Re: [RDD] OT XLR Pi Hat

[Marc Steele]

Hello,

To answer your questions:


>- Balanced Audio via..?
>
>
I'd generally push for XLR in most cases if there's space. Otherwise I'd
look for D-type (assuming it's for external use) or screw terminals
(internal use).


>
>- Access to GPIO Pins?
>
>
Any GPIO pins they could offer out would be useful.


>
>- Access to USB?
>
>
Hmm... I'm not so sure about this one.


>
>- Access to Network?
>
>
Again, I'm a little lost as to a use for it on an audio interface. Other
than specifically driving Ravenna/Livewire from hardware.


>
>- Anything else they haven't thought of?
>
>
Probably but I can't think of anything right now.


>
>
> And now the awkward question, what price range would you be prepared to
> pay for something like this?
>

Now there's a question. It's specialist but being teamed up with a low cost
bit of kit. For reference, the Wolfson board for the Pi goes for up to £30.
I'd therefore expect the cost to be a bit north of that.

Regards,

Marc.
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Re: [RDD] OT XLR Pi Hat

[Wayne Merricks]

Hi,

Yes XLRs fit fine on 1U but not with the Pi Underneath it.  You 
basically have this set up (ripped from IQ Audio's email):


1U ~ 40mm
5mm spacer under pi
2mm pi pcb
12mm spacer (to clear pi components)
2mm DAC Hat

Leaves: 19mm to fit XLR connectors.


Wayne Merricks
The Voice Asia

On 17/09/15 16:52, David Klann wrote:

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256

I'm making a 1U device (not for Rivendell) that includes 4 XLR
connectors on a modified back panel. They fit just fine!

Parts from parts-express.com:

Item Number 092-0156, Amphenol AC3FDZB XLR "D" Flange Panel Mount
Connector Female
Item Number 092-0158, Amphenol AC3MMDZB XLR "D" Flange Panel Mount
Connector Male

The 1U case is from Athena Power, model RM-1U100DR22

Hope this helps!

   ~David Klann


On 09/17/2015 09:53 AM, Wayne Merricks wrote:

Hi,

Just to be clear, I'm nothing to do with IQ Audio, I just asked them

if they did any XLR boards a few months back.  They emailed back the
same day saying interesting idea and they'll look into it.  Now they're
asking more questions and are planning a prototype for the next month or
so which from my point of view is a pretty decent response to a pretty
stupid question.

The full size XLRs are a bit iffy if you want to fit in a 1U case,

they seem like a genuine bunch of people so didn't want to be the only
one to blame for saying "XLR's wouldn't fit can I just have headers".

Wayne Merricks
The Voice Asia

On 17/09/15 15:45, Cowboy wrote:

On 09/17/2015 10:23 AM, Wayne Merricks wrote:

The questions they've asked me is what would you want from such an

addon:

   * Balanced Audio via..?
   o XLR (may not fit into a 1U height restriction)
   o Mini XLR
   o 3.5mm stereo/balanced Jacks
   o Header pins

  As standard as possible.
  That means full size XLR, header pins, RJ-45

  Since the professional world seems to be moving to RJ-45 with the
  Radio Systems wiring standard, I'd lean heavily in that direction.


   * Access to GPIO Pins?

  Absolutely !


   * Access to USB?

  eh.


   * Access to Network?

  Yes.


   * Anything else they haven't thought of?

  Probably.:-)


And now the awkward question, what price range would you be prepared

to pay for something like this?

  At least a buck-two-ninety-eight.  ;-)




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Re: [RDD] OT XLR Pi Hat

[Cowboy]

On 09/17/2015 10:53 AM, Wayne Merricks wrote:


 Now they're asking more questions and are planning a prototype for the next 
month
or so which from my point of view is a pretty decent response to a pretty 
stupid question.


 Not a stupid question, and more than a decent response, considering the 
responses
 I've gotten over the years from various sources about various things.


they seem like a genuine bunch of people so didn't want to be the only one to 
blame for
saying "XLR's wouldn't fit can I just have headers".


 I would suggest RJ-45 standard, with an optional ( extra cost ) break-out box
 for most anything anyone might want, which would be the full size XLR's, or
 screw terminals, or.

--
Cowboy

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Re: [RDD] OT XLR Pi Hat

[Frederick Gleason]

On Sep 17, 2015, at 10:23 52, Wayne Merricks  
wrote:

> The questions they've asked me is what would you want from such an addon:
>   • Balanced Audio via..?
>   • XLR (may not fit into a 1U height restriction)
>   • Mini XLR
>   • 3.5mm stereo/balanced Jacks
>   • Header pins

StudioHub!  See:

http://www.studiohub.com/PDF/PinoutGuidewithAdapters.pdf

This is what pretty much the entire broadcast equipment industry is moving to.


>   • Access to GPIO Pins?

Euroblock connectors.  Those pins will also need to be electrically isolated 
—e.g. onto-isolators on the inputs and OCs/reed relays on the outputs.  The 
GPIO pins on a PI will tolerate 3.3vdc tops; you’ll blow up the device if you 
expose it to more.  Broadcast plants typically use a lot more (5 or even 12 or 
24 vdc is not uncommon).


>   • Access to USB?
>   • Access to Network?

Both are absolutely necessary.


>   • Anything else they haven't thought of?

PoE option (would power the PI as well).


> And now the awkward question, what price range would you be prepared to pay 
> for something like this?

A lot would depend on the mechanical details.  Would this include some sort of 
case, a naked PC board, something else?

Cheers!


|--|
| Frederick F. Gleason, Jr. |  Chief Developer |
|   |  Paravel Systems |
|--|
|  A room without books is like a body without a soul. |
| -- Cicero|
|--|


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Re: [RDD] OT XLR Pi Hat

[Frederick Gleason]

On Sep 17, 2015, at 11:52 29, Cowboy  wrote:

> I would suggest RJ-45 standard, with an optional ( extra cost ) break-out box
> for most anything anyone might want, which would be the full size XLR's, or
> screw terminals, or.

Of which RadioSystems already makes a full line:

http://www.studiohub.com/adapterdonglessplitterscouplers.php

Cheers!


|--|
| Frederick F. Gleason, Jr. |  Chief Developer |
|   |  Paravel Systems |
|--|
|  A room without books is like a body without a soul. |
| -- Cicero|
|--|

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Re: [RDD] OT XLR Pi Hat

[Christian Pointner]

Hi

Am 17.09.2015 um 16:23 schrieb Wayne Merricks:
> I've been contacted by the IQAudio Pi HAT guys (iqaudio.co.uk).  They're
> looking into the potential of having a balanced XLR output board for the
> Pi.  I know what we would use it for (1U rack mount receiver, Internal
> monitoring/network speakers, potentially some sort of IP Phone
> interface, maybe even a one output Rivendell box with GPIO support).
> 
Sounds great!

> The questions they've asked me is what would you want from such an addon:
> 
>   * Balanced Audio via..?
>   o XLR (may not fit into a 1U height restriction)
>   o Mini XLR

I would prefer XLR or RJ45 for the Audio - definitely not Mini XLR

>   o 3.5mm stereo/balanced Jacks

If it hase RCA plugs i would prefer 6.3mm jacks as most other devices
and patchpanels have these as well.

>   o Header pins

would be ok if they also produce/sell  small breakout boards with XLR

>   * Access to GPIO Pins?

definitely

>   * Access to USB?

not sure about that. For most purposes i wouldn't use it because the USB
Port instability of the Raspi is legendary...

>   * Access to Network?

sure

>   * Anything else they haven't thought of?
> 
balanced inputs!  not sure if this works with the Raspberry but there
should be an I2S interface on the board somewhere...

It would also be ok to have seperate input and output boards because
most of the time i would need only one but not both on the same raspi.

> And now the awkward question, what price range would you be prepared to
> pay for something like this?
> 
something between 80 and 100 Euros would be ok for me/us.

regards
 christian
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Re: [RDD] OT XLR Pi Hat

[Wayne Merricks]

Hi,

Just to be clear, I'm nothing to do with IQ Audio, I just asked them if 
they did any XLR boards a few months back.  They emailed back the same 
day saying interesting idea and they'll look into it.  Now they're 
asking more questions and are planning a prototype for the next month or 
so which from my point of view is a pretty decent response to a pretty 
stupid question.


The full size XLRs are a bit iffy if you want to fit in a 1U case, they 
seem like a genuine bunch of people so didn't want to be the only one to 
blame for saying "XLR's wouldn't fit can I just have headers".


Wayne Merricks
The Voice Asia

On 17/09/15 15:45, Cowboy wrote:

On 09/17/2015 10:23 AM, Wayne Merricks wrote:
The questions they've asked me is what would you want from such an 
addon:


  * Balanced Audio via..?
  o XLR (may not fit into a 1U height restriction)
  o Mini XLR
  o 3.5mm stereo/balanced Jacks
  o Header pins


 As standard as possible.
 That means full size XLR, header pins, RJ-45

 Since the professional world seems to be moving to RJ-45 with the
 Radio Systems wiring standard, I'd lean heavily in that direction.


  * Access to GPIO Pins?


 Absolutely !


  * Access to USB?


 eh.


  * Access to Network?


 Yes.


  * Anything else they haven't thought of?


 Probably.:-)

And now the awkward question, what price range would you be prepared 
to pay for something like this?


 At least a buck-two-ninety-eight.  ;-)



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Re: [RDD] OT XLR Pi Hat

[Cowboy]

On 09/17/2015 10:23 AM, Wayne Merricks wrote:

The questions they've asked me is what would you want from such an addon:

  * Balanced Audio via..?
  o XLR (may not fit into a 1U height restriction)
  o Mini XLR
  o 3.5mm stereo/balanced Jacks
  o Header pins


 As standard as possible.
 That means full size XLR, header pins, RJ-45

 Since the professional world seems to be moving to RJ-45 with the
 Radio Systems wiring standard, I'd lean heavily in that direction.


  * Access to GPIO Pins?


 Absolutely !


  * Access to USB?


 eh.


  * Access to Network?


 Yes.


  * Anything else they haven't thought of?


 Probably.:-)


And now the awkward question, what price range would you be prepared to pay for 
something like this?


 At least a buck-two-ninety-eight.  ;-)

--
Cowboy

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Re: [RDD] OT XLR Pi Hat

[drew Roberts]

On Thu, Sep 17, 2015 at 3:32 PM, Robert Jeffares 
wrote:

> XLR Should work in a 1 u environment I have 1u gear with xlr on the back.


Yes, but consider this picture:

https://www.adafruit.com/images/970x728/1761-03.jpg

If you mount the xlr on the audio board and then plug the pi and the audio
board together, the total package might be more than 1u.

If you wanted to do a 1u box however, it would not be unreasonable to have
the xlrs at the end of cable to mount to the back of the 1u box while the
pi and the audio card are mounted elsewhere in the box and not right where
the xlrs are located.

Or am I being dense here?

>
>
> On 18/09/15 02:23, Wayne Merricks wrote:
>
>> Hi,
>>
>> I've been contacted by the IQAudio Pi HAT guys (iqaudio.co.uk). They're
>> looking into the potential of having a balanced XLR output board for the
>> Pi.  I know what we would use it for (1U rack mount receiver, Internal
>> monitoring/network speakers, potentially some sort of IP Phone interface,
>> maybe even a one output Rivendell box with GPIO support).
>>
>> The questions they've asked me is what would you want from such an addon:
>>
>>   * Balanced Audio via..?
>>   o XLR (may not fit into a 1U height restriction)
>>   o Mini XLR
>>   o 3.5mm stereo/balanced Jacks
>>   o Header pins
>>   * Access to GPIO Pins?
>>   * Access to USB?
>>   * Access to Network?
>>   * Anything else they haven't thought of?
>>
>> And now the awkward question, what price range would you be prepared to
>> pay for something like this?
>>
>>
>> Wayne Merricks
>> The Voice Asia
>>
>
all the best,

drew
-- 
http://nakedghosts.blogspot.com/
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Re: [RDD] OT XLR Pi Hat

[Robert Jeffares]

XLR Should work in a 1 u environment I have 1u gear with xlr on the back.

On 18/09/15 02:23, Wayne Merricks wrote:

Hi,

I've been contacted by the IQAudio Pi HAT guys (iqaudio.co.uk). 
They're looking into the potential of having a balanced XLR output 
board for the Pi.  I know what we would use it for (1U rack mount 
receiver, Internal monitoring/network speakers, potentially some sort 
of IP Phone interface, maybe even a one output Rivendell box with GPIO 
support).


The questions they've asked me is what would you want from such an addon:

  * Balanced Audio via..?
  o XLR (may not fit into a 1U height restriction)
  o Mini XLR
  o 3.5mm stereo/balanced Jacks
  o Header pins
  * Access to GPIO Pins?
  * Access to USB?
  * Access to Network?
  * Anything else they haven't thought of?

And now the awkward question, what price range would you be prepared 
to pay for something like this?



Wayne Merricks
The Voice Asia


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