[Jack-Devel] Is it possible/reasonable to change jack to an int data type?

[Caleb Crome]

Dang, too bad.  I figured it must not be easy because it's not in the
code already.

Thanks for the links.  I'll give them a thorough read..

-Caleb



On Thu, Oct 22, 2015 at 2:38 PM, Paul Davis <paul at linuxaudiosystems.com> wrote:
>
>
> On Thu, Oct 22, 2015 at 5:23 PM, Caleb Crome <caleb at crome.org> wrote:
>>
>> Hi,
>>   I'm building a test application for doing bit-perfect loopback
>> testing on my sound card drivers.  However, since jack uses floating
>> point types, it seems that I can't get a bit-perfect data in and out
>> from (16-bit) 0x0000 to 0xFFFF.  the LSB seems to get rounded on and
>> off, and also it seems that jack enforces a range of  -32767 to +32767
>> instead of -32768 to +32767 (for 16-bit audio).
>>
>> Is it possible that it's as simple as changing
>> jack_default_audio_sample_t?
>
>
> nope.
>
> far easier to just write your own ALSA test client.
>
> i wouldn't get too deeply into this issue unless you've already read bjorn:
>
> http://blog.bjornroche.com/2009/12/int-float-int-its-jungle-out-there.html
> http://blog.bjornroche.com/2009/12/linearity-and-dynamic-range-in-int.html
>
> this email thread has some good stuff too:
>
> http://lists.apple.com/archives/coreaudio-api/2009/Dec/msg00046.html
>
> but perhaps you've already done that :)