PDA

View Full Version : Optical Digital Output - Firmware Fix



Mike Reeve
2004-08-05, 09:20
Hi

I posted something on this some months ago and,
if I recall correctly, at the time Sean said he could do something about it.
But I guess it got 'lost' amongst the more important fixes :-O

When you turn 'off' the Squeezebox via the remote or web interface
the optical digital output stays on
(I'm not sure whether it's just the LED or whether it is sending digital zero
as I don't have an SPDIF analyzer to hand at the moment,
but I have the feeling that it is sending digital zero
as the attached external DAC does not loose lock).

[I think that the outputting of digital zero when the squeezebox is 'off'
is an unintended 'side effect' of a fix that was put in a long time ago
to ensure that digital zero was output between tracks & when paused
to stop external DACs loosing lock ...]

This is a real pain for auto-sensing switches
(like the Audio Authority 1177) that do not look at the content of the signal
but just detect the presence of light
(some like that by Neutek Systems ignore a continuous stream of digital zero).

I recall Sean saying that it was possible to turn the LED off
when the Squeezebox is 'off'.

Sean: Can I assume that this is still on your "to do" list
or should I formally file it as a bug?

BTW I love & covert the new display
but that doesn't stop me loving my 'old' Squeezebox!

Mike

seanadams
2004-08-05, 10:46
Mike,

Please file a bug for this. Yes it is a consequence of fixing the "send
zeroes between tracks".

By the way: what exactly is the undesired behavior that this causes?
Does it make your amp refuse to go into standby?

Sean

On Aug 5, 2004, at 9:20 AM, Mike Reeve wrote:

>
> Hi
>
> I posted something on this some months ago and,
> if I recall correctly, at the time Sean said he could do something
> about it.
> But I guess it got 'lost' amongst the more important fixes :-O
>
> When you turn 'off' the Squeezebox via the remote or web interface
> the optical digital output stays on
> (I'm not sure whether it's just the LED or whether it is sending
> digital zero
> as I don't have an SPDIF analyzer to hand at the moment,
> but I have the feeling that it is sending digital zero
> as the attached external DAC does not loose lock).
>
> [I think that the outputting of digital zero when the squeezebox is
> 'off'
> is an unintended 'side effect' of a fix that was put in a long time ago
> to ensure that digital zero was output between tracks & when paused
> to stop external DACs loosing lock ...]
>
> This is a real pain for auto-sensing switches
> (like the Audio Authority 1177) that do not look at the content of the
> signal
> but just detect the presence of light
> (some like that by Neutek Systems ignore a continuous stream of
> digital zero).
>
> I recall Sean saying that it was possible to turn the LED off
> when the Squeezebox is 'off'.
>
> Sean: Can I assume that this is still on your "to do" list
> or should I formally file it as a bug?
>
> BTW I love & covert the new display
> but that doesn't stop me loving my 'old' Squeezebox!
>
> Mike
>
>
>

Mike Reeve
2004-08-05, 11:04
Sean Adams <sadams@...> writes:

>
> Mike,
>
> Please file a bug for this. Yes it is a consequence of fixing the "send
> zeroes between tracks".
>
> By the way: what exactly is the undesired behavior that this causes?
> Does it make your amp refuse to go into standby?

Sean

My external DAC has only one optical input but
I have a number of devices that I need to connect to it optically
[I know: Why do I need anything else other than a Squeezebox ...? :-)]
so I'm using the Audio Authority 1177 to automatically switch between them.
The 1177 chooses 'live' inputs on a priority basis, so the fact that
the Squeezebox does not turn off it's digital output when 'off' ('standby')
means that anything plugged into a lower priority input than the Squeezebox
never gets selected ...

Mike