[pulseaudio-discuss] Audible plop at beginning when using pcat-simple

[mindfsck]

I repeat myself...use 'paplay' or 'aplay' and the result is fine.

On Sun, Aug 29, 2021 at 6:31 PM guest271314 <guest271314 at gmail.com> wrote:

> How do we know what the expected result is?
>
> On Sun, Aug 29, 2021 at 5:01 AM mindfsck <mindfsck at gmail.com> wrote:
>
>> you could try is making use of the buffering attributes in
>>> pa_simple_new. Specifically, setting prebuf to a suitable value.
>>>
>>
>> I tried setting prebuf to -1, 0, 1, 2, 4, 16, and 320. Made no difference
>> to me.
>>
>> Another thing to check is if there are a couple of silent samples at the
>>> beginning of the problematic wav files
>>>
>>
>> I checked. The first 20ms are silent samples.
>> Attached is the file.
>>
>> On Sun, Aug 29, 2021 at 12:06 AM Sean Greenslade <sean at seangreenslade.com>
>> wrote:
>>
>>> On Fri, Aug 27, 2021 at 04:57:07PM +0200, mindfsck wrote:
>>> > I seem to be to silly for it:
>>> > # sox in.wav -r 22050 out.wav resample
>>> > sox FAIL formats: can't open input file `out.wav': No such file or
>>> directory
>>> >
>>> > Of course there is no out.wav since that's what I want to create!
>>>
>>> I would not bother with trying to change sample rates, that's very
>>> unlikely to be the issue. Plus, a lot of sound cards only support 44.1
>>> kHz and 48 kHz, so pulse would just have to resample it again on
>>> playback.
>>>
>>> One thing you could try is making use of the buffering attributes in
>>> pa_simple_new. Specifically, setting prebuf to a suitable value. There's
>>> some helpful info in the buffer_attr docs page here:
>>>
>>>
>>> https://www.freedesktop.org/software/pulseaudio/doxygen/structpa__buffer__attr.html
>>>
>>> Another thing to check is if there are a couple of silent samples at the
>>> beginning of the problematic wav files. If the first sample is non-zero,
>>> that could potentially cause pops on playback.
>>>
>>> --Sean
>>>
>>>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/pulseaudio-discuss/attachments/20210829/dbddf916/attachment.htm>