adlibitouch.com) for audio control on
stage during live music shows. 'Server' app is writed using PureData and
'client' app is writed using Flash. I have 'touch' and wireless audio
control. It's nice for my needs.

But, at this moment, I'm trying to add audio transport from server to
clients. Obviously, I need near-zero latency, because audio received on
clients (PDA, PPC, laptop, etc.) can be used as audio monitoring system
for singers or musicians.

My questions to Jack experts is:

1) Do you think Jack is the better solution to do it?

2) Can I run Jack client on Windows Mobile devices? Alternatives?

3) Do you think is possible to do it over wifi with a decent audio quality?

4) Exists some free library or piece of code for adding to
ActionScript-Flash in order to listen Jack Server streaming?

Any help, examples, ideas or suggestions will be very appreciated and
welcomed.

Thank you very much in advance.
Best wishes from Spain.

--
www.AdLibitouch.com
P.O. Box 432
17230 - Palamós - Girona
info@...

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[Jörn Nettingsmeier-5]

i'm not an expert on the issues you asked about, but here's what little
i know:

AdLibitouch.com wrote:

> Hi people,
>
> at first, excuse me for my poor English. I hope you can understand me.
>
> I'm using my own application (www.adlibitouch.com) for audio control on
> stage during live music shows. 'Server' app is writed using PureData and
> 'client' app is writed using Flash. I have 'touch' and wireless audio
> control. It's nice for my needs.
>
> But, at this moment, I'm trying to add audio transport from server to
> clients. Obviously, I need near-zero latency, because audio received on
> clients (PDA, PPC, laptop, etc.) can be used as audio monitoring system
> for singers or musicians.
>
> My questions to Jack experts is:
>
> 1) Do you think Jack is the better solution to do it?

don't know if it's "better". but it enables you to integrate a large
number of potentially useful applications into your setup without any
glue or hackery.

> 2) Can I run Jack client on Windows Mobile devices? Alternatives?

don't know.

> 3) Do you think is possible to do it over wifi with a decent audio quality?

i know it is possible - torben hohn (author of netjack) uses it
routinely over his home wifi. *BUT*: whether you want to do that live in
unknown locations (unknown in terms of radio interference) and still be
able to sleep at night is your decision. i would pee my pants.
one stream on an otherwise idle WIFI is probably easy. but i don't want
to imagine the collisions you'll get when 3-4 endpoints are streaming
simultaneously... maybe a separate AP (on separate WIFI channels) for
each client might help.
anyways, it would be very wise indeed to have a wire-based fallback option.

> 4) Exists some free library or piece of code for adding to
> ActionScript-Flash in order to listen Jack Server streaming?

don't know either.


best,

jörn


--
Jörn Nettingsmeier

Verantwortlicher für Veranstaltungstechnik

Audio and event engineer
Ambisonic surround recordings

http://stackingdwarves.net
[phone]

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[Oliver Oli-3]

On Mon, Jun 22, 2009 at 6:19 PM, AdLibitouch.com<info@...> wrote:

> Hi people,
>
> at first, excuse me for my poor English. I hope you can understand me.
>
> I'm using my own application (www.adlibitouch.com) for audio control on
> stage during live music shows. 'Server' app is writed using PureData and
> 'client' app is writed using Flash. I have 'touch' and wireless audio
> control. It's nice for my needs.
>
> But, at this moment, I'm trying to add audio transport from server to
> clients. Obviously, I need near-zero latency, because audio received on
> clients (PDA, PPC, laptop, etc.) can be used as audio monitoring system
> for singers or musicians.

Isn't there is less experimental way to transmit audio? FM radio?
Renting wireless in-ear monitoring systems?

In theory jackd + netjack could run on some mobile device with Linux,
but there are so many things that can go wrong, I would not rely on
it.
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[Oliver Oli-3]

On Thu, Jun 25, 2009 at 5:52 PM, Bob McGwier<rwmcgwier@...> wrote:
> ANY network carrying PDA, etc. is not now nor will be near zero latency.
> Secondly, the audio is going to go through compression with ugly phase
> distortions due to the lossy compression, etc. and the source of major
> complaints from singers and musicians.

I think is quite possible to playback audio with less then 10ms
latency over a wireless net on a mobile device, but it's not trivial
and I don't know any out of the box solution. You could write an
iPhone application that speaks the Netjack2 protocol or try to find a
linux based mobile device with a low latency audio device and run
jack2 with the net backend.

An example for a low latency audio application on the iPhone:
http://www.patokeefe.com/archives/230

Still, I would look for less experimental solutions first.
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[Ralf Mardorf]

Oliver Oli wrote:
> [snip]
> Still, I would look for less experimental solutions first.
>  
Before Oliver Oli wrote:
> Isn't there is less experimental way to transmit audio? FM radio?
> Renting wireless in-ear monitoring systems?
> [snip]

I searched by Google for circuit diagrams. I didn't find any usable and
even if there will be some good circuit diagrams for wireless
monitoring, in Germany there still is the problem with the law and I
guess it's not different in other countries. To rent (or buy) stuff
seems to be the only solution, but not everybody can pay for this. I'm
not fine with the possibilities of JACK, but if there is an experimental
way to use it for the needed task, he might should try this. I didn't
think of such possibilities by using Linux, but if there are still first
beginnings for such usage ... wow ... I'm deeply impressed, even if it's
experimental.


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