Re: [Jack-Devel] jack_get_sample_rate

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Date	Tue, 13 Dec 2016 10:43:31 +0100
From	Kjetil Matheussen <[hidden] at gmail dot com>
To	ROBERT WOLF <[hidden] at hercsmusicsystems dot com dot au>, "[hidden] at lists dot jackaudio dot org" <[hidden] at lists dot jackaudio dot org>
Follow-Up	Adrian Knoth Re: [Jack-Devel] jack_get_sample_rate

(putting back jack-devel again)

It just says that it configures for 22050Hz, it doesn't say whether it
succeeded.
So things seems to work as it should.



On Tue, Dec 13, 2016 at 10:38 AM, ROBERT WOLF <
[hidden]> wrote:

> Two programs show this information:
>
> 1. QJackCtl.
> 2. When I run my own program *AND* jack server is not running, *THEN* for
> some reason the jack server gets started (apparently using the command
> stored in .jackdrc file) and I see the following printout:
>
> jackd 0.122.0
> Copyright 2001-2009 Paul Davis, Stephane Letz, Jack O'Quinn, Torben Hohn
> and others.
> jackd comes with ABSOLUTELY NO WARRANTY
> This is free software, and you are welcome to redistribute it
> under certain conditions; see the file COPYING for details
>
> JACK compiled with System V SHM support.
> loading driver ..
> apparent rate = 22050
> creating alsa driver ... hw:PCH,0|hw:PCH,0|1024|2|
> 22050|0|0|nomon|swmeter|-|32bit
> ALSA lib conf.c:4578:(parse_args) Unknown parameter 1
> ALSA lib conf.c:4711:(snd_config_expand) Parse arguments error: No such
> file or directory
> ALSA lib control.c:953:(snd_ctl_open_noupdate) Invalid CTL hw:PCH,0
> control open "hw:PCH,0" (No such file or directory)
> configuring for 22050Hz, period = 1024 frames (46.4 ms), buffer = 2 periods
> ALSA: final selected sample format for capture: 32bit integer little-endian
> ALSA: use 2 periods for capture
> ALSA: final selected sample format for playback: 32bit integer
> little-endian
> ALSA: use 2 periods for playback
>
>
>
> *HOWEVER!!!! **jack_get_sample_rate(...);* still reports *44100*.
>
> How intriguing?!
>
>
>
> On 13/12/16 19:53, Kjetil Matheussen wrote:
>
> Which program shows this window?
>
> (added jack-devel mailing list back to the conversation)
>
> On Tue, Dec 13, 2016 at 8:35 AM, ROBERT WOLF <robert.wolf@
> hercsmusicsystems.com.au> wrote:
>
>> There is a window with messages and it says this:
>>
>> configuring for 22050Hz, period = 1024 frames (46.4 ms), buffer = 2
>> periods
>>
>>
>> On 13/12/16 11:09, Kjetil Matheussen wrote:
>>
>>
>>
>> On Mon, Dec 12, 2016 at 7:33 AM, ROBERT WOLF <
>> [hidden]> wrote:
>>
>>> Dear All,
>>>
>>> According to the documentation *jack_get_sample_rate* reports the
>>> sample rate as was used by *jackd*.
>>> This does not happen in my case.
>>> I start *jackd* using different sampling rates (i.e. 22050, ect.).
>>> JACK reports that it does indeed uses the selected sampling rate.
>>>
>>> But *jack_get_sample_rate* always returns 44100.
>>>
>>> Why?
>>>
>>>
>> How did Jack report that it used the selected sampling rate?
>> I.e. where did you read that?
>>
>>
>>
>>
>
>

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