[PD] [PD-announce] pd 0.44-0 test 1 released
Jonathan Wilkes
jancsika at yahoo.com
Fri Dec 28 05:44:47 CET 2012
----- Original Message -----
> From: Hans-Christoph Steiner <hans at at.or.at>
> To: IOhannes m zmölnig <zmoelnig at iem.at>
> Cc: pd-list at iem.at
> Sent: Thursday, December 27, 2012 7:44 PM
> Subject: Re: [PD] [PD-announce] pd 0.44-0 test 1 released
>
>
> On Dec 27, 2012, at 5:23 PM, IOhannes m zmölnig wrote:
>
>> On 12/27/2012 21:36, Roman Haefeli wrote:
>>> On Don, 2012-12-27 at 15:29 -0500, Hans-Christoph Steiner wrote:
>>>> On Dec 27, 2012, at 2:14 PM, Roman Haefeli wrote:
>>>>
>>>>> On Die, 2012-12-25 at 13:00 -0800, Miller Puckette wrote:
>>>>>> Hi all -
>>>>>> I'm afraid to 'fix' this riht now, but will
> look at it at least. Alternatively
>>>>>> I could add a message to pd to restort DSP without
> stopping/starting the
>>>>>> audio I/O, which I'm hoping will at least reduce the
> need to start/stop
>>>>>> SDP all the time.
>>>>>>
>>>>>> The change that caused this problem is that I fixed Pd not
> to have the audio
>>>>>> system open whern DSP isn't running so that, on APIs in
> which audio is exclusive
>>>>>> (e.g., ALSA) you can turn DSP off in Pd and go off and use
> another device
>>>>>> with Pd remining open.
>>>>>
>>>>> The problem arises when there is one message trying to control
> many
>>>>> different tasks:
>>>>> * switch DSP computing on/off (save CPU time)
>>>>> * free/occupy the audio back-end (save soundcard time)
>>>>> * mute/unmute Pd (save ears)
>>>>> * force recompilation of the DSP graph
>>>>>
>>>>>> An alternative would be to have Pd automatically close
> audio devices on ALSA,
>>>>>> OSS, and MMIO but always keep it open when using jack. But
> then what about
>>>>>> portaudio? I somply don't know the correct way to deal
> with this.
>>>>>
>>>>> I'd say it's preferable if Pd's behavior is
> independent from the
>>>>> back-end currently in use. Rather, I suggest to use different
> messages
>>>>> for different tasks. IMHO, 'dsp 0' really should only
> turn computation
>>>>> of tilde-objects off as this is what it means and what one
> expects. What
>>>>> about a new message to pd 'card 0|1' to free devices
> which would work
>>>>> completely independently from 'dsp 0|1'? This would
> allow to record a
>>>>> signal to a soundfile without occupying the soundcard, for
> instance.
>>>>
>>>> I think that having a pulseaudio backend for Pd as the default on
>>>> GNU/Linux would be the best way to solve this problem. Pulse will
>>>> then handle the multiple apps playing at the same time. Then for
>>>> people who want to skip Pulse, then can use the ALSA blocking
>>>> implementation.
>>
>>
>> pulse audio never worked for me on various debian gnu/linux setups.
>> these days i only ever use alsa and jack, and i believe that one of these
> (preferably the latter) should be the default for a pro-grade audio software.
>
> Yes, jack is great, and we should make it easy to use. Debian, Ubuntu, Mint,
> Fedora and others all come with pulseaudio installed and setup by default. That
> covers probably 75% or more of GNU/Linux users. Pd should have working audio
> without the users having to do anything at all. So it looks like the only way
> to achieve that is pulseaudio support. And no, I don't consider Pd's
> ALSA/OSS connecting to pulseaudio and blocking all other sound a working
> situation.
I'd like to get a timestamp from IOhannes for his comment on PulseAudio not working
on any GNU/Linux systems. When I look at the PulseAudio docs I like what I see,
but unfortunately like Gnome 3 the lead developers of PA seemed to have pushed
very hard to get a half-baked initial implementation in as many distros as possible
so as to cause the maximum amount of flamewars for something that should have
otherwise been a solution to many of the usability problems that have plagued
GNU/Linux for so long.
In other words if there are _still_ substantial problems with getting PA to behave,
maybe we could do an Ardour-style "it just works" default to the jack server that
doesn't require the user to have to know they are even using jack. After all,
isn't jack cross-platform (and PulseAudio not)?
-Jonathan
More information about the Pd-list
mailing list