[PD] Running the phase vocoder example on the Raspberry Pi

[chris clepper]

Better but I expected it to drop under 50% by doing that.  Maybe most of
the time is spend doing something other than FP DSP computation?

What's the load with the test patch sine output?

On Sun, Sep 16, 2012 at 3:18 PM, Cyrille Henry <ch at chnry.net> wrote:

> hello,
>
> we resintall pd using autoconf and adding this flags.
> this example now run at 65% cpu on the same condition (external usb
> soundcard, 25ms audio buffer)
>
> thanks
> cheers
>
>
> Le 16/09/2012 19:18, chris clepper a écrit :
>
>> Try adding this to the CFLAGS when compiling:
>>
>> |-mfpu=vfp -mfloat-abi=hard|
>>
>>
>> This will enable the hardware floating point unit on the ARM which is
>> actually the vector processor.  It is apparently off by default so everyone
>> might be using integer fixed point which would be very slow.  Hopefully
>> this will help performance.
>>
>> On Thu, Sep 13, 2012 at 6:36 PM, Cyrille Henry <ch at chnry.net <mailto:
>> ch at chnry.net>> wrote:
>>
>>     using 0.44, we manage to have it running with 25ms audio buffer using
>> an external usb soundcard.
>>     85% cpu about. no clicks.
>>
>>     cheers
>>     c
>>
>>
>>     Le 11/09/2012 19:42, Miller Puckette a écrit :
>>
>>         One slight tweak: if you type "sudo chmod 4755 /usr/bin/pd" you
>> will
>>         probably be able to use the mouse clicklessly (at some expense to
>> security!)
>>
>>         This will be unnecessary in release 0.44...
>>
>>         cheers
>>         Miller
>>         On Tue, Sep 11, 2012 at 07:32:16PM +0200, Pierre Massat wrote:
>>
>>             Dear List,
>>
>>             I managed to get the phase vocoder working on my Raspberry
>> Pi, with the
>>             standard Raspbian wheezy distro.
>>             It works ok under the following conditions :
>>             - no GUI activity (even moving the mouse results in awful
>> scratches)
>>             - the "delay" in Pd is set to at least 50ms
>>             - 224 Mb of RAM is allocated to the CPU.
>>
>>             All this using the internal audio output.
>>
>>             This is quite encouraging...
>>
>>             Cheers,
>>
>>             Pierre.
>>
>>
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