fons@email-addr-hidden wrote:
> On Tue, Jun 01, 2010 at 12:18:57AM +0200, Robin Gareus wrote:
>
>> On 05/31/2010 10:42 PM, fons@email-addr-hidden wrote:
>>
>>> If an audio subsystem is using 320MB of memory it's broken. Just dump it.
>>>
>> I think you followed Lennart's presentation @LAC2010 [1] explaining the
>> motivation for this: Pulseaudio keeps buffers sometimes 10 secs long or
>> even more. The reason for that is to have the CPU wake up as little as
>> possible in order to save power.
>
> This is a bogus argument.
>
> Keeping software buffers does not help to reduce the number of
> times the CPU has to wake up - this depends *only* on how much
> the audio *hardware* is able to buffer. For this reason chips
> designed for portable use have something like 2 seconds of
> internal buffering.
>
> 320 MB corresponds to more than ** 13 minutes ** of stereo signal
> in floating point format at 48 kHz.
The first recording studio I helped assemble was a reasonably funded student
radio studios, it was fully analogue, 8-track, good mics .. at the time digital
was beginning to be available, but way beyond our means. It was possible to buy
a digital delay of maybe 10 seconds - I think they were mostly used as a buffer
on the main feed of talkback radio, or as part of very expensive effects units -
but it would have cost as much as the rest of the studio put together, which had
some reasonable gear, and substantially more than a modest sized home in the
cheapish inner suburb we were in.
Simon
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user@email-addr-hidden
http://lists.linuxaudio.org/listinfo/linux-audio-user
Received on Tue Jun 1 12:15:03 2010
This archive was generated by hypermail 2.1.8 : Tue Jun 01 2010 - 12:15:04 EEST