Hi,
Interesting results Mike, It is good to know the SB can put out an accurate stream in PCM mode albeit randomly.
I tried Adrians patch a few months ago and couldn't get it to work. (In my defense it sounds like an Apogee Big Ben is a more useful piece of test equipment than an Audio Synthesis DAX).
How long are you seeing it take before the clock has settled at its final frequency?
Neil
From: Mike Reeve <[EMAIL PROTECTED]> Reply-To: Slim Devices Discussion <[email protected]> To: [email protected] Subject: Re: [slim] Digital Output Date: Fri, 4 Mar 2005 05:01:06 +0000 (UTC)
Hi
Some interesting observations ... [? :-O]
Those who recall the history of the digital-out-channel-swap bug will remember that about a year or so ago I spent several hours doing (amongst other things) successive resets of a Squeezebox to try to get a handle on the bug ... :-O
[BTW for those who were not on the list at the time, Sean's conclusion was that the channel-swap bug is unavoidable (with the current DSP) - even if, like me, you only play PCM files! The DSP powers up in 'MP3 mode' so it will always have to switch (if only once) from 'MP3 mode' to 'PCM mode', and whether the channels swap or not on that switch is complete chance (although things do, fortunately, seem to be biased towards not swapping ... :-)]
I just did the same thing (successive resets) again this evening but focusing this time on the frequency of the digital out (as measured, after a reasonable settling time, with an Apogee Big Ben): most times the Squeezebox I was using would settle at 44.13KHz but occasionally it would actually be at 44.10KHz.
So is the frequency, like the channel-swap bug, a matter of chance (within certain limits) ...?
[As an aside I think I noticed, but I was not keeping detailed records of it,
that most times it settled at 44.10 the channels were swapped ... :-O]
I guess all I have done is confirm what we all knew ... ... i.e. that the current DSP is not at its best in 'PCM mode'.
Mike
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