Re: [RDD] Audioscience AES/EBU or S/PDIF output type

2022-02-22 Thread Fred Gleason 
On Feb 21, 2022, at 21:34, Gavin Stephens  wrote:
> I haven't tried connecting the ASI5111 digital I/O to anything yet to see if 
> the output is working by default so I'm not sure if it's even going 
> regardless of what 'Audio Ports' doesn't report. 
> 
> The card only shows as having one output but this is all I got on on my 
> non-Linux machine too, the digital output was just a clone of whatever was on 
> the analogue outputs. 
> 
That exactly correct. If you look at the card mixer diagram, you’ll see that 
the analog and AES3 outputs are hardwired together. There is no 
software-controllable method for splitting them.

It’s the *inputs* that have the ‘oddball’ routing capabilities.

Cheers!


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Re: [RDD] Audioscience AES/EBU or S/PDIF output type

2022-02-21 Thread Gavin Stephens 

On 22/02/2022 5:35 am, Bill Putney wrote:


This seemed to be true of at least the older AES3 interfaces on 
Wheatstone boards. If the "consumer bit" was set in the header, the 
board wouldn't accept data. Our Logitek boards ignored that bit. For 
the first few years of operation we used some $25 USB to TOSLINK 
(Optical SPDIF) block bought on eBay connected to an TOSLINK to AES3 
converter. We stopped when the drivers for those fell out of a new 
Centos release. The same outfit also made USB to coaxial (RCA pin 
jack) SPDIF versions. I found a nice paper written by Rane that goes 
into some detail about converting AES and SPDIF at the electrical level.


https://www.ranecommercial.com/legacy/pdf/ranenotes/Interfacing_AES3_&_SPDIF.pdf 




That's handy to have thanks :)

I haven't tried connecting the ASI5111 digital I/O to anything yet to 
see if the output is working by default so I'm not sure if it's even 
going regardless of what 'Audio Ports' doesn't report.


The card only shows as having one output but this is all I got on on my 
non-Linux machine too, the digital output was just a clone of whatever 
was on the analogue outputs.


This might be a deciding factor to keep it analogue as the upstream 
interface I want to use costs half the price of another ASI card, and 
having digital was a deciding factor for getting it. So I might put this 
off now until I upgrade the ASI card some time.



Thanks again for that pdf link.




- Bill

On 2/21/22 6:20 AM, Fred Gleason wrote:

On Feb 20, 2022, at 16:46, Rob Landry <41001...@interpring.com> wrote:

I have connected SPDIF outputs to AES/EBU inputs and had them work; 
I've not tried the other way around. I recall reading somewhere that 
the differences between the two are essentially that AES/EBU is 
balanced and SPDIF is unbalanced. The voltage levels are different 
too, I think.


The data header formats are different too. _Usually_, these 
differences can be ignored; although I have run across some gear (the 
old 360 Systems ‘Instant Replay’ unit comes to mind) where the AES3 
input refuses to process any signal that doesn’t have the correct 
AES3 header. I don’t believe this should be a problem for ASI cards 
though.


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] Audioscience AES/EBU or S/PDIF output type

2022-02-21 Thread Bill Putney 
This seemed to be true of at least the older AES3 interfaces on 
Wheatstone boards. If the "consumer bit" was set in the header, the 
board wouldn't accept data. Our Logitek boards ignored that bit. For the 
first few years of operation we used some $25 USB to TOSLINK (Optical 
SPDIF) block bought on eBay connected to an TOSLINK to AES3 converter. 
We stopped when the drivers for those fell out of a new Centos release. 
The same outfit also made USB to coaxial (RCA pin jack) SPDIF versions. 
I found a nice paper written by Rane that goes into some detail about 
converting AES and SPDIF at the electrical level.


https://www.ranecommercial.com/legacy/pdf/ranenotes/Interfacing_AES3_&_SPDIF.pdf 



- Bill

On 2/21/22 6:20 AM, Fred Gleason wrote:

On Feb 20, 2022, at 16:46, Rob Landry <41001...@interpring.com> wrote:

I have connected SPDIF outputs to AES/EBU inputs and had them work; 
I've not tried the other way around. I recall reading somewhere that 
the differences between the two are essentially that AES/EBU is 
balanced and SPDIF is unbalanced. The voltage levels are different 
too, I think.


The data header formats are different too. _Usually_, these 
differences can be ignored; although I have run across some gear (the 
old 360 Systems ‘Instant Replay’ unit comes to mind) where the AES3 
input refuses to process any signal that doesn’t have the correct AES3 
header. I don’t believe this should be a problem for ASI cards though.


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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Bill Putney
Chief Engineer - KPTZ
Private Pilot-Single Engine Land | A & P / IA Mechanic
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Re: [RDD] Audioscience AES/EBU or S/PDIF output type

2022-02-21 Thread Fred Gleason 
On Feb 20, 2022, at 16:46, Rob Landry <41001...@interpring.com> wrote:

> I have connected SPDIF outputs to AES/EBU inputs and had them work; I've not 
> tried the other way around. I recall reading somewhere that the differences 
> between the two are essentially that AES/EBU is balanced and SPDIF is 
> unbalanced. The voltage levels are different too, I think.

The data header formats are different too. _Usually_, these differences can be 
ignored; although I have run across some gear (the old 360 Systems ‘Instant 
Replay’ unit comes to mind) where the AES3 input refuses to process any signal 
that doesn’t have the correct AES3 header. I don’t believe this should be a 
problem for ASI cards though.

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] Audioscience AES/EBU or S/PDIF output type

2022-02-20 Thread Rob Landry 


I have connected SPDIF outputs to AES/EBU inputs and had them work; I've 
not tried the other way around. I recall reading somewhere that the 
differences between the two are essentially that AES/EBU is balanced and 
SPDIF is unbalanced. The voltage levels are different too, I think.



Rob

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Re: [RDD] Audioscience AES/EBU or S/PDIF output type

2022-02-19 Thread Fred Gleason 
On Feb 19, 2022, at 01:56, Gavin Stephens  wrote:

> If I can only select the input digital type on my Audioscience AS5111 in 
> rdadmin, do I take it that my card's digital output type selection is not 
> currently supported by the HPI driver or RD 3.6.2?
> 
> The only output changes I can make are to the analogue ref. level from what I 
> can see. I know the card can do both AES/EBU or S/PDIF output but I can't 
> find any selection for this.

It’s been awhile (and I don’t have one handy to check), but I do recall that 
that card is an oddball in several ways; one of which is that there are 
actually *two* independent capture inputs: the first one via the analog input 
and the second via the digital. You should see this reflected in the ‘Audio 
Resources’ page in rdadmin(1), which should report two inputs. Set the channel 
input assignments to use port 1 on the card and you should get digital. IIRC, 
it’s AES3 only; I don’t believe S/PDIF is supported on that card.

You can find the mixer diagram on page 1 of the data sheet, at:


https://www.audioscience.com/internet/products/obsolete/datasheet_asi5111_5211.pdf

Cheers!


|-|
| Frederick F. Gleason, Jr. | Chief Developer |
|   | Paravel Systems |
|-|
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| |
| -- Cicero   |
|-|

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[RDD] Audioscience AES/EBU or S/PDIF output type

2022-02-18 Thread Gavin Stephens 

RE: subject,

If I can only select the input digital type on my Audioscience AS5111 in 
rdadmin, do I take it that my card's digital output type selection is 
not currently supported by the HPI driver or RD 3.6.2?


The only output changes I can make are to the analogue ref. level from 
what I can see. I know the card can do both AES/EBU or S/PDIF output but 
I can't find any selection for this.


Thanks,

Gavin.



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