Re: [sc-users] Mix.new question

["Andrew Grathwohl" <andrew@xxxxxxxxxxxxxxxxxxxx>]

Most stations output in stereo, but it takes a stellar reception to actually receive in stereo. My understanding is that the radio sums what it receives into L and R if it cannot receive and accurately decode the 2-channel broadcast by means of phase-inverting one channel with the other, and then placing it in the weaker of the 2 channels. This results in one channel being 180 degrees out of phase with the other channel.

So when you mixed the two channels into one output, you got enough phase cancellation for you to think nothing was being played. I bet you just didn't hear the very slight amount of sound that was probably coming out from the discrepancies between L and R.  
------Original Message------
From: Andre Castro
Sender: owner-sc-users@xxxxxxxxxxxxxxxx
To: sc-users@xxxxxxxxxxxxxxxx
ReplyTo: sc-users@xxxxxxxxxxxxxxxx
Subject: Re: [sc-users] Mix.new question
Sent: Jun 17, 2009 5:27 AM

yeahh, that's really bizarre! wonder if it is my device's fault, or 
their transmission...

Alberto de Campo wrote:
>> Exactly Dan,
>> They L and R chnls are anti-phase.
>>
>> Thanks a lot for the tip.
>
> so it seems you have a really professional radio
> with a symmetrical mono output ;-)
>
> best, a
>
>> a
>>
>> Dan Stowell wrote:
>>
>>> 2009/6/17 Alberto de Campo <mailto:adc@xxxxxxxx><adc@xxxxxxxx>:
>>>
>>>
>>>>> This might be a stupid question, but can anyone tell me why I get 
>>>>> sound
>>>>> from:
>>>>>
>>>>> {Out.ar(0,AudioIn.ar([1,2],0.5))}.play;
>>>>>
>>>>>
>>>>> and when I try to sum the 2 channels I get no output?
>>>>>
>>>>> {Out.ar(0,Mix.new(AudioIn.ar([1,2],0.5)))}.play; //no sound
>>>>>     
>>>> with the built-in mic, I get sound on the first channel with this.
>>>> maybe your left channel is off?
>>>> or you are only playing sound into the right?
>>>>   
>>>
>>> Or maybe your left and right input channels are in antiphase, so that
>>> when summed they cancel out. Try this:
>>>
>>> {Out.ar(0,Mix.new([1, -1] * AudioIn.ar([1,2],0.5)))}.play; //switched
>>> phase of right
>>>
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