Stereo response changing spontaneously?

jimbobalina · Post by **jimbobalina** » Wed May 06, 2015 11:10 pm

I'm seeing the "response" value in stereo mode change spontaneously when playing some audio files. Some seem to cause it to go lower, and other higher. Some audio files don't cause it to change at all.

Is this expected or is there a fault somewhere?

The 2B is a few weeks old with firmware 2.104. Connected using the supplied cable to the headphone jack of a Macbook if it matters.

YouTube · Post by **admin** » Fri May 08, 2015 9:03 pm

It's not something that I have ever seen, before - is it repeatable? How much is it changing?

silicum · Post by **silicum** » Sat May 09, 2015 8:12 pm

Funny, i've recently seen this as well.

I hooked the box up to a Macbook Pro, which I wanted to use as audio source.
Turned out one of the channels did not work, and the response value started changing as soon as I started the audio. I'm also using firmware 2.104.
Maybe it has something to do with the jack socket in the mac (it supports more than just audio, it can also have a mic + volume buttons in the cable).
It does work with an iPhone and a normal PC however, so I don't know whats the exact difference.

YouTube · Post by **admin** » Sun May 10, 2015 10:48 am

I will have a poke when I'm back in the UK next week, I'm assuming this is 2.104? How much is the adjustment changing by? Is the input saturated when it happens?

jimbobalina · Post by **jimbobalina** » Mon May 11, 2015 8:36 am

It'll go all the way to 99 within 10 to 20 seconds.

With the volume turned down this doesn't seem happen, so yes it may well be happening when the input is saturated.

AndrewB4 · Post by **AndrewB4** » Mon May 11, 2015 2:55 pm

Mine do the same when I hook it to my laptop. Some audios increase the response, but slowly.

I'm using the FW 2.104 too.

silicum · Post by **silicum** » Mon May 11, 2015 8:34 pm

I'd like to try again to provide you with more details, but is it safe for the box? (nothing shorting out or anything?)

YouTube · Post by **admin** » Tue May 12, 2015 10:31 am

It would be safe for the 2B, as the audio processing is all done in software. My thought I'd overloading the input is possibly generating rogue pulses on the adjustment control, but in 5 years I'm never seen it before

jimbobalina · Post by **jimbobalina** » Tue May 12, 2015 9:40 pm

Glad I'm not the only one!

10-20 seconds might actually be overstating the rate. I'll time it when I have the chance.

YouTube · Post by **admin** » Tue May 12, 2015 10:45 pm

I'll set up a test rig when I get back (currently on holiday!), so settings and a track would be useful, a video even better

Stereo response changing spontaneously?

Stereo response changing spontaneously?

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