I have a csd that in its original state records a mono input from the
microphone, tweaks it and plays it back.  This works on my laptop and
on android give or take a minor oddity.  I though I might change the
output to stereo and play with panning, but I have a problem.

On the laptop it works OK as I expect.

On android tablet/phone the sound is half speed -- ie lower pitch and
lower speed, unlike the laptop.

I have code
....
nchnls = 2
nchnls_i = 1
....
   asig        in
   kstart      tablewa 2, asig, 0
....
   al, ar      pan2     asig, kpan
               outs     al, ar

Surely that is correct?

Do i have to use a stereo input and throwaway the right?  But
the systems are not the same

==John ffitch

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did you try setting nchnls_i to 1. It could be that the mono input is being split in two channels, effectively running at half sr.
Note that nchnls_i was not working correctly until recently, so if the lib binary is old, this will not work.

Victor Lazzarini
Dean of Arts, Celtic Studies, and Philosophy
Maynooth University
Ireland

> On 9 Mar 2016, at 16:55, jpff  wrote:
> 
> I have a csd that in its original state records a mono input from the
> microphone, tweaks it and plays it back.  This works on my laptop and
> on android give or take a minor oddity.  I though I might change the
> output to stereo and play with panning, but I have a problem.
> 
> On the laptop it works OK as I expect.
> 
> On android tablet/phone the sound is half speed -- ie lower pitch and
> lower speed, unlike the laptop.
> 
> I have code
> ....
> nchnls = 2
> nchnls_i = 1
> ....
>   asig        in
>   kstart      tablewa 2, asig, 0
> ....
>   al, ar      pan2     asig, kpan
>               outs     al, ar
> 
> Surely that is correct?
> 
> Do i have to use a stereo input and throwaway the right?  But
> the systems are not the same
> 
> ==John ffitch
> 
> Csound mailing list
> Csound@listserv.heanet.ie
> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> Send bugs reports to
>        https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here

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I set nchnls_i to  1.  No idea what is in the binary -- says 6.07 ec 
2015 but that is not finished yet.  This is the system downloaded fron 
playstore.

Tried making it all stereo and that works well.

==John

On Wed, 9 Mar 2016, Victor Lazzarini wrote:

> did you try setting nchnls_i to 1. It could be that the mono input is being split in two channels, effectively running at half sr.
> Note that nchnls_i was not working correctly until recently, so if the lib binary is old, this will not work.
>
> Victor Lazzarini
> Dean of Arts, Celtic Studies, and Philosophy
> Maynooth University
> Ireland
>
>> On 9 Mar 2016, at 16:55, jpff  wrote:
>>
>> I have a csd that in its original state records a mono input from the
>> microphone, tweaks it and plays it back.  This works on my laptop and
>> on android give or take a minor oddity.  I though I might change the
>> output to stereo and play with panning, but I have a problem.
>>
>> On the laptop it works OK as I expect.
>>
>> On android tablet/phone the sound is half speed -- ie lower pitch and
>> lower speed, unlike the laptop.
>>
>> I have code
>> ....
>> nchnls = 2
>> nchnls_i = 1
>> ....
>>   asig        in
>>   kstart      tablewa 2, asig, 0
>> ....
>>   al, ar      pan2     asig, kpan
>>               outs     al, ar
>>
>> Surely that is correct?
>>
>> Do i have to use a stereo input and throwaway the right?  But
>> the systems are not the same
>>
>> ==John ffitch
>>
>> Csound mailing list
>> Csound@listserv.heanet.ie
>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>> Send bugs reports to
>>        https://github.com/csound/csound/issues
>> Discussions of bugs and features can be posted here
>
> Csound mailing list
> Csound@listserv.heanet.ie
> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> Send bugs reports to
>        https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here
>

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Ah, then it's because on android input and output channels must be stereo always. I think it rings a bell.

Victor Lazzarini
Dean of Arts, Celtic Studies, and Philosophy
Maynooth University
Ireland

> On 9 Mar 2016, at 19:05, jpff  wrote:
> 
> I set nchnls_i to  1.  No idea what is in the binary -- says 6.07 ec 2015 but that is not finished yet.  This is the system downloaded fron playstore.
> 
> Tried making it all stereo and that works well.
> 
> ==John
> 
>> On Wed, 9 Mar 2016, Victor Lazzarini wrote:
>> 
>> did you try setting nchnls_i to 1. It could be that the mono input is being split in two channels, effectively running at half sr.
>> Note that nchnls_i was not working correctly until recently, so if the lib binary is old, this will not work.
>> 
>> Victor Lazzarini
>> Dean of Arts, Celtic Studies, and Philosophy
>> Maynooth University
>> Ireland
>> 
>>> On 9 Mar 2016, at 16:55, jpff  wrote:
>>> 
>>> I have a csd that in its original state records a mono input from the
>>> microphone, tweaks it and plays it back.  This works on my laptop and
>>> on android give or take a minor oddity.  I though I might change the
>>> output to stereo and play with panning, but I have a problem.
>>> 
>>> On the laptop it works OK as I expect.
>>> 
>>> On android tablet/phone the sound is half speed -- ie lower pitch and
>>> lower speed, unlike the laptop.
>>> 
>>> I have code
>>> ....
>>> nchnls = 2
>>> nchnls_i = 1
>>> ....
>>>  asig        in
>>>  kstart      tablewa 2, asig, 0
>>> ....
>>>  al, ar      pan2     asig, kpan
>>>              outs     al, ar
>>> 
>>> Surely that is correct?
>>> 
>>> Do i have to use a stereo input and throwaway the right?  But
>>> the systems are not the same
>>> 
>>> ==John ffitch
>>> 
>>> Csound mailing list
>>> Csound@listserv.heanet.ie
>>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>>> Send bugs reports to
>>>       https://github.com/csound/csound/issues
>>> Discussions of bugs and features can be posted here
>> 
>> Csound mailing list
>> Csound@listserv.heanet.ie
>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>> Send bugs reports to
>>       https://github.com/csound/csound/issues
>> Discussions of bugs and features can be posted here
> 
> Csound mailing list
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> Send bugs reports to
>       https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here

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Things rings a bell with me too. John, could you try using inch instead of in? I seem to remember in has some hard coded expectation of num channels.

Perhaps this should be trapped in the code

==John

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