[pulseaudio-discuss] max deviation is never above 50%

[Mike Fisher]

On Sat, Oct 3, 2020 at 11:38 AM Denis Shulyaka <shulyaka at gmail.com> wrote:

> Maybe the ALSA layer between PA and the recording applications makes the
> difference. Could you please also provide the amixer output.
>
> пт, 2 окт. 2020 г. в 14:31, Mike Fisher <mike at fisher5.com>:
>
>> Fresh reboot.
>> I ran these 4 commands simultaneously:
>> arecord -f cd ALSAoutput.wav
>> parecord PAoutput.wav
>> gnome-sound-recorder
>> audacity
>> All volumes to 100%
>> Started them all recording at the same time, and here are my results.
>> arecord -f cd ALSAoutput.wav Full deflection
>> parecord PAoutput.wav Full deflection
>> gnome-sound-recorder 50% deflection
>> audacity Full deflection
>> I did not use  pasuspender for any test.
>>
>>
>> It used to be the case that if I had pulse running it would grab ALSA,
>> and no other applications could use ALSA directly. They had to use pulse
>> which allows more than one application to use sound at the same time. I
>> would open Audacity using the pulse host. Then I would only get 50% max
>> deviation.
>>
>> I don't know what changed, but this is actually the first time I have
>> ever gotten audacity to get full deviation without having to
>> auto spawn=no; pulseaudio -k
>> Then launch Audacity to grab ALSA which causes other apps to be blocked.
>>
>> So this is a good start. Audacity now only sees ALSA as host, and pulse
>> is no longer available as a host. This is confusing me as this never
>> happened before while pulse was still running. I know pulse is running
>> because pavucontrol still shows all its controls.
>>
>> So I reboot and repeat the test to find out that I get the same result
>> a/s above. Audacity has full deviation with pulse running (Audacity only
>> sees ALSA, but works nonetheless). So what am I bitching about, it seems to
>> be working. I should be happy and just go away without understanding WHY
>> this is working. except for 1 item.
>>
>> gnome-sound-recorder only gets 50% max deviation AT THE SAME TIME as 3
>> other applications are getting 100% ma deviation. WHAT????
>>
>> So I have 4 sound clips recorded by 4 different apps all using pulse
>> audio 3 of them get 100% max deviation and one does not.
>>
>> [image: image.png]
>>
>> Here is a fresh system config from right after the above test.
>> https://termbin.com/1hd1
>>
>> Man I hope someone can help me finger this all out.
>>
>>
>> _______________________________________________
>> pulseaudio-discuss mailing list
>> pulseaudio-discuss at lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
>>
>
>
> --
> Best regards,
> Denis Shulyaka
> _______________________________________________
> pulseaudio-discuss mailing list
> pulseaudio-discuss at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
>
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