Thanks a lot for sorting this out! This is fixed in
https://github.com/savonet/liquidsoap/commit/12d2141dddf9467343103bd840ff2908076ac9d0

On Tue, May 7, 2013 at 5:36 PM, Romain Beauxis <[email protected]> wrote:
> Hi,
>
> 2013/5/7 Richard Lamont <[email protected]>:
>> Hi,
>>
>> I mentioned this sometime last year but only just got round to doing
>> more work on it.
>>
>> I'm just using liquidsoap to provide real-time processing of loudness
>> and dynamic range for a live linear PCM audio stream that comes in and
>> goes out again via jack.
>>
>> If I run a very simple script, containing just two active lines:
>>
>> stream = input.jack(id="liquidsoap_input")
>> output.jack(stream, id="liquidsoap_output")
>>
>> I would expect liquidsoap to take audio in from jack and feed exactly
>> the same audio back to jack.
>>
>> This doesn't happen. The audio comes out 2.5 dB quieter (75% amplitude)
>> than it went in. This can be verified by feeding a sine wave tone in
>> from, say, jaaa and measuring the level with jnoisemeter.
>>
>> This level discrepancy can be patched in two source files:
>>
>> in  src/sources/bjack_in.ml
>> and src/outputs/bjack_out.ml
>>
>> there is a line which says:
>>
>>           Bjack.set_all_volume dev 75 ;
>>
>> Changing the value from 75 to 100 fixes the problem.
>>
>> I've only tested this on version 1.0.1 but the code in 1.1.0 appears to
>> be the same.
>
> Thanks for the investigation and report! I'll make sure this goes into
> 1.1.1 which is about to go out real soon!
>
> Romain
>
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